/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/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:44:37,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:44:37,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:44:37,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 21:44:37,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 21:44:37,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 21:44:37,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 21:44:37,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 21:44:37,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 21:44:37,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 21:44:37,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 21:44:37,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 21:44:37,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:44:37,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:44:37,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:44:37,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:44:37,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:44:37,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:44:37,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:44:37,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:44:37,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:44:37,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:44:37,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:44:37,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:44:37,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:44:37,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:44:37,778 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:44:37,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:44:37,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:44:37,783 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:44:37,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:44:37,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:44:37,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:44:37,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:44:37,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:44:37,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:44:37,786 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:44:37,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:44:37,787 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:44:37,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:44:37,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:44:37,788 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:44:37,788 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:44:37,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:44:37,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:44:37,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:44:37,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:44:37,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:44:37,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:44:38,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:44:38,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:44:38,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:44:38,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:44:38,222 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:44:38,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-10-23 21:44:38,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dd130035/7e7ed1c498f2473683bfaa05401354db/FLAG6b218320e [2020-10-23 21:44:38,900 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:44:38,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-10-23 21:44:38,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dd130035/7e7ed1c498f2473683bfaa05401354db/FLAG6b218320e [2020-10-23 21:44:39,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dd130035/7e7ed1c498f2473683bfaa05401354db [2020-10-23 21:44:39,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:44:39,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:44:39,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:44:39,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:44:39,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:44:39,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:44:39" (1/1) ... [2020-10-23 21:44:39,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a0df8cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:39, skipping insertion in model container [2020-10-23 21:44:39,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:44:39" (1/1) ... [2020-10-23 21:44:39,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:44:39,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:44:39,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:44:39,576 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:44:39,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:44:39,619 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:44:39,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:39 WrapperNode [2020-10-23 21:44:39,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:44:39,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:44:39,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:44:39,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:44:39,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:39" (1/1) ... [2020-10-23 21:44:39,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:39" (1/1) ... [2020-10-23 21:44:39,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:39" (1/1) ... [2020-10-23 21:44:39,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:39" (1/1) ... [2020-10-23 21:44:39,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:39" (1/1) ... [2020-10-23 21:44:39,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:39" (1/1) ... [2020-10-23 21:44:39,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:39" (1/1) ... [2020-10-23 21:44:39,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:44:39,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:44:39,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:44:39,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:44:39,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:39" (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 [2020-10-23 21:44:39,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:44:39,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:44:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:44:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:44:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-23 21:44:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:44:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 21:44:39,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:44:39,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:44:39,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 21:44:39,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 21:44:39,753 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:44:39,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:44:39,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:44:39,754 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 21:44:39,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 21:44:39,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 21:44:39,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:44:39,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 21:44:39,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:44:39,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:44:39,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:44:39,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:44:39,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:44:39,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:44:40,159 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:44:40,160 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 21:44:40,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:44:40 BoogieIcfgContainer [2020-10-23 21:44:40,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:44:40,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:44:40,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:44:40,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:44:40,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:44:39" (1/3) ... [2020-10-23 21:44:40,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dedd0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:44:40, skipping insertion in model container [2020-10-23 21:44:40,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:39" (2/3) ... [2020-10-23 21:44:40,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dedd0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:44:40, skipping insertion in model container [2020-10-23 21:44:40,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:44:40" (3/3) ... [2020-10-23 21:44:40,178 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-10-23 21:44:40,201 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:44:40,207 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:44:40,224 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:44:40,253 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:44:40,253 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:44:40,253 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:44:40,253 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:44:40,253 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:44:40,254 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:44:40,254 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:44:40,254 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:44:40,272 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-23 21:44:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 21:44:40,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:40,285 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, 1, 1, 1] [2020-10-23 21:44:40,286 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:40,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:40,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1175551776, now seen corresponding path program 1 times [2020-10-23 21:44:40,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:40,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690595632] [2020-10-23 21:44:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:40,392 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:40,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:40,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:40,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690595632] [2020-10-23 21:44:40,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:40,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 21:44:40,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188441796] [2020-10-23 21:44:40,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 21:44:40,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:40,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 21:44:40,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 21:44:40,825 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-10-23 21:44:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:41,166 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-10-23 21:44:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 21:44:41,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-23 21:44:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:41,181 INFO L225 Difference]: With dead ends: 121 [2020-10-23 21:44:41,181 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 21:44:41,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:44:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 21:44:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-10-23 21:44:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 21:44:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-23 21:44:41,259 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-10-23 21:44:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:41,259 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-23 21:44:41,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 21:44:41,260 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-23 21:44:41,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 21:44:41,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:41,262 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:41,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:44:41,263 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:41,264 INFO L82 PathProgramCache]: Analyzing trace with hash -69019303, now seen corresponding path program 1 times [2020-10-23 21:44:41,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:41,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858229934] [2020-10-23 21:44:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:41,336 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:41,339 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:41,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:41,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:41,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858229934] [2020-10-23 21:44:41,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:41,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 21:44:41,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930185735] [2020-10-23 21:44:41,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 21:44:41,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:41,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 21:44:41,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:44:41,484 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 7 states. [2020-10-23 21:44:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:41,803 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-10-23 21:44:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 21:44:41,803 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-23 21:44:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:41,806 INFO L225 Difference]: With dead ends: 100 [2020-10-23 21:44:41,806 INFO L226 Difference]: Without dead ends: 83 [2020-10-23 21:44:41,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:44:41,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-23 21:44:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-10-23 21:44:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 21:44:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-10-23 21:44:41,824 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2020-10-23 21:44:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:41,825 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-10-23 21:44:41,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 21:44:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-10-23 21:44:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-23 21:44:41,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:41,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:41,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:44:41,828 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:41,829 INFO L82 PathProgramCache]: Analyzing trace with hash -532040000, now seen corresponding path program 2 times [2020-10-23 21:44:41,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:41,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544605765] [2020-10-23 21:44:41,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:42,076 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:42,078 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:42,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:42,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:42,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544605765] [2020-10-23 21:44:42,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:42,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 21:44:42,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830451710] [2020-10-23 21:44:42,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 21:44:42,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:42,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 21:44:42,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:44:42,260 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 7 states. [2020-10-23 21:44:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:42,624 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2020-10-23 21:44:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 21:44:42,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-23 21:44:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:42,626 INFO L225 Difference]: With dead ends: 109 [2020-10-23 21:44:42,627 INFO L226 Difference]: Without dead ends: 70 [2020-10-23 21:44:42,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-23 21:44:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-23 21:44:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-10-23 21:44:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 21:44:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-23 21:44:42,641 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 49 [2020-10-23 21:44:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:42,641 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-23 21:44:42,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 21:44:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-23 21:44:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-23 21:44:42,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:42,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:42,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:44:42,644 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash -661502084, now seen corresponding path program 1 times [2020-10-23 21:44:42,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:42,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572327395] [2020-10-23 21:44:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:42,988 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:42,990 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:43,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:43,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:43,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572327395] [2020-10-23 21:44:43,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:43,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 21:44:43,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117897193] [2020-10-23 21:44:43,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 21:44:43,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:43,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 21:44:43,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 21:44:43,244 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 9 states. [2020-10-23 21:44:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:43,693 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2020-10-23 21:44:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 21:44:43,694 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-23 21:44:43,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:43,696 INFO L225 Difference]: With dead ends: 115 [2020-10-23 21:44:43,697 INFO L226 Difference]: Without dead ends: 76 [2020-10-23 21:44:43,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-23 21:44:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-23 21:44:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-23 21:44:43,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-23 21:44:43,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-23 21:44:43,711 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-10-23 21:44:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:43,711 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-23 21:44:43,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 21:44:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-23 21:44:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-23 21:44:43,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:43,714 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:43,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:44:43,715 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:43,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:43,715 INFO L82 PathProgramCache]: Analyzing trace with hash -717071560, now seen corresponding path program 2 times [2020-10-23 21:44:43,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:43,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403037533] [2020-10-23 21:44:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:44,511 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:44,513 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:44,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:44,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:44,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403037533] [2020-10-23 21:44:44,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:44,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 21:44:44,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346090024] [2020-10-23 21:44:44,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 21:44:44,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 21:44:44,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-23 21:44:44,959 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 11 states. [2020-10-23 21:44:45,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:45,501 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2020-10-23 21:44:45,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 21:44:45,502 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-23 21:44:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:45,503 INFO L225 Difference]: With dead ends: 121 [2020-10-23 21:44:45,504 INFO L226 Difference]: Without dead ends: 82 [2020-10-23 21:44:45,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-10-23 21:44:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-23 21:44:45,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-10-23 21:44:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-23 21:44:45,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-23 21:44:45,518 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-10-23 21:44:45,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:45,518 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-23 21:44:45,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 21:44:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-23 21:44:45,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 21:44:45,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:45,520 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:45,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 21:44:45,520 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2104209908, now seen corresponding path program 3 times [2020-10-23 21:44:45,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:45,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770449471] [2020-10-23 21:44:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:46,337 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:46,339 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:46,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770449471] [2020-10-23 21:44:46,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:46,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-23 21:44:46,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388768305] [2020-10-23 21:44:46,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 21:44:46,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:46,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 21:44:46,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-23 21:44:46,825 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 13 states. [2020-10-23 21:44:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:47,428 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2020-10-23 21:44:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 21:44:47,430 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-23 21:44:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:47,431 INFO L225 Difference]: With dead ends: 127 [2020-10-23 21:44:47,432 INFO L226 Difference]: Without dead ends: 88 [2020-10-23 21:44:47,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-10-23 21:44:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-23 21:44:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-23 21:44:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-23 21:44:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-10-23 21:44:47,449 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-10-23 21:44:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:47,451 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-10-23 21:44:47,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 21:44:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-10-23 21:44:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-23 21:44:47,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:47,457 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2020-10-23 21:44:47,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 21:44:47,458 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:47,458 INFO L82 PathProgramCache]: Analyzing trace with hash -741340240, now seen corresponding path program 4 times [2020-10-23 21:44:47,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:47,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325378413] [2020-10-23 21:44:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:48,198 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:48,200 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:48,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:48,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:48,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325378413] [2020-10-23 21:44:48,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:48,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 21:44:48,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059746743] [2020-10-23 21:44:48,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 21:44:48,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:48,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 21:44:48,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-23 21:44:48,767 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 15 states. [2020-10-23 21:44:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:49,501 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2020-10-23 21:44:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 21:44:49,502 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-23 21:44:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:49,506 INFO L225 Difference]: With dead ends: 133 [2020-10-23 21:44:49,507 INFO L226 Difference]: Without dead ends: 94 [2020-10-23 21:44:49,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-10-23 21:44:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-23 21:44:49,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-23 21:44:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-23 21:44:49,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-10-23 21:44:49,541 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-10-23 21:44:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:49,543 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-10-23 21:44:49,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 21:44:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-10-23 21:44:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-23 21:44:49,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:49,545 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1] [2020-10-23 21:44:49,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 21:44:49,546 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1293866900, now seen corresponding path program 5 times [2020-10-23 21:44:49,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:49,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550547535] [2020-10-23 21:44:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:50,302 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:50,304 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:50,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:50,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:50,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550547535] [2020-10-23 21:44:50,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:50,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 21:44:50,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136663002] [2020-10-23 21:44:50,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 21:44:50,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:50,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 21:44:50,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-23 21:44:50,944 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 17 states. [2020-10-23 21:44:51,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:51,728 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2020-10-23 21:44:51,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 21:44:51,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-10-23 21:44:51,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:51,731 INFO L225 Difference]: With dead ends: 139 [2020-10-23 21:44:51,731 INFO L226 Difference]: Without dead ends: 100 [2020-10-23 21:44:51,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-10-23 21:44:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-23 21:44:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-23 21:44:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-23 21:44:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-10-23 21:44:51,767 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-10-23 21:44:51,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:51,768 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-10-23 21:44:51,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 21:44:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-10-23 21:44:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-23 21:44:51,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:51,775 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2020-10-23 21:44:51,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 21:44:51,776 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:51,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1220593704, now seen corresponding path program 6 times [2020-10-23 21:44:51,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:51,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312350878] [2020-10-23 21:44:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:52,557 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:52,559 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:52,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:52,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:53,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312350878] [2020-10-23 21:44:53,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:53,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-23 21:44:53,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636387743] [2020-10-23 21:44:53,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 21:44:53,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:53,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 21:44:53,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-23 21:44:53,410 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 19 states. [2020-10-23 21:44:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:54,308 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2020-10-23 21:44:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-23 21:44:54,310 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-10-23 21:44:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:54,311 INFO L225 Difference]: With dead ends: 145 [2020-10-23 21:44:54,312 INFO L226 Difference]: Without dead ends: 106 [2020-10-23 21:44:54,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 21:44:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-23 21:44:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-10-23 21:44:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-23 21:44:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-10-23 21:44:54,335 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-10-23 21:44:54,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:54,335 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-10-23 21:44:54,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 21:44:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-10-23 21:44:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-23 21:44:54,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:54,337 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1] [2020-10-23 21:44:54,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 21:44:54,337 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:54,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:54,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1824478492, now seen corresponding path program 7 times [2020-10-23 21:44:54,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:54,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385337101] [2020-10-23 21:44:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:55,075 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:55,076 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:55,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:55,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:55,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385337101] [2020-10-23 21:44:55,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:55,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-10-23 21:44:55,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992477541] [2020-10-23 21:44:55,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 21:44:55,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:55,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 21:44:55,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-23 21:44:55,953 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 21 states. [2020-10-23 21:44:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:56,991 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2020-10-23 21:44:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-23 21:44:56,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-10-23 21:44:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:56,995 INFO L225 Difference]: With dead ends: 151 [2020-10-23 21:44:56,995 INFO L226 Difference]: Without dead ends: 112 [2020-10-23 21:44:56,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 21:44:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-23 21:44:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-10-23 21:44:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-23 21:44:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-23 21:44:57,022 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-10-23 21:44:57,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:57,022 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-23 21:44:57,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 21:44:57,023 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-23 21:44:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-23 21:44:57,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:57,024 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1] [2020-10-23 21:44:57,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 21:44:57,024 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:57,025 INFO L82 PathProgramCache]: Analyzing trace with hash -605908832, now seen corresponding path program 8 times [2020-10-23 21:44:57,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:57,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717590215] [2020-10-23 21:44:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:57,805 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:57,807 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:57,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:57,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:44:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:44:58,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717590215] [2020-10-23 21:44:58,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:58,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-10-23 21:44:58,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035464480] [2020-10-23 21:44:58,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 21:44:58,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:58,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 21:44:58,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-10-23 21:44:58,789 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 23 states. [2020-10-23 21:44:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:59,939 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2020-10-23 21:44:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-23 21:44:59,940 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-10-23 21:44:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:59,942 INFO L225 Difference]: With dead ends: 157 [2020-10-23 21:44:59,942 INFO L226 Difference]: Without dead ends: 118 [2020-10-23 21:44:59,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-10-23 21:44:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-23 21:44:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-23 21:44:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-23 21:44:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-10-23 21:44:59,969 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-10-23 21:44:59,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:59,969 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-10-23 21:44:59,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 21:44:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-10-23 21:44:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-23 21:44:59,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:59,975 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1] [2020-10-23 21:44:59,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 21:44:59,978 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:59,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:59,979 INFO L82 PathProgramCache]: Analyzing trace with hash 869808476, now seen corresponding path program 9 times [2020-10-23 21:44:59,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:59,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011359143] [2020-10-23 21:44:59,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:00,715 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:00,716 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:00,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:00,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:01,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011359143] [2020-10-23 21:45:01,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:01,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-10-23 21:45:01,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420330796] [2020-10-23 21:45:01,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 21:45:01,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:01,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 21:45:01,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-10-23 21:45:01,849 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 25 states. [2020-10-23 21:45:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:03,106 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2020-10-23 21:45:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-23 21:45:03,107 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2020-10-23 21:45:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:03,108 INFO L225 Difference]: With dead ends: 163 [2020-10-23 21:45:03,108 INFO L226 Difference]: Without dead ends: 124 [2020-10-23 21:45:03,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 21:45:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-23 21:45:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-10-23 21:45:03,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-23 21:45:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-10-23 21:45:03,126 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-10-23 21:45:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:03,126 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-10-23 21:45:03,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 21:45:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-10-23 21:45:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-23 21:45:03,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:03,128 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1] [2020-10-23 21:45:03,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 21:45:03,128 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:03,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:03,129 INFO L82 PathProgramCache]: Analyzing trace with hash -268212968, now seen corresponding path program 10 times [2020-10-23 21:45:03,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:03,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681318816] [2020-10-23 21:45:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:03,852 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:03,854 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:03,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:03,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:05,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681318816] [2020-10-23 21:45:05,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:05,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-10-23 21:45:05,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444409231] [2020-10-23 21:45:05,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 21:45:05,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:05,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 21:45:05,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-10-23 21:45:05,185 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 27 states. [2020-10-23 21:45:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:06,758 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2020-10-23 21:45:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-23 21:45:06,759 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-10-23 21:45:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:06,761 INFO L225 Difference]: With dead ends: 169 [2020-10-23 21:45:06,761 INFO L226 Difference]: Without dead ends: 130 [2020-10-23 21:45:06,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-10-23 21:45:06,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-23 21:45:06,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-10-23 21:45:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-23 21:45:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-10-23 21:45:06,778 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-10-23 21:45:06,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:06,779 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-10-23 21:45:06,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 21:45:06,779 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-10-23 21:45:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-23 21:45:06,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:06,781 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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, 1, 1, 1, 1, 1] [2020-10-23 21:45:06,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 21:45:06,781 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:06,782 INFO L82 PathProgramCache]: Analyzing trace with hash 620090324, now seen corresponding path program 11 times [2020-10-23 21:45:06,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:06,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140889762] [2020-10-23 21:45:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:07,521 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:07,523 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:07,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:07,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:09,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140889762] [2020-10-23 21:45:09,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:09,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-10-23 21:45:09,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183368980] [2020-10-23 21:45:09,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-23 21:45:09,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:09,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-23 21:45:09,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-10-23 21:45:09,022 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 29 states. [2020-10-23 21:45:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:10,692 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2020-10-23 21:45:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-23 21:45:10,693 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-23 21:45:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:10,695 INFO L225 Difference]: With dead ends: 175 [2020-10-23 21:45:10,695 INFO L226 Difference]: Without dead ends: 136 [2020-10-23 21:45:10,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 21:45:10,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-23 21:45:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-10-23 21:45:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-23 21:45:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-10-23 21:45:10,715 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-10-23 21:45:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:10,715 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-10-23 21:45:10,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-23 21:45:10,715 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-10-23 21:45:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-23 21:45:10,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:10,716 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 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, 1, 1, 1, 1, 1] [2020-10-23 21:45:10,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 21:45:10,717 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:10,717 INFO L82 PathProgramCache]: Analyzing trace with hash 586237328, now seen corresponding path program 12 times [2020-10-23 21:45:10,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:10,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64174898] [2020-10-23 21:45:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:11,459 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:11,461 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:11,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:11,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:13,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64174898] [2020-10-23 21:45:13,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:13,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-10-23 21:45:13,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16089187] [2020-10-23 21:45:13,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 21:45:13,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:13,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 21:45:13,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-10-23 21:45:13,152 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 31 states. [2020-10-23 21:45:15,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:15,031 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2020-10-23 21:45:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-23 21:45:15,032 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2020-10-23 21:45:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:15,034 INFO L225 Difference]: With dead ends: 181 [2020-10-23 21:45:15,034 INFO L226 Difference]: Without dead ends: 142 [2020-10-23 21:45:15,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-10-23 21:45:15,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-23 21:45:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-10-23 21:45:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-23 21:45:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-10-23 21:45:15,054 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-10-23 21:45:15,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:15,054 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-10-23 21:45:15,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 21:45:15,054 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-10-23 21:45:15,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-23 21:45:15,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:15,056 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 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, 1, 1, 1, 1, 1] [2020-10-23 21:45:15,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 21:45:15,056 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:15,057 INFO L82 PathProgramCache]: Analyzing trace with hash -236488116, now seen corresponding path program 13 times [2020-10-23 21:45:15,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:15,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206560401] [2020-10-23 21:45:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:15,798 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:15,800 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:15,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:15,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:17,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206560401] [2020-10-23 21:45:17,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:17,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-10-23 21:45:17,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67788878] [2020-10-23 21:45:17,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-23 21:45:17,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:17,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-23 21:45:17,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 21:45:17,522 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 33 states. [2020-10-23 21:45:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:19,441 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2020-10-23 21:45:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-23 21:45:19,442 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 127 [2020-10-23 21:45:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:19,444 INFO L225 Difference]: With dead ends: 187 [2020-10-23 21:45:19,444 INFO L226 Difference]: Without dead ends: 148 [2020-10-23 21:45:19,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-10-23 21:45:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-23 21:45:19,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-10-23 21:45:19,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-23 21:45:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-10-23 21:45:19,465 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-10-23 21:45:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:19,465 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-10-23 21:45:19,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-23 21:45:19,465 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-10-23 21:45:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-23 21:45:19,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:19,467 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 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, 1, 1, 1, 1, 1] [2020-10-23 21:45:19,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 21:45:19,467 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:19,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:19,468 INFO L82 PathProgramCache]: Analyzing trace with hash -847629816, now seen corresponding path program 14 times [2020-10-23 21:45:19,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:19,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675127520] [2020-10-23 21:45:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:20,223 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:20,225 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:20,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:20,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:22,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675127520] [2020-10-23 21:45:22,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:22,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-10-23 21:45:22,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12156900] [2020-10-23 21:45:22,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-23 21:45:22,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:22,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-23 21:45:22,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 21:45:22,247 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 35 states. [2020-10-23 21:45:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:24,754 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2020-10-23 21:45:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-23 21:45:24,755 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2020-10-23 21:45:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:24,757 INFO L225 Difference]: With dead ends: 193 [2020-10-23 21:45:24,757 INFO L226 Difference]: Without dead ends: 154 [2020-10-23 21:45:24,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-10-23 21:45:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-23 21:45:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-10-23 21:45:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-23 21:45:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-10-23 21:45:24,776 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-10-23 21:45:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:24,776 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-10-23 21:45:24,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-23 21:45:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-10-23 21:45:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-23 21:45:24,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:24,778 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 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, 1, 1, 1, 1, 1] [2020-10-23 21:45:24,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 21:45:24,778 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:24,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1594151740, now seen corresponding path program 15 times [2020-10-23 21:45:24,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:24,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211876972] [2020-10-23 21:45:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:25,519 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:25,520 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:25,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:25,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:27,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211876972] [2020-10-23 21:45:27,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:27,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-10-23 21:45:27,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863621030] [2020-10-23 21:45:27,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-23 21:45:27,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:27,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-23 21:45:27,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 21:45:27,724 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 37 states. [2020-10-23 21:45:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:30,406 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2020-10-23 21:45:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-23 21:45:30,407 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 139 [2020-10-23 21:45:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:30,408 INFO L225 Difference]: With dead ends: 199 [2020-10-23 21:45:30,408 INFO L226 Difference]: Without dead ends: 160 [2020-10-23 21:45:30,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-10-23 21:45:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-23 21:45:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-10-23 21:45:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-23 21:45:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-10-23 21:45:30,427 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-10-23 21:45:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:30,428 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-10-23 21:45:30,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-23 21:45:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-10-23 21:45:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-23 21:45:30,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:30,429 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 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, 1, 1, 1, 1, 1] [2020-10-23 21:45:30,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 21:45:30,429 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:30,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2090063232, now seen corresponding path program 16 times [2020-10-23 21:45:30,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:30,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138765557] [2020-10-23 21:45:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:31,188 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:31,189 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:31,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:31,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:33,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138765557] [2020-10-23 21:45:33,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:33,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-10-23 21:45:33,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361245684] [2020-10-23 21:45:33,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-23 21:45:33,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:33,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-23 21:45:33,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 21:45:33,561 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 39 states. [2020-10-23 21:45:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:36,222 INFO L93 Difference]: Finished difference Result 205 states and 215 transitions. [2020-10-23 21:45:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-23 21:45:36,222 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 145 [2020-10-23 21:45:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:36,223 INFO L225 Difference]: With dead ends: 205 [2020-10-23 21:45:36,224 INFO L226 Difference]: Without dead ends: 166 [2020-10-23 21:45:36,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-10-23 21:45:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-23 21:45:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-10-23 21:45:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-23 21:45:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-10-23 21:45:36,248 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-10-23 21:45:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:36,249 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-10-23 21:45:36,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-23 21:45:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-10-23 21:45:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-23 21:45:36,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:36,250 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 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, 1, 1, 1, 1, 1] [2020-10-23 21:45:36,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 21:45:36,250 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:36,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:36,251 INFO L82 PathProgramCache]: Analyzing trace with hash 863955772, now seen corresponding path program 17 times [2020-10-23 21:45:36,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:36,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643509840] [2020-10-23 21:45:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:37,028 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:37,030 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:37,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:37,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:39,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643509840] [2020-10-23 21:45:39,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:39,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-10-23 21:45:39,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112104911] [2020-10-23 21:45:39,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-23 21:45:39,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:39,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-23 21:45:39,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 21:45:39,652 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 41 states. [2020-10-23 21:45:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:42,409 INFO L93 Difference]: Finished difference Result 211 states and 221 transitions. [2020-10-23 21:45:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-23 21:45:42,409 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 151 [2020-10-23 21:45:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:42,411 INFO L225 Difference]: With dead ends: 211 [2020-10-23 21:45:42,411 INFO L226 Difference]: Without dead ends: 172 [2020-10-23 21:45:42,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-10-23 21:45:42,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-23 21:45:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-10-23 21:45:42,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-23 21:45:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-10-23 21:45:42,444 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-10-23 21:45:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:42,445 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-10-23 21:45:42,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-23 21:45:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-10-23 21:45:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-23 21:45:42,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:42,447 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 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, 1, 1, 1, 1, 1] [2020-10-23 21:45:42,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 21:45:42,447 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:42,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:42,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1818939656, now seen corresponding path program 18 times [2020-10-23 21:45:42,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:42,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329282525] [2020-10-23 21:45:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:43,198 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:43,200 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:43,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:43,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:46,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329282525] [2020-10-23 21:45:46,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:46,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-10-23 21:45:46,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391255847] [2020-10-23 21:45:46,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-23 21:45:46,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:46,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-23 21:45:46,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-10-23 21:45:46,095 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 43 states. [2020-10-23 21:45:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:49,246 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2020-10-23 21:45:49,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-23 21:45:49,247 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 157 [2020-10-23 21:45:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:49,249 INFO L225 Difference]: With dead ends: 217 [2020-10-23 21:45:49,250 INFO L226 Difference]: Without dead ends: 178 [2020-10-23 21:45:49,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-10-23 21:45:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-23 21:45:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-10-23 21:45:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-23 21:45:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-10-23 21:45:49,275 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-10-23 21:45:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:49,275 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-10-23 21:45:49,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-23 21:45:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-10-23 21:45:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-23 21:45:49,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:49,276 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 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, 1, 1, 1, 1, 1] [2020-10-23 21:45:49,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 21:45:49,277 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:49,277 INFO L82 PathProgramCache]: Analyzing trace with hash 633386420, now seen corresponding path program 19 times [2020-10-23 21:45:49,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:49,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192041265] [2020-10-23 21:45:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:50,012 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:50,014 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:50,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:50,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:53,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192041265] [2020-10-23 21:45:53,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:53,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-10-23 21:45:53,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801999662] [2020-10-23 21:45:53,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-23 21:45:53,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:53,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-23 21:45:53,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 21:45:53,174 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 45 states. [2020-10-23 21:45:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:56,544 INFO L93 Difference]: Finished difference Result 223 states and 233 transitions. [2020-10-23 21:45:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-23 21:45:56,548 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 163 [2020-10-23 21:45:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:56,549 INFO L225 Difference]: With dead ends: 223 [2020-10-23 21:45:56,549 INFO L226 Difference]: Without dead ends: 184 [2020-10-23 21:45:56,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-10-23 21:45:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-23 21:45:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-10-23 21:45:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-23 21:45:56,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-10-23 21:45:56,572 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-10-23 21:45:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:56,573 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-10-23 21:45:56,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-23 21:45:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-10-23 21:45:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-23 21:45:56,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:56,574 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 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, 1, 1, 1, 1, 1] [2020-10-23 21:45:56,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 21:45:56,575 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:56,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2017247376, now seen corresponding path program 20 times [2020-10-23 21:45:56,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:56,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268684238] [2020-10-23 21:45:56,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:57,350 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:45:57,353 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:57,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:57,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:45:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:00,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268684238] [2020-10-23 21:46:00,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:00,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-10-23 21:46:00,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879054613] [2020-10-23 21:46:00,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-23 21:46:00,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:00,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-23 21:46:00,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 21:46:00,769 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 47 states. [2020-10-23 21:46:04,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:04,512 INFO L93 Difference]: Finished difference Result 229 states and 239 transitions. [2020-10-23 21:46:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-23 21:46:04,513 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 169 [2020-10-23 21:46:04,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:04,514 INFO L225 Difference]: With dead ends: 229 [2020-10-23 21:46:04,514 INFO L226 Difference]: Without dead ends: 190 [2020-10-23 21:46:04,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-10-23 21:46:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-23 21:46:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-10-23 21:46:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-23 21:46:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-10-23 21:46:04,545 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-10-23 21:46:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:04,545 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-10-23 21:46:04,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-23 21:46:04,545 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-10-23 21:46:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-23 21:46:04,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:04,547 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 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, 1, 1, 1, 1, 1] [2020-10-23 21:46:04,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-23 21:46:04,547 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash -284259284, now seen corresponding path program 21 times [2020-10-23 21:46:04,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:04,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294691473] [2020-10-23 21:46:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:05,333 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:05,334 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:05,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:05,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:46:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:09,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294691473] [2020-10-23 21:46:09,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:09,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-10-23 21:46:09,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99228026] [2020-10-23 21:46:09,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-23 21:46:09,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:09,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-23 21:46:09,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-10-23 21:46:09,073 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 49 states. [2020-10-23 21:46:12,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:12,980 INFO L93 Difference]: Finished difference Result 235 states and 245 transitions. [2020-10-23 21:46:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-23 21:46:12,981 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 175 [2020-10-23 21:46:12,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:12,984 INFO L225 Difference]: With dead ends: 235 [2020-10-23 21:46:12,984 INFO L226 Difference]: Without dead ends: 196 [2020-10-23 21:46:12,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-10-23 21:46:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-23 21:46:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-10-23 21:46:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-23 21:46:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-10-23 21:46:13,014 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-10-23 21:46:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:13,014 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-10-23 21:46:13,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-23 21:46:13,015 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-10-23 21:46:13,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-23 21:46:13,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:13,016 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 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, 1, 1, 1, 1, 1] [2020-10-23 21:46:13,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-23 21:46:13,016 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:13,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:13,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1530635288, now seen corresponding path program 22 times [2020-10-23 21:46:13,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:13,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221263130] [2020-10-23 21:46:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:13,818 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:13,820 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:13,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:13,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:46:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:17,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221263130] [2020-10-23 21:46:17,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:17,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-10-23 21:46:17,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991959243] [2020-10-23 21:46:17,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-23 21:46:17,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:17,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-23 21:46:17,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-10-23 21:46:17,834 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 51 states. [2020-10-23 21:46:22,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:22,253 INFO L93 Difference]: Finished difference Result 241 states and 251 transitions. [2020-10-23 21:46:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-23 21:46:22,254 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 181 [2020-10-23 21:46:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:22,256 INFO L225 Difference]: With dead ends: 241 [2020-10-23 21:46:22,257 INFO L226 Difference]: Without dead ends: 202 [2020-10-23 21:46:22,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-10-23 21:46:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-23 21:46:22,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-10-23 21:46:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-23 21:46:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-10-23 21:46:22,297 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-10-23 21:46:22,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:22,298 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-10-23 21:46:22,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-23 21:46:22,298 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-10-23 21:46:22,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-23 21:46:22,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:22,299 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 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, 1, 1, 1, 1, 1] [2020-10-23 21:46:22,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-23 21:46:22,300 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:22,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2118750556, now seen corresponding path program 23 times [2020-10-23 21:46:22,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:22,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549552708] [2020-10-23 21:46:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:23,136 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:23,138 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:23,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:23,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:46:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:27,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549552708] [2020-10-23 21:46:27,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:27,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-10-23 21:46:27,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215798268] [2020-10-23 21:46:27,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-23 21:46:27,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:27,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-23 21:46:27,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-10-23 21:46:27,538 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 53 states. [2020-10-23 21:46:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:32,316 INFO L93 Difference]: Finished difference Result 247 states and 257 transitions. [2020-10-23 21:46:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-23 21:46:32,317 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 187 [2020-10-23 21:46:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:32,319 INFO L225 Difference]: With dead ends: 247 [2020-10-23 21:46:32,319 INFO L226 Difference]: Without dead ends: 208 [2020-10-23 21:46:32,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-10-23 21:46:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-23 21:46:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-10-23 21:46:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-23 21:46:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-10-23 21:46:32,361 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-10-23 21:46:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:32,362 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-10-23 21:46:32,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-23 21:46:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-10-23 21:46:32,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-23 21:46:32,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:32,363 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 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, 1, 1, 1, 1, 1] [2020-10-23 21:46:32,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-23 21:46:32,364 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:32,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1785103456, now seen corresponding path program 24 times [2020-10-23 21:46:32,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:32,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903787548] [2020-10-23 21:46:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:33,175 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:33,176 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:33,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:33,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:46:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:37,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903787548] [2020-10-23 21:46:37,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:37,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-10-23 21:46:37,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411851314] [2020-10-23 21:46:37,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-23 21:46:37,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:37,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-23 21:46:37,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 21:46:37,929 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 55 states. [2020-10-23 21:46:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:43,394 INFO L93 Difference]: Finished difference Result 253 states and 263 transitions. [2020-10-23 21:46:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-23 21:46:43,395 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 193 [2020-10-23 21:46:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:43,397 INFO L225 Difference]: With dead ends: 253 [2020-10-23 21:46:43,397 INFO L226 Difference]: Without dead ends: 214 [2020-10-23 21:46:43,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-10-23 21:46:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-23 21:46:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-10-23 21:46:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-23 21:46:43,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-10-23 21:46:43,438 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-10-23 21:46:43,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:43,438 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-10-23 21:46:43,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-23 21:46:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-10-23 21:46:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-23 21:46:43,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:43,440 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 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, 1, 1, 1, 1, 1] [2020-10-23 21:46:43,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-23 21:46:43,440 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:43,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:43,441 INFO L82 PathProgramCache]: Analyzing trace with hash -888775396, now seen corresponding path program 25 times [2020-10-23 21:46:43,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:43,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230397682] [2020-10-23 21:46:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:44,256 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:44,257 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:44,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:44,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:46:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:49,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230397682] [2020-10-23 21:46:49,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:49,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-10-23 21:46:49,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636306761] [2020-10-23 21:46:49,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-23 21:46:49,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:49,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-23 21:46:49,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-10-23 21:46:49,390 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 57 states. [2020-10-23 21:46:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:54,795 INFO L93 Difference]: Finished difference Result 259 states and 269 transitions. [2020-10-23 21:46:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-23 21:46:54,796 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 199 [2020-10-23 21:46:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:54,798 INFO L225 Difference]: With dead ends: 259 [2020-10-23 21:46:54,799 INFO L226 Difference]: Without dead ends: 220 [2020-10-23 21:46:54,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-10-23 21:46:54,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-23 21:46:54,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-10-23 21:46:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-23 21:46:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-10-23 21:46:54,844 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-10-23 21:46:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:54,844 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-10-23 21:46:54,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-23 21:46:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-10-23 21:46:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-23 21:46:54,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:54,846 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 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, 1, 1, 1, 1, 1] [2020-10-23 21:46:54,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-23 21:46:54,846 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:54,847 INFO L82 PathProgramCache]: Analyzing trace with hash 326613208, now seen corresponding path program 26 times [2020-10-23 21:46:54,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:54,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710600997] [2020-10-23 21:46:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:55,668 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:55,670 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:55,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:55,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:46:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:01,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710600997] [2020-10-23 21:47:01,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:01,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2020-10-23 21:47:01,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399800157] [2020-10-23 21:47:01,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-23 21:47:01,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:01,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-23 21:47:01,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-10-23 21:47:01,335 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 59 states. [2020-10-23 21:47:07,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:07,277 INFO L93 Difference]: Finished difference Result 265 states and 275 transitions. [2020-10-23 21:47:07,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-23 21:47:07,279 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 205 [2020-10-23 21:47:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:07,281 INFO L225 Difference]: With dead ends: 265 [2020-10-23 21:47:07,281 INFO L226 Difference]: Without dead ends: 226 [2020-10-23 21:47:07,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-10-23 21:47:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-23 21:47:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-10-23 21:47:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-23 21:47:07,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-10-23 21:47:07,322 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-10-23 21:47:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:07,322 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-10-23 21:47:07,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-23 21:47:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-10-23 21:47:07,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-23 21:47:07,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:07,324 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 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, 1, 1, 1, 1, 1] [2020-10-23 21:47:07,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-23 21:47:07,324 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:07,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:07,325 INFO L82 PathProgramCache]: Analyzing trace with hash 860641172, now seen corresponding path program 27 times [2020-10-23 21:47:07,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:07,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611794743] [2020-10-23 21:47:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:08,208 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:08,209 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:08,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:08,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:47:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:14,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611794743] [2020-10-23 21:47:14,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:14,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2020-10-23 21:47:14,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746364533] [2020-10-23 21:47:14,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-23 21:47:14,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-23 21:47:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-10-23 21:47:14,223 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 61 states. [2020-10-23 21:47:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:20,786 INFO L93 Difference]: Finished difference Result 271 states and 281 transitions. [2020-10-23 21:47:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-23 21:47:20,788 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 211 [2020-10-23 21:47:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:20,790 INFO L225 Difference]: With dead ends: 271 [2020-10-23 21:47:20,790 INFO L226 Difference]: Without dead ends: 232 [2020-10-23 21:47:20,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-10-23 21:47:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-23 21:47:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-10-23 21:47:20,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-23 21:47:20,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-10-23 21:47:20,836 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-10-23 21:47:20,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:20,836 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-10-23 21:47:20,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-23 21:47:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-10-23 21:47:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-23 21:47:20,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:20,838 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 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, 1, 1, 1, 1, 1] [2020-10-23 21:47:20,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-23 21:47:20,838 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:20,839 INFO L82 PathProgramCache]: Analyzing trace with hash 365295952, now seen corresponding path program 28 times [2020-10-23 21:47:20,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:20,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511123380] [2020-10-23 21:47:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:21,708 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:21,710 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:21,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:21,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:47:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:28,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511123380] [2020-10-23 21:47:28,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:28,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-10-23 21:47:28,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359192868] [2020-10-23 21:47:28,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-23 21:47:28,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:28,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-23 21:47:28,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-10-23 21:47:28,198 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 63 states. [2020-10-23 21:47:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:35,085 INFO L93 Difference]: Finished difference Result 277 states and 287 transitions. [2020-10-23 21:47:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-23 21:47:35,087 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 217 [2020-10-23 21:47:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:35,089 INFO L225 Difference]: With dead ends: 277 [2020-10-23 21:47:35,089 INFO L226 Difference]: Without dead ends: 238 [2020-10-23 21:47:35,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-10-23 21:47:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-23 21:47:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-10-23 21:47:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-23 21:47:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-10-23 21:47:35,135 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-10-23 21:47:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:35,135 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-10-23 21:47:35,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-23 21:47:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-10-23 21:47:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-23 21:47:35,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:35,137 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 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, 1, 1, 1, 1, 1] [2020-10-23 21:47:35,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-23 21:47:35,137 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash 500588044, now seen corresponding path program 29 times [2020-10-23 21:47:35,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:35,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568584667] [2020-10-23 21:47:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:36,011 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:36,013 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:36,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:36,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:47:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:42,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568584667] [2020-10-23 21:47:42,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:42,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2020-10-23 21:47:42,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674078509] [2020-10-23 21:47:42,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-23 21:47:42,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:42,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-23 21:47:42,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-10-23 21:47:42,846 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 65 states. [2020-10-23 21:47:49,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:49,714 INFO L93 Difference]: Finished difference Result 283 states and 293 transitions. [2020-10-23 21:47:49,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-23 21:47:49,715 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 223 [2020-10-23 21:47:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:49,717 INFO L225 Difference]: With dead ends: 283 [2020-10-23 21:47:49,718 INFO L226 Difference]: Without dead ends: 244 [2020-10-23 21:47:49,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-10-23 21:47:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-23 21:47:49,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-10-23 21:47:49,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-23 21:47:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-10-23 21:47:49,766 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-10-23 21:47:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:49,766 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-10-23 21:47:49,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-23 21:47:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-10-23 21:47:49,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-23 21:47:49,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:49,768 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 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, 1, 1, 1, 1, 1] [2020-10-23 21:47:49,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-23 21:47:49,768 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:49,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:49,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1575008824, now seen corresponding path program 30 times [2020-10-23 21:47:49,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:49,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822686955] [2020-10-23 21:47:49,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:50,682 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:50,694 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:50,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:50,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:47:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:58,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822686955] [2020-10-23 21:47:58,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:58,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2020-10-23 21:47:58,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772203186] [2020-10-23 21:47:58,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-23 21:47:58,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:58,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-23 21:47:58,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-10-23 21:47:58,130 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 67 states. [2020-10-23 21:48:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:06,070 INFO L93 Difference]: Finished difference Result 289 states and 299 transitions. [2020-10-23 21:48:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-10-23 21:48:06,071 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 229 [2020-10-23 21:48:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:06,073 INFO L225 Difference]: With dead ends: 289 [2020-10-23 21:48:06,074 INFO L226 Difference]: Without dead ends: 250 [2020-10-23 21:48:06,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-10-23 21:48:06,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-23 21:48:06,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-10-23 21:48:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-23 21:48:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-10-23 21:48:06,109 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-10-23 21:48:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:06,109 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-10-23 21:48:06,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-23 21:48:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-10-23 21:48:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-23 21:48:06,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:06,110 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 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, 1, 1, 1, 1, 1] [2020-10-23 21:48:06,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-23 21:48:06,110 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:06,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1760718980, now seen corresponding path program 31 times [2020-10-23 21:48:06,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:06,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076955639] [2020-10-23 21:48:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:07,050 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:07,051 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:07,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:07,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:48:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:14,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076955639] [2020-10-23 21:48:14,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:14,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2020-10-23 21:48:14,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580801173] [2020-10-23 21:48:14,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-23 21:48:14,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:14,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-23 21:48:14,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-10-23 21:48:14,853 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 69 states. [2020-10-23 21:48:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:22,955 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2020-10-23 21:48:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-10-23 21:48:22,958 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 235 [2020-10-23 21:48:22,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:22,960 INFO L225 Difference]: With dead ends: 295 [2020-10-23 21:48:22,960 INFO L226 Difference]: Without dead ends: 256 [2020-10-23 21:48:22,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-10-23 21:48:22,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-23 21:48:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-10-23 21:48:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-23 21:48:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-10-23 21:48:23,005 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-10-23 21:48:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:23,005 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-10-23 21:48:23,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-23 21:48:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-10-23 21:48:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-23 21:48:23,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:23,007 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 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, 1, 1, 1, 1, 1] [2020-10-23 21:48:23,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-23 21:48:23,007 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:23,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:23,007 INFO L82 PathProgramCache]: Analyzing trace with hash 609328704, now seen corresponding path program 32 times [2020-10-23 21:48:23,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:23,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214577770] [2020-10-23 21:48:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:24,000 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:24,002 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:24,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:24,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:48:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:32,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214577770] [2020-10-23 21:48:32,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:32,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2020-10-23 21:48:32,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164920817] [2020-10-23 21:48:32,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-23 21:48:32,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:32,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-23 21:48:32,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-10-23 21:48:32,491 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 71 states. [2020-10-23 21:48:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:42,763 INFO L93 Difference]: Finished difference Result 301 states and 311 transitions. [2020-10-23 21:48:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-10-23 21:48:42,765 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 241 [2020-10-23 21:48:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:42,767 INFO L225 Difference]: With dead ends: 301 [2020-10-23 21:48:42,767 INFO L226 Difference]: Without dead ends: 262 [2020-10-23 21:48:42,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-10-23 21:48:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-23 21:48:42,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-10-23 21:48:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-23 21:48:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-10-23 21:48:42,833 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-10-23 21:48:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:42,833 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-10-23 21:48:42,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-23 21:48:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-10-23 21:48:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-23 21:48:42,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:42,835 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 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, 1, 1, 1, 1, 1] [2020-10-23 21:48:42,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-23 21:48:42,836 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:42,836 INFO L82 PathProgramCache]: Analyzing trace with hash -303132932, now seen corresponding path program 33 times [2020-10-23 21:48:42,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:42,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086253545] [2020-10-23 21:48:42,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:43,741 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:43,743 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:43,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:43,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:48:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:52,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086253545] [2020-10-23 21:48:52,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:52,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2020-10-23 21:48:52,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931308184] [2020-10-23 21:48:52,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-23 21:48:52,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-23 21:48:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-10-23 21:48:52,361 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 73 states. [2020-10-23 21:49:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:02,323 INFO L93 Difference]: Finished difference Result 307 states and 317 transitions. [2020-10-23 21:49:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-10-23 21:49:02,325 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 247 [2020-10-23 21:49:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:02,327 INFO L225 Difference]: With dead ends: 307 [2020-10-23 21:49:02,327 INFO L226 Difference]: Without dead ends: 268 [2020-10-23 21:49:02,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-10-23 21:49:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-23 21:49:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-10-23 21:49:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-23 21:49:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-10-23 21:49:02,389 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-10-23 21:49:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:02,390 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-10-23 21:49:02,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-23 21:49:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-10-23 21:49:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-23 21:49:02,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:02,392 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 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, 1, 1, 1, 1, 1] [2020-10-23 21:49:02,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-23 21:49:02,392 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:02,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1020591432, now seen corresponding path program 34 times [2020-10-23 21:49:02,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:02,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621305412] [2020-10-23 21:49:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:03,263 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:03,265 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:03,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:03,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:49:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:12,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621305412] [2020-10-23 21:49:12,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:12,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2020-10-23 21:49:12,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486878032] [2020-10-23 21:49:12,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-23 21:49:12,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:12,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-23 21:49:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-10-23 21:49:12,171 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 75 states. [2020-10-23 21:49:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:21,988 INFO L93 Difference]: Finished difference Result 313 states and 323 transitions. [2020-10-23 21:49:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-10-23 21:49:21,990 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 253 [2020-10-23 21:49:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:21,992 INFO L225 Difference]: With dead ends: 313 [2020-10-23 21:49:21,992 INFO L226 Difference]: Without dead ends: 274 [2020-10-23 21:49:21,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-10-23 21:49:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-23 21:49:22,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-10-23 21:49:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-23 21:49:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-10-23 21:49:22,032 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-10-23 21:49:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:22,033 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-10-23 21:49:22,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-23 21:49:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-10-23 21:49:22,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-23 21:49:22,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:22,035 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 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, 1, 1, 1, 1, 1] [2020-10-23 21:49:22,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-23 21:49:22,035 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:22,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:22,036 INFO L82 PathProgramCache]: Analyzing trace with hash 18397556, now seen corresponding path program 35 times [2020-10-23 21:49:22,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:22,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309440158] [2020-10-23 21:49:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:22,918 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:22,919 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:23,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:23,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:49:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:32,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309440158] [2020-10-23 21:49:32,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:32,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2020-10-23 21:49:32,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890828162] [2020-10-23 21:49:32,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-23 21:49:32,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:32,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-23 21:49:32,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-10-23 21:49:32,673 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 77 states. [2020-10-23 21:49:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:44,273 INFO L93 Difference]: Finished difference Result 319 states and 329 transitions. [2020-10-23 21:49:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-10-23 21:49:44,275 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 259 [2020-10-23 21:49:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:44,277 INFO L225 Difference]: With dead ends: 319 [2020-10-23 21:49:44,277 INFO L226 Difference]: Without dead ends: 280 [2020-10-23 21:49:44,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-10-23 21:49:44,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-23 21:49:44,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-10-23 21:49:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-23 21:49:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-10-23 21:49:44,330 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-10-23 21:49:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:44,330 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-10-23 21:49:44,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-23 21:49:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-10-23 21:49:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-23 21:49:44,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:44,331 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 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, 1, 1, 1, 1, 1] [2020-10-23 21:49:44,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-23 21:49:44,332 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:44,332 INFO L82 PathProgramCache]: Analyzing trace with hash -528911568, now seen corresponding path program 36 times [2020-10-23 21:49:44,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:44,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123752395] [2020-10-23 21:49:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:45,287 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:45,288 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:45,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:45,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:49:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:55,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123752395] [2020-10-23 21:49:55,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:55,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2020-10-23 21:49:55,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277125087] [2020-10-23 21:49:55,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-23 21:49:55,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:55,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-23 21:49:55,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-10-23 21:49:55,769 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 79 states. [2020-10-23 21:50:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:08,020 INFO L93 Difference]: Finished difference Result 325 states and 335 transitions. [2020-10-23 21:50:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-10-23 21:50:08,021 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 265 [2020-10-23 21:50:08,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:08,023 INFO L225 Difference]: With dead ends: 325 [2020-10-23 21:50:08,024 INFO L226 Difference]: Without dead ends: 286 [2020-10-23 21:50:08,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-10-23 21:50:08,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-23 21:50:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-10-23 21:50:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-23 21:50:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-10-23 21:50:08,091 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-10-23 21:50:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:08,092 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-10-23 21:50:08,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-23 21:50:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-10-23 21:50:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-23 21:50:08,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:08,094 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 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, 1, 1, 1, 1, 1] [2020-10-23 21:50:08,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-23 21:50:08,094 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:08,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:08,095 INFO L82 PathProgramCache]: Analyzing trace with hash -239144980, now seen corresponding path program 37 times [2020-10-23 21:50:08,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:08,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411206510] [2020-10-23 21:50:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:09,103 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:09,105 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:09,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:09,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:50:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:50:20,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411206510] [2020-10-23 21:50:20,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:20,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2020-10-23 21:50:20,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515569861] [2020-10-23 21:50:20,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-23 21:50:20,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:20,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-23 21:50:20,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-10-23 21:50:20,274 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 81 states. [2020-10-23 21:50:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:33,803 INFO L93 Difference]: Finished difference Result 331 states and 341 transitions. [2020-10-23 21:50:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-10-23 21:50:33,804 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 271 [2020-10-23 21:50:33,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:33,806 INFO L225 Difference]: With dead ends: 331 [2020-10-23 21:50:33,806 INFO L226 Difference]: Without dead ends: 292 [2020-10-23 21:50:33,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-10-23 21:50:33,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-23 21:50:33,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-10-23 21:50:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-23 21:50:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-10-23 21:50:33,865 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-10-23 21:50:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:33,865 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-10-23 21:50:33,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-23 21:50:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-10-23 21:50:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-23 21:50:33,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:33,867 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 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, 1, 1, 1, 1, 1] [2020-10-23 21:50:33,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-23 21:50:33,867 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:33,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1727336536, now seen corresponding path program 38 times [2020-10-23 21:50:33,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:33,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666872456] [2020-10-23 21:50:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:34,860 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:34,862 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:35,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:35,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:50:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:50:46,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666872456] [2020-10-23 21:50:46,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:46,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2020-10-23 21:50:46,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147419699] [2020-10-23 21:50:46,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-23 21:50:46,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-23 21:50:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-10-23 21:50:46,889 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 83 states. [2020-10-23 21:51:00,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:00,365 INFO L93 Difference]: Finished difference Result 337 states and 347 transitions. [2020-10-23 21:51:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-10-23 21:51:00,367 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 277 [2020-10-23 21:51:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:00,370 INFO L225 Difference]: With dead ends: 337 [2020-10-23 21:51:00,370 INFO L226 Difference]: Without dead ends: 298 [2020-10-23 21:51:00,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-10-23 21:51:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-23 21:51:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-10-23 21:51:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-23 21:51:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-10-23 21:51:00,448 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-10-23 21:51:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:00,449 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-10-23 21:51:00,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-23 21:51:00,449 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-10-23 21:51:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-23 21:51:00,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:00,451 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 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, 1, 1, 1, 1, 1] [2020-10-23 21:51:00,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-23 21:51:00,451 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:00,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:00,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1976618396, now seen corresponding path program 39 times [2020-10-23 21:51:00,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:00,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189414258] [2020-10-23 21:51:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:01,547 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:01,548 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:01,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:01,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:51:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:51:14,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189414258] [2020-10-23 21:51:14,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:14,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2020-10-23 21:51:14,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963007812] [2020-10-23 21:51:14,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-23 21:51:14,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:14,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-23 21:51:14,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-10-23 21:51:14,717 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 85 states. [2020-10-23 21:51:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:29,494 INFO L93 Difference]: Finished difference Result 343 states and 353 transitions. [2020-10-23 21:51:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-10-23 21:51:29,496 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 283 [2020-10-23 21:51:29,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:29,498 INFO L225 Difference]: With dead ends: 343 [2020-10-23 21:51:29,498 INFO L226 Difference]: Without dead ends: 304 [2020-10-23 21:51:29,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-10-23 21:51:29,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-23 21:51:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-10-23 21:51:29,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-23 21:51:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-10-23 21:51:29,577 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-10-23 21:51:29,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:29,577 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-10-23 21:51:29,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-23 21:51:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-10-23 21:51:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-23 21:51:29,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:29,579 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 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, 1, 1, 1, 1, 1] [2020-10-23 21:51:29,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-23 21:51:29,580 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:29,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:29,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1152219168, now seen corresponding path program 40 times [2020-10-23 21:51:29,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:29,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311818835] [2020-10-23 21:51:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:30,677 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:30,678 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:30,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:30,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:51:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:51:45,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311818835] [2020-10-23 21:51:45,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:45,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2020-10-23 21:51:45,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833608281] [2020-10-23 21:51:45,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-10-23 21:51:45,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:45,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-10-23 21:51:45,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-10-23 21:51:45,132 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 87 states. [2020-10-23 21:52:01,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:52:01,067 INFO L93 Difference]: Finished difference Result 349 states and 359 transitions. [2020-10-23 21:52:01,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-10-23 21:52:01,069 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 289 [2020-10-23 21:52:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:52:01,071 INFO L225 Difference]: With dead ends: 349 [2020-10-23 21:52:01,071 INFO L226 Difference]: Without dead ends: 310 [2020-10-23 21:52:01,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-10-23 21:52:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-23 21:52:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-10-23 21:52:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-23 21:52:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-10-23 21:52:01,138 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-10-23 21:52:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:52:01,138 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-10-23 21:52:01,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-10-23 21:52:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-10-23 21:52:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-23 21:52:01,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:52:01,140 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 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, 1, 1, 1, 1, 1] [2020-10-23 21:52:01,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-23 21:52:01,141 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:52:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:52:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1883799332, now seen corresponding path program 41 times [2020-10-23 21:52:01,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:52:01,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152203676] [2020-10-23 21:52:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:52:02,284 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:52:02,286 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:52:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:02,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:52:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:02,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:52:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:52:18,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152203676] [2020-10-23 21:52:18,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:18,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2020-10-23 21:52:18,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261387962] [2020-10-23 21:52:18,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-10-23 21:52:18,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:18,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-10-23 21:52:18,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-10-23 21:52:18,567 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 89 states. [2020-10-23 21:52:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:52:35,506 INFO L93 Difference]: Finished difference Result 355 states and 365 transitions. [2020-10-23 21:52:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-10-23 21:52:35,509 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 295 [2020-10-23 21:52:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:52:35,511 INFO L225 Difference]: With dead ends: 355 [2020-10-23 21:52:35,511 INFO L226 Difference]: Without dead ends: 316 [2020-10-23 21:52:35,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-10-23 21:52:35,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-23 21:52:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-10-23 21:52:35,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-23 21:52:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-10-23 21:52:35,584 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-10-23 21:52:35,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:52:35,584 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-10-23 21:52:35,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-10-23 21:52:35,584 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-10-23 21:52:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-23 21:52:35,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:52:35,585 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 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, 1, 1, 1, 1, 1] [2020-10-23 21:52:35,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-23 21:52:35,586 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:52:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:52:35,586 INFO L82 PathProgramCache]: Analyzing trace with hash -164688744, now seen corresponding path program 42 times [2020-10-23 21:52:35,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:52:35,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553207852] [2020-10-23 21:52:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:52:36,744 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:52:36,745 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:52:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:36,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:52:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:36,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:52:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:52:54,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553207852] [2020-10-23 21:52:54,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:54,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2020-10-23 21:52:54,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487940799] [2020-10-23 21:52:54,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-10-23 21:52:54,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:54,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-10-23 21:52:54,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-10-23 21:52:54,400 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 91 states. [2020-10-23 21:53:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:53:15,300 INFO L93 Difference]: Finished difference Result 361 states and 371 transitions. [2020-10-23 21:53:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-10-23 21:53:15,303 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 301 [2020-10-23 21:53:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:53:15,306 INFO L225 Difference]: With dead ends: 361 [2020-10-23 21:53:15,306 INFO L226 Difference]: Without dead ends: 322 [2020-10-23 21:53:15,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-10-23 21:53:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-23 21:53:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-10-23 21:53:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-23 21:53:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-10-23 21:53:15,392 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-10-23 21:53:15,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:53:15,392 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-10-23 21:53:15,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-10-23 21:53:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-10-23 21:53:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-23 21:53:15,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:53:15,394 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 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, 1, 1, 1, 1, 1] [2020-10-23 21:53:15,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-23 21:53:15,394 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:53:15,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:53:15,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1118165844, now seen corresponding path program 43 times [2020-10-23 21:53:15,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:53:15,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373088156] [2020-10-23 21:53:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:53:16,702 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:53:16,704 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:53:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:16,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:53:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:16,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:53:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:53:36,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373088156] [2020-10-23 21:53:36,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:53:36,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2020-10-23 21:53:36,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232602734] [2020-10-23 21:53:36,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-10-23 21:53:36,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:53:36,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-10-23 21:53:36,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-10-23 21:53:36,150 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 93 states. [2020-10-23 21:53:58,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:53:58,089 INFO L93 Difference]: Finished difference Result 367 states and 377 transitions. [2020-10-23 21:53:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-10-23 21:53:58,092 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 307 [2020-10-23 21:53:58,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:53:58,094 INFO L225 Difference]: With dead ends: 367 [2020-10-23 21:53:58,094 INFO L226 Difference]: Without dead ends: 328 [2020-10-23 21:53:58,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-10-23 21:53:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-23 21:53:58,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-10-23 21:53:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-23 21:53:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-10-23 21:53:58,185 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-10-23 21:53:58,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:53:58,185 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-10-23 21:53:58,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-10-23 21:53:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-10-23 21:53:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-23 21:53:58,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:53:58,187 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 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, 1, 1, 1, 1, 1] [2020-10-23 21:53:58,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-23 21:53:58,188 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:53:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:53:58,188 INFO L82 PathProgramCache]: Analyzing trace with hash -77746928, now seen corresponding path program 44 times [2020-10-23 21:53:58,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:53:58,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933834093] [2020-10-23 21:53:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:53:59,463 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:53:59,465 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:53:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:59,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:53:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:59,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:53:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:54:20,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933834093] [2020-10-23 21:54:20,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:54:20,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2020-10-23 21:54:20,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543676008] [2020-10-23 21:54:20,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-10-23 21:54:20,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:54:20,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-10-23 21:54:20,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-10-23 21:54:20,910 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 95 states. [2020-10-23 21:54:45,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:54:45,774 INFO L93 Difference]: Finished difference Result 373 states and 383 transitions. [2020-10-23 21:54:45,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-10-23 21:54:45,777 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 313 [2020-10-23 21:54:45,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:54:45,779 INFO L225 Difference]: With dead ends: 373 [2020-10-23 21:54:45,780 INFO L226 Difference]: Without dead ends: 334 [2020-10-23 21:54:45,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-10-23 21:54:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-23 21:54:45,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-10-23 21:54:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-23 21:54:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-10-23 21:54:45,863 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-10-23 21:54:45,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:54:45,863 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-10-23 21:54:45,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-10-23 21:54:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-10-23 21:54:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-23 21:54:45,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:54:45,865 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 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, 1, 1, 1, 1, 1] [2020-10-23 21:54:45,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-23 21:54:45,866 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:54:45,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:54:45,866 INFO L82 PathProgramCache]: Analyzing trace with hash -565689908, now seen corresponding path program 45 times [2020-10-23 21:54:45,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:54:45,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980288171] [2020-10-23 21:54:45,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:54:45,977 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:54:47,233 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:54:47,235 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:54:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:47,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:54:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:47,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:54:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:55:11,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980288171] [2020-10-23 21:55:11,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:55:11,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2020-10-23 21:55:11,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640330484] [2020-10-23 21:55:11,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-10-23 21:55:11,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:55:11,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-10-23 21:55:11,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-10-23 21:55:11,076 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 97 states. [2020-10-23 21:55:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:55:35,504 INFO L93 Difference]: Finished difference Result 379 states and 389 transitions. [2020-10-23 21:55:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-10-23 21:55:35,507 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 319 [2020-10-23 21:55:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:55:35,509 INFO L225 Difference]: With dead ends: 379 [2020-10-23 21:55:35,510 INFO L226 Difference]: Without dead ends: 340 [2020-10-23 21:55:35,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-10-23 21:55:35,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-23 21:55:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-10-23 21:55:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-23 21:55:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-10-23 21:55:35,571 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-10-23 21:55:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:55:35,571 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-10-23 21:55:35,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-10-23 21:55:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-10-23 21:55:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-23 21:55:35,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:55:35,572 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 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, 1, 1, 1, 1, 1] [2020-10-23 21:55:35,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-23 21:55:35,573 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:55:35,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:55:35,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1560762760, now seen corresponding path program 46 times [2020-10-23 21:55:35,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:55:35,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327988716] [2020-10-23 21:55:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:55:36,974 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:55:36,976 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:55:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:37,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:55:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:37,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:55:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:56:04,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327988716] [2020-10-23 21:56:04,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:56:04,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2020-10-23 21:56:04,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323766137] [2020-10-23 21:56:04,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-10-23 21:56:04,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:56:04,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-10-23 21:56:04,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-10-23 21:56:04,027 INFO L87 Difference]: Start difference. First operand 336 states and 341 transitions. Second operand 99 states. [2020-10-23 21:56:05,171 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-23 21:56:30,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:56:30,135 INFO L93 Difference]: Finished difference Result 385 states and 395 transitions. [2020-10-23 21:56:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-10-23 21:56:30,139 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 325 [2020-10-23 21:56:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:56:30,141 INFO L225 Difference]: With dead ends: 385 [2020-10-23 21:56:30,141 INFO L226 Difference]: Without dead ends: 346 [2020-10-23 21:56:30,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=11489, Invalid=26341, Unknown=0, NotChecked=0, Total=37830 [2020-10-23 21:56:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-23 21:56:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2020-10-23 21:56:30,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-23 21:56:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 347 transitions. [2020-10-23 21:56:30,252 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 347 transitions. Word has length 325 [2020-10-23 21:56:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:56:30,252 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 347 transitions. [2020-10-23 21:56:30,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-10-23 21:56:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 347 transitions. [2020-10-23 21:56:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-23 21:56:30,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:56:30,255 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 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, 1, 1, 1, 1, 1] [2020-10-23 21:56:30,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-23 21:56:30,255 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:56:30,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:56:30,256 INFO L82 PathProgramCache]: Analyzing trace with hash 418165828, now seen corresponding path program 47 times [2020-10-23 21:56:30,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:56:30,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928095040] [2020-10-23 21:56:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:56:30,371 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:56:30,473 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:56:31,791 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:56:31,793 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:56:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:31,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:56:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:31,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:56:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:56:59,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928095040] [2020-10-23 21:56:59,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:56:59,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2020-10-23 21:56:59,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687659001] [2020-10-23 21:56:59,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-10-23 21:56:59,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:56:59,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-10-23 21:56:59,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=7597, Unknown=0, NotChecked=0, Total=10100 [2020-10-23 21:56:59,702 INFO L87 Difference]: Start difference. First operand 342 states and 347 transitions. Second operand 101 states. [2020-10-23 21:57:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:57:28,881 INFO L93 Difference]: Finished difference Result 391 states and 401 transitions. [2020-10-23 21:57:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-10-23 21:57:28,885 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 331 [2020-10-23 21:57:28,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:57:28,889 INFO L225 Difference]: With dead ends: 391 [2020-10-23 21:57:28,889 INFO L226 Difference]: Without dead ends: 352 [2020-10-23 21:57:28,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7194 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=11973, Invalid=27429, Unknown=0, NotChecked=0, Total=39402 [2020-10-23 21:57:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-23 21:57:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2020-10-23 21:57:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-23 21:57:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 353 transitions. [2020-10-23 21:57:28,995 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 353 transitions. Word has length 331 [2020-10-23 21:57:28,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:57:28,995 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 353 transitions. [2020-10-23 21:57:28,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-10-23 21:57:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 353 transitions. [2020-10-23 21:57:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-23 21:57:28,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:57:28,997 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 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, 1, 1, 1, 1, 1] [2020-10-23 21:57:28,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-23 21:57:28,998 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:57:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:57:28,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1593446912, now seen corresponding path program 48 times [2020-10-23 21:57:28,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:57:28,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679502130] [2020-10-23 21:57:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:57:29,111 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 21:57:30,502 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:57:30,503 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:57:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:30,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:57:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:30,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 21:57:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:32,791 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:41,719 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-23 21:57:46,542 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12