/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:24:33,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:24:33,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:24:33,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:24:33,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:24:33,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:24:33,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:24:33,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:24:33,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:24:33,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:24:33,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:24:33,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:24:33,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:24:33,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:24:33,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:24:33,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:24:33,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:24:33,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:24:33,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:24:33,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:24:33,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:24:33,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:24:33,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:24:34,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:24:34,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:24:34,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:24:34,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:24:34,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:24:34,026 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:24:34,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:24:34,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:24:34,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:24:34,057 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:24:34,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:24:34,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:24:34,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:24:34,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:24:34,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:24:34,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:24:34,059 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:24:34,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:24:34,060 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:24:34,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:24:34,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:24:34,061 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:24:34,061 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:24:34,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:24:34,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:24:34,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:24:34,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:24:34,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:24:34,062 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:24:34,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:24:34,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:24:34,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:24:34,525 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:24:34,525 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:24:34,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-11-07 06:24:34,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa2c6a22/51760e9367144306a96e2a386c9dbbec/FLAG7604ed16c [2020-11-07 06:24:35,300 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:24:35,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-11-07 06:24:35,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa2c6a22/51760e9367144306a96e2a386c9dbbec/FLAG7604ed16c [2020-11-07 06:24:35,548 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa2c6a22/51760e9367144306a96e2a386c9dbbec [2020-11-07 06:24:35,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:24:35,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:24:35,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:24:35,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:24:35,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:24:35,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:24:35" (1/1) ... [2020-11-07 06:24:35,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bad714c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:24:35, skipping insertion in model container [2020-11-07 06:24:35,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:24:35" (1/1) ... [2020-11-07 06:24:35,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:24:35,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:24:36,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:24:36,161 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:24:36,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:24:36,425 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:24:36,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:24:36 WrapperNode [2020-11-07 06:24:36,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:24:36,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:24:36,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:24:36,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:24:36,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:24:36" (1/1) ... [2020-11-07 06:24:36,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:24:36" (1/1) ... [2020-11-07 06:24:36,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:24:36" (1/1) ... [2020-11-07 06:24:36,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:24:36" (1/1) ... [2020-11-07 06:24:36,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:24:36" (1/1) ... [2020-11-07 06:24:36,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:24:36" (1/1) ... [2020-11-07 06:24:36,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:24:36" (1/1) ... [2020-11-07 06:24:36,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:24:36,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:24:36,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:24:36,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:24:36,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:24:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:24:36,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:24:36,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:24:36,674 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:24:36,674 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-11-07 06:24:36,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:24:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-11-07 06:24:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:24:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:24:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:24:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:24:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:24:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 06:24:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:24:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:24:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:24:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:24:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:24:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:24:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:24:38,605 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:24:38,605 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:24:38,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:24:38 BoogieIcfgContainer [2020-11-07 06:24:38,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:24:38,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:24:38,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:24:38,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:24:38,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:24:35" (1/3) ... [2020-11-07 06:24:38,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@abcf9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:24:38, skipping insertion in model container [2020-11-07 06:24:38,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:24:36" (2/3) ... [2020-11-07 06:24:38,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@abcf9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:24:38, skipping insertion in model container [2020-11-07 06:24:38,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:24:38" (3/3) ... [2020-11-07 06:24:38,623 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-11-07 06:24:38,640 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:24:38,645 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:24:38,659 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:24:38,698 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:24:38,699 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:24:38,699 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:24:38,699 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:24:38,699 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:24:38,699 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:24:38,699 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:24:38,700 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:24:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states. [2020-11-07 06:24:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-11-07 06:24:38,762 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:24:38,763 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:24:38,764 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:24:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:24:38,772 INFO L82 PathProgramCache]: Analyzing trace with hash -815547167, now seen corresponding path program 1 times [2020-11-07 06:24:38,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:24:38,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055464286] [2020-11-07 06:24:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:24:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:24:39,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:24:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:24:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:24:39,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055464286] [2020-11-07 06:24:39,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:24:39,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:24:39,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790885989] [2020-11-07 06:24:39,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:24:39,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:24:39,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:24:39,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:24:39,283 INFO L87 Difference]: Start difference. First operand 690 states. Second operand 5 states. [2020-11-07 06:24:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:24:44,042 INFO L93 Difference]: Finished difference Result 1779 states and 2507 transitions. [2020-11-07 06:24:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:24:44,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-11-07 06:24:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:24:44,094 INFO L225 Difference]: With dead ends: 1779 [2020-11-07 06:24:44,094 INFO L226 Difference]: Without dead ends: 1034 [2020-11-07 06:24:44,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:24:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2020-11-07 06:24:44,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1004. [2020-11-07 06:24:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2020-11-07 06:24:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1352 transitions. [2020-11-07 06:24:44,352 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1352 transitions. Word has length 69 [2020-11-07 06:24:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:24:44,353 INFO L481 AbstractCegarLoop]: Abstraction has 1004 states and 1352 transitions. [2020-11-07 06:24:44,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:24:44,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1352 transitions. [2020-11-07 06:24:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-11-07 06:24:44,363 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:24:44,364 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:24:44,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:24:44,365 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:24:44,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:24:44,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1317513359, now seen corresponding path program 1 times [2020-11-07 06:24:44,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:24:44,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162287965] [2020-11-07 06:24:44,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:24:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:24:44,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:24:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:24:44,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:24:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:24:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:24:44,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162287965] [2020-11-07 06:24:44,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:24:44,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 06:24:44,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906579107] [2020-11-07 06:24:44,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:24:44,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:24:44,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:24:44,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:24:44,730 INFO L87 Difference]: Start difference. First operand 1004 states and 1352 transitions. Second operand 8 states. [2020-11-07 06:24:49,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:24:49,024 INFO L93 Difference]: Finished difference Result 2238 states and 3084 transitions. [2020-11-07 06:24:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 06:24:49,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 153 [2020-11-07 06:24:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:24:49,042 INFO L225 Difference]: With dead ends: 2238 [2020-11-07 06:24:49,042 INFO L226 Difference]: Without dead ends: 1257 [2020-11-07 06:24:49,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-07 06:24:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2020-11-07 06:24:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1010. [2020-11-07 06:24:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2020-11-07 06:24:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1262 transitions. [2020-11-07 06:24:49,253 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1262 transitions. Word has length 153 [2020-11-07 06:24:49,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:24:49,254 INFO L481 AbstractCegarLoop]: Abstraction has 1010 states and 1262 transitions. [2020-11-07 06:24:49,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:24:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1262 transitions. [2020-11-07 06:24:49,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-11-07 06:24:49,258 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:24:49,258 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:24:49,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:24:49,259 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:24:49,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:24:49,260 INFO L82 PathProgramCache]: Analyzing trace with hash -682981203, now seen corresponding path program 1 times [2020-11-07 06:24:49,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:24:49,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351505125] [2020-11-07 06:24:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:24:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:24:49,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:24:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:24:49,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:24:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:24:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:24:49,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351505125] [2020-11-07 06:24:49,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:24:49,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-07 06:24:49,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246677964] [2020-11-07 06:24:49,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:24:49,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:24:49,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:24:49,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:24:49,579 INFO L87 Difference]: Start difference. First operand 1010 states and 1262 transitions. Second operand 5 states. [2020-11-07 06:24:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:24:53,720 INFO L93 Difference]: Finished difference Result 2720 states and 3503 transitions. [2020-11-07 06:24:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:24:53,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2020-11-07 06:24:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:24:53,741 INFO L225 Difference]: With dead ends: 2720 [2020-11-07 06:24:53,741 INFO L226 Difference]: Without dead ends: 1733 [2020-11-07 06:24:53,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:24:53,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2020-11-07 06:24:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1394. [2020-11-07 06:24:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1394 states. [2020-11-07 06:24:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1734 transitions. [2020-11-07 06:24:53,985 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1734 transitions. Word has length 163 [2020-11-07 06:24:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:24:53,986 INFO L481 AbstractCegarLoop]: Abstraction has 1394 states and 1734 transitions. [2020-11-07 06:24:53,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:24:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1734 transitions. [2020-11-07 06:24:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-11-07 06:24:53,991 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:24:53,992 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:24:53,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:24:53,992 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:24:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:24:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1499721525, now seen corresponding path program 1 times [2020-11-07 06:24:53,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:24:53,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889207321] [2020-11-07 06:24:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:24:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:24:54,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:24:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:24:54,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:24:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:24:54,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-11-07 06:24:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:24:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 117 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:24:55,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889207321] [2020-11-07 06:24:55,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:24:55,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:24:55,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138636037] [2020-11-07 06:24:55,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:24:55,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:24:55,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:24:55,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:24:55,069 INFO L87 Difference]: Start difference. First operand 1394 states and 1734 transitions. Second operand 12 states. [2020-11-07 06:24:55,509 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-11-07 06:24:55,939 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-11-07 06:24:56,843 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-11-07 06:24:58,095 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-11-07 06:24:58,665 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-11-07 06:25:02,541 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-11-07 06:25:03,483 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-11-07 06:25:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:25:05,504 INFO L93 Difference]: Finished difference Result 5036 states and 6914 transitions. [2020-11-07 06:25:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-07 06:25:05,505 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 276 [2020-11-07 06:25:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:25:05,553 INFO L225 Difference]: With dead ends: 5036 [2020-11-07 06:25:05,553 INFO L226 Difference]: Without dead ends: 3665 [2020-11-07 06:25:05,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 06:25:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2020-11-07 06:25:06,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3011. [2020-11-07 06:25:06,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3011 states. [2020-11-07 06:25:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 3767 transitions. [2020-11-07 06:25:06,256 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 3767 transitions. Word has length 276 [2020-11-07 06:25:06,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:25:06,257 INFO L481 AbstractCegarLoop]: Abstraction has 3011 states and 3767 transitions. [2020-11-07 06:25:06,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:25:06,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 3767 transitions. [2020-11-07 06:25:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-11-07 06:25:06,265 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:25:06,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:25:06,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:25:06,266 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:25:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:25:06,266 INFO L82 PathProgramCache]: Analyzing trace with hash 2132790994, now seen corresponding path program 1 times [2020-11-07 06:25:06,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:25:06,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143984503] [2020-11-07 06:25:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:25:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:06,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:25:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:06,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:25:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:06,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-11-07 06:25:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 117 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:25:07,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143984503] [2020-11-07 06:25:07,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:25:07,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-07 06:25:07,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431770759] [2020-11-07 06:25:07,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 06:25:07,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:25:07,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 06:25:07,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:25:07,049 INFO L87 Difference]: Start difference. First operand 3011 states and 3767 transitions. Second operand 11 states. [2020-11-07 06:25:14,482 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-11-07 06:25:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:25:17,118 INFO L93 Difference]: Finished difference Result 8674 states and 11584 transitions. [2020-11-07 06:25:17,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:25:17,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 294 [2020-11-07 06:25:17,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:25:17,175 INFO L225 Difference]: With dead ends: 8674 [2020-11-07 06:25:17,175 INFO L226 Difference]: Without dead ends: 5686 [2020-11-07 06:25:17,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-11-07 06:25:17,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2020-11-07 06:25:17,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4227. [2020-11-07 06:25:17,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-11-07 06:25:17,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 5191 transitions. [2020-11-07 06:25:17,977 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 5191 transitions. Word has length 294 [2020-11-07 06:25:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:25:17,978 INFO L481 AbstractCegarLoop]: Abstraction has 4227 states and 5191 transitions. [2020-11-07 06:25:17,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 06:25:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 5191 transitions. [2020-11-07 06:25:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-11-07 06:25:17,990 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:25:17,990 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:25:17,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:25:17,991 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:25:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:25:17,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1393617540, now seen corresponding path program 1 times [2020-11-07 06:25:17,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:25:17,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568747736] [2020-11-07 06:25:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:25:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:18,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:25:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:18,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:25:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:18,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-11-07 06:25:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 88 proven. 69 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 06:25:18,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568747736] [2020-11-07 06:25:18,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:25:18,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 06:25:18,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091385915] [2020-11-07 06:25:18,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:25:18,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:25:18,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:25:18,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:25:18,508 INFO L87 Difference]: Start difference. First operand 4227 states and 5191 transitions. Second operand 7 states. [2020-11-07 06:25:22,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:25:22,589 INFO L93 Difference]: Finished difference Result 9114 states and 11306 transitions. [2020-11-07 06:25:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 06:25:22,590 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 342 [2020-11-07 06:25:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:25:22,623 INFO L225 Difference]: With dead ends: 9114 [2020-11-07 06:25:22,623 INFO L226 Difference]: Without dead ends: 4910 [2020-11-07 06:25:22,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:25:22,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2020-11-07 06:25:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 4671. [2020-11-07 06:25:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4671 states. [2020-11-07 06:25:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 5716 transitions. [2020-11-07 06:25:23,648 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 5716 transitions. Word has length 342 [2020-11-07 06:25:23,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:25:23,648 INFO L481 AbstractCegarLoop]: Abstraction has 4671 states and 5716 transitions. [2020-11-07 06:25:23,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:25:23,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 5716 transitions. [2020-11-07 06:25:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-11-07 06:25:23,668 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:25:23,669 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:25:23,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:25:23,669 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:25:23,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:25:23,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1734907294, now seen corresponding path program 1 times [2020-11-07 06:25:23,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:25:23,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769859108] [2020-11-07 06:25:23,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:25:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:23,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:25:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:23,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:25:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:23,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-11-07 06:25:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:24,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-11-07 06:25:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 240 proven. 73 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-11-07 06:25:24,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769859108] [2020-11-07 06:25:24,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:25:24,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 06:25:24,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700568755] [2020-11-07 06:25:24,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 06:25:24,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:25:24,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 06:25:24,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:25:24,348 INFO L87 Difference]: Start difference. First operand 4671 states and 5716 transitions. Second operand 9 states. [2020-11-07 06:25:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:25:33,011 INFO L93 Difference]: Finished difference Result 12168 states and 15503 transitions. [2020-11-07 06:25:33,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 06:25:33,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 448 [2020-11-07 06:25:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:25:33,059 INFO L225 Difference]: With dead ends: 12168 [2020-11-07 06:25:33,059 INFO L226 Difference]: Without dead ends: 5442 [2020-11-07 06:25:33,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:25:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states. [2020-11-07 06:25:34,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5442 to 5430. [2020-11-07 06:25:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5430 states. [2020-11-07 06:25:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5430 states to 5430 states and 6896 transitions. [2020-11-07 06:25:34,223 INFO L78 Accepts]: Start accepts. Automaton has 5430 states and 6896 transitions. Word has length 448 [2020-11-07 06:25:34,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:25:34,224 INFO L481 AbstractCegarLoop]: Abstraction has 5430 states and 6896 transitions. [2020-11-07 06:25:34,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 06:25:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 5430 states and 6896 transitions. [2020-11-07 06:25:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-11-07 06:25:34,254 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:25:34,254 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:25:34,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:25:34,255 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:25:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:25:34,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2044318254, now seen corresponding path program 1 times [2020-11-07 06:25:34,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:25:34,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31705597] [2020-11-07 06:25:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:25:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:34,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:25:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:34,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:25:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:34,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:25:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:34,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-11-07 06:25:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 254 proven. 73 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-11-07 06:25:35,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31705597] [2020-11-07 06:25:35,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:25:35,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:25:35,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352074465] [2020-11-07 06:25:35,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:25:35,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:25:35,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:25:35,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:25:35,127 INFO L87 Difference]: Start difference. First operand 5430 states and 6896 transitions. Second operand 10 states. [2020-11-07 06:25:35,984 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-11-07 06:25:37,841 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-11-07 06:25:39,665 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-11-07 06:25:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:25:44,147 INFO L93 Difference]: Finished difference Result 12153 states and 15966 transitions. [2020-11-07 06:25:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 06:25:44,148 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 460 [2020-11-07 06:25:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:25:44,227 INFO L225 Difference]: With dead ends: 12153 [2020-11-07 06:25:44,227 INFO L226 Difference]: Without dead ends: 6756 [2020-11-07 06:25:44,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 06:25:44,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6756 states. [2020-11-07 06:25:45,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6756 to 6411. [2020-11-07 06:25:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6411 states. [2020-11-07 06:25:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6411 states to 6411 states and 8121 transitions. [2020-11-07 06:25:45,970 INFO L78 Accepts]: Start accepts. Automaton has 6411 states and 8121 transitions. Word has length 460 [2020-11-07 06:25:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:25:45,971 INFO L481 AbstractCegarLoop]: Abstraction has 6411 states and 8121 transitions. [2020-11-07 06:25:45,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:25:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 6411 states and 8121 transitions. [2020-11-07 06:25:45,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-11-07 06:25:45,994 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:25:45,994 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:25:45,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:25:45,995 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:25:45,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:25:45,995 INFO L82 PathProgramCache]: Analyzing trace with hash 518034488, now seen corresponding path program 1 times [2020-11-07 06:25:45,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:25:45,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523622047] [2020-11-07 06:25:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:25:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:46,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:25:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:46,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:25:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:46,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-11-07 06:25:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:46,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 341 [2020-11-07 06:25:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 257 proven. 73 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-11-07 06:25:46,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523622047] [2020-11-07 06:25:46,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:25:46,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 06:25:46,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185365326] [2020-11-07 06:25:46,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:25:46,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:25:46,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:25:46,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:25:46,535 INFO L87 Difference]: Start difference. First operand 6411 states and 8121 transitions. Second operand 7 states. [2020-11-07 06:25:52,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:25:52,709 INFO L93 Difference]: Finished difference Result 12822 states and 16234 transitions. [2020-11-07 06:25:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 06:25:52,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 465 [2020-11-07 06:25:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:25:52,757 INFO L225 Difference]: With dead ends: 12822 [2020-11-07 06:25:52,757 INFO L226 Difference]: Without dead ends: 6444 [2020-11-07 06:25:52,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:25:52,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6444 states. [2020-11-07 06:25:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6444 to 6413. [2020-11-07 06:25:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6413 states. [2020-11-07 06:25:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6413 states to 6413 states and 7795 transitions. [2020-11-07 06:25:54,181 INFO L78 Accepts]: Start accepts. Automaton has 6413 states and 7795 transitions. Word has length 465 [2020-11-07 06:25:54,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:25:54,181 INFO L481 AbstractCegarLoop]: Abstraction has 6413 states and 7795 transitions. [2020-11-07 06:25:54,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:25:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 6413 states and 7795 transitions. [2020-11-07 06:25:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2020-11-07 06:25:54,205 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:25:54,205 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:25:54,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:25:54,206 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:25:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:25:54,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1623823825, now seen corresponding path program 1 times [2020-11-07 06:25:54,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:25:54,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28111694] [2020-11-07 06:25:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:25:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:54,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:25:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:54,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:25:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:54,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-11-07 06:25:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:54,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-11-07 06:25:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:54,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 395 [2020-11-07 06:25:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:25:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 272 proven. 142 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-11-07 06:25:55,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28111694] [2020-11-07 06:25:55,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:25:55,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-07 06:25:55,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473843302] [2020-11-07 06:25:55,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 06:25:55,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:25:55,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 06:25:55,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-11-07 06:25:55,224 INFO L87 Difference]: Start difference. First operand 6413 states and 7795 transitions. Second operand 13 states. [2020-11-07 06:25:55,663 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-11-07 06:25:56,002 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-11-07 06:25:56,312 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-11-07 06:25:56,527 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-11-07 06:25:57,300 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2020-11-07 06:25:57,838 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-11-07 06:25:58,274 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-11-07 06:25:58,992 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-11-07 06:25:59,340 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-11-07 06:25:59,882 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-11-07 06:26:00,193 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-11-07 06:26:00,675 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-11-07 06:26:01,087 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-11-07 06:26:01,608 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-11-07 06:26:02,170 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-11-07 06:26:02,486 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-11-07 06:26:05,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:26:05,324 INFO L93 Difference]: Finished difference Result 13145 states and 16046 transitions. [2020-11-07 06:26:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 06:26:05,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 519 [2020-11-07 06:26:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:26:05,361 INFO L225 Difference]: With dead ends: 13145 [2020-11-07 06:26:05,361 INFO L226 Difference]: Without dead ends: 6446 [2020-11-07 06:26:05,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=345, Invalid=987, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 06:26:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6446 states. [2020-11-07 06:26:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6446 to 6361. [2020-11-07 06:26:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6361 states. [2020-11-07 06:26:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 7561 transitions. [2020-11-07 06:26:06,821 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 7561 transitions. Word has length 519 [2020-11-07 06:26:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:26:06,822 INFO L481 AbstractCegarLoop]: Abstraction has 6361 states and 7561 transitions. [2020-11-07 06:26:06,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 06:26:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 7561 transitions. [2020-11-07 06:26:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2020-11-07 06:26:06,838 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:26:06,838 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:26:06,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:26:06,839 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:26:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:26:06,839 INFO L82 PathProgramCache]: Analyzing trace with hash -351943718, now seen corresponding path program 1 times [2020-11-07 06:26:06,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:26:06,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019302365] [2020-11-07 06:26:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:26:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:07,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:26:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:07,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:26:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:07,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:26:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:07,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-11-07 06:26:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:07,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-11-07 06:26:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 388 proven. 77 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-11-07 06:26:07,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019302365] [2020-11-07 06:26:07,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:26:07,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 06:26:07,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780875183] [2020-11-07 06:26:07,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 06:26:07,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:26:07,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 06:26:07,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:26:07,537 INFO L87 Difference]: Start difference. First operand 6361 states and 7561 transitions. Second operand 9 states. [2020-11-07 06:26:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:26:15,442 INFO L93 Difference]: Finished difference Result 13497 states and 16172 transitions. [2020-11-07 06:26:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 06:26:15,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 542 [2020-11-07 06:26:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:26:15,474 INFO L225 Difference]: With dead ends: 13497 [2020-11-07 06:26:15,475 INFO L226 Difference]: Without dead ends: 4535 [2020-11-07 06:26:15,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:26:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4535 states. [2020-11-07 06:26:16,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4535 to 4511. [2020-11-07 06:26:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4511 states. [2020-11-07 06:26:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 4800 transitions. [2020-11-07 06:26:16,503 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 4800 transitions. Word has length 542 [2020-11-07 06:26:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:26:16,503 INFO L481 AbstractCegarLoop]: Abstraction has 4511 states and 4800 transitions. [2020-11-07 06:26:16,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 06:26:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 4800 transitions. [2020-11-07 06:26:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2020-11-07 06:26:16,511 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:26:16,512 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:26:16,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 06:26:16,512 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:26:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:26:16,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1640235182, now seen corresponding path program 1 times [2020-11-07 06:26:16,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:26:16,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495647178] [2020-11-07 06:26:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:26:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:16,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:26:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:16,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:26:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:16,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:26:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:16,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-11-07 06:26:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:16,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 461 [2020-11-07 06:26:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 435 proven. 73 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-11-07 06:26:17,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495647178] [2020-11-07 06:26:17,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:26:17,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 06:26:17,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709753745] [2020-11-07 06:26:17,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:26:17,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:26:17,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:26:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:26:17,291 INFO L87 Difference]: Start difference. First operand 4511 states and 4800 transitions. Second operand 7 states. [2020-11-07 06:26:20,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:26:20,527 INFO L93 Difference]: Finished difference Result 10181 states and 10899 transitions. [2020-11-07 06:26:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 06:26:20,528 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 585 [2020-11-07 06:26:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:26:20,552 INFO L225 Difference]: With dead ends: 10181 [2020-11-07 06:26:20,553 INFO L226 Difference]: Without dead ends: 5882 [2020-11-07 06:26:20,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:26:20,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2020-11-07 06:26:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 5482. [2020-11-07 06:26:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5482 states. [2020-11-07 06:26:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5482 states to 5482 states and 5856 transitions. [2020-11-07 06:26:21,653 INFO L78 Accepts]: Start accepts. Automaton has 5482 states and 5856 transitions. Word has length 585 [2020-11-07 06:26:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:26:21,654 INFO L481 AbstractCegarLoop]: Abstraction has 5482 states and 5856 transitions. [2020-11-07 06:26:21,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:26:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 5482 states and 5856 transitions. [2020-11-07 06:26:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2020-11-07 06:26:21,664 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:26:21,664 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:26:21,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 06:26:21,665 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:26:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:26:21,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1523097282, now seen corresponding path program 1 times [2020-11-07 06:26:21,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:26:21,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463239598] [2020-11-07 06:26:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:26:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:21,972 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-11-07 06:26:22,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:26:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:22,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:26:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:22,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-11-07 06:26:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:22,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-11-07 06:26:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:22,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2020-11-07 06:26:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 407 proven. 42 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2020-11-07 06:26:22,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463239598] [2020-11-07 06:26:22,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:26:22,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-07 06:26:22,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68096344] [2020-11-07 06:26:22,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 06:26:22,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:26:22,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 06:26:22,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:26:22,662 INFO L87 Difference]: Start difference. First operand 5482 states and 5856 transitions. Second operand 11 states. [2020-11-07 06:26:24,061 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-11-07 06:26:31,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:26:31,145 INFO L93 Difference]: Finished difference Result 10658 states and 11376 transitions. [2020-11-07 06:26:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 06:26:31,146 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 671 [2020-11-07 06:26:31,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:26:31,166 INFO L225 Difference]: With dead ends: 10658 [2020-11-07 06:26:31,166 INFO L226 Difference]: Without dead ends: 5388 [2020-11-07 06:26:31,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=352, Invalid=1370, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 06:26:31,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2020-11-07 06:26:32,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4977. [2020-11-07 06:26:32,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4977 states. [2020-11-07 06:26:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4977 states to 4977 states and 5204 transitions. [2020-11-07 06:26:32,368 INFO L78 Accepts]: Start accepts. Automaton has 4977 states and 5204 transitions. Word has length 671 [2020-11-07 06:26:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:26:32,369 INFO L481 AbstractCegarLoop]: Abstraction has 4977 states and 5204 transitions. [2020-11-07 06:26:32,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 06:26:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 4977 states and 5204 transitions. [2020-11-07 06:26:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2020-11-07 06:26:32,381 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:26:32,382 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:26:32,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 06:26:32,382 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:26:32,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:26:32,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1416845281, now seen corresponding path program 1 times [2020-11-07 06:26:32,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:26:32,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561738322] [2020-11-07 06:26:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:26:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:32,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:26:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:32,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:26:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:32,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:26:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:32,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-11-07 06:26:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:32,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-11-07 06:26:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:32,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 629 [2020-11-07 06:26:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 230 proven. 98 refuted. 0 times theorem prover too weak. 1040 trivial. 0 not checked. [2020-11-07 06:26:33,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561738322] [2020-11-07 06:26:33,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:26:33,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 06:26:33,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741087675] [2020-11-07 06:26:33,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 06:26:33,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:26:33,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 06:26:33,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:26:33,311 INFO L87 Difference]: Start difference. First operand 4977 states and 5204 transitions. Second operand 9 states. [2020-11-07 06:26:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:26:40,081 INFO L93 Difference]: Finished difference Result 10154 states and 10626 transitions. [2020-11-07 06:26:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 06:26:40,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 771 [2020-11-07 06:26:40,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:26:40,101 INFO L225 Difference]: With dead ends: 10154 [2020-11-07 06:26:40,101 INFO L226 Difference]: Without dead ends: 5180 [2020-11-07 06:26:40,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:26:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5180 states. [2020-11-07 06:26:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5180 to 5151. [2020-11-07 06:26:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5151 states. [2020-11-07 06:26:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5151 states to 5151 states and 5354 transitions. [2020-11-07 06:26:41,270 INFO L78 Accepts]: Start accepts. Automaton has 5151 states and 5354 transitions. Word has length 771 [2020-11-07 06:26:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:26:41,270 INFO L481 AbstractCegarLoop]: Abstraction has 5151 states and 5354 transitions. [2020-11-07 06:26:41,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 06:26:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 5151 states and 5354 transitions. [2020-11-07 06:26:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2020-11-07 06:26:41,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:26:41,277 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:26:41,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 06:26:41,277 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:26:41,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:26:41,278 INFO L82 PathProgramCache]: Analyzing trace with hash -257759105, now seen corresponding path program 1 times [2020-11-07 06:26:41,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:26:41,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915546031] [2020-11-07 06:26:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:26:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:41,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:26:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:41,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:26:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:41,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:26:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:41,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-11-07 06:26:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:41,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-11-07 06:26:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:41,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 629 [2020-11-07 06:26:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:41,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 716 [2020-11-07 06:26:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 668 proven. 99 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2020-11-07 06:26:42,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915546031] [2020-11-07 06:26:42,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:26:42,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:26:42,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318236626] [2020-11-07 06:26:42,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:26:42,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:26:42,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:26:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:26:42,379 INFO L87 Difference]: Start difference. First operand 5151 states and 5354 transitions. Second operand 12 states. [2020-11-07 06:26:45,730 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-11-07 06:26:47,345 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-11-07 06:26:49,482 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-11-07 06:26:51,397 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-11-07 06:26:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:26:53,863 INFO L93 Difference]: Finished difference Result 10484 states and 10903 transitions. [2020-11-07 06:26:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 06:26:53,864 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 840 [2020-11-07 06:26:53,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:26:53,879 INFO L225 Difference]: With dead ends: 10484 [2020-11-07 06:26:53,879 INFO L226 Difference]: Without dead ends: 5147 [2020-11-07 06:26:53,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 06:26:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2020-11-07 06:26:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 4951. [2020-11-07 06:26:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4951 states. [2020-11-07 06:26:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4951 states to 4951 states and 5104 transitions. [2020-11-07 06:26:54,914 INFO L78 Accepts]: Start accepts. Automaton has 4951 states and 5104 transitions. Word has length 840 [2020-11-07 06:26:54,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:26:54,914 INFO L481 AbstractCegarLoop]: Abstraction has 4951 states and 5104 transitions. [2020-11-07 06:26:54,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:26:54,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4951 states and 5104 transitions. [2020-11-07 06:26:54,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 890 [2020-11-07 06:26:54,923 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:26:54,924 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:26:54,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 06:26:54,924 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:26:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:26:54,925 INFO L82 PathProgramCache]: Analyzing trace with hash 999109453, now seen corresponding path program 1 times [2020-11-07 06:26:54,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:26:54,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543545422] [2020-11-07 06:26:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:26:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:55,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:26:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:55,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:26:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:55,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:26:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:55,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-11-07 06:26:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:55,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-11-07 06:26:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:55,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 629 [2020-11-07 06:26:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:55,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 765 [2020-11-07 06:26:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:26:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 660 proven. 599 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2020-11-07 06:26:56,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543545422] [2020-11-07 06:26:56,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:26:56,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 06:26:56,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290738962] [2020-11-07 06:26:56,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 06:26:56,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:26:56,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 06:26:56,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:26:56,165 INFO L87 Difference]: Start difference. First operand 4951 states and 5104 transitions. Second operand 9 states. [2020-11-07 06:27:00,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:27:00,106 INFO L93 Difference]: Finished difference Result 11066 states and 11410 transitions. [2020-11-07 06:27:00,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:27:00,107 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 889 [2020-11-07 06:27:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:27:00,124 INFO L225 Difference]: With dead ends: 11066 [2020-11-07 06:27:00,125 INFO L226 Difference]: Without dead ends: 6327 [2020-11-07 06:27:00,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:27:00,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6327 states. [2020-11-07 06:27:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6327 to 5927. [2020-11-07 06:27:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5927 states. [2020-11-07 06:27:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 6109 transitions. [2020-11-07 06:27:01,298 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 6109 transitions. Word has length 889 [2020-11-07 06:27:01,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:27:01,298 INFO L481 AbstractCegarLoop]: Abstraction has 5927 states and 6109 transitions. [2020-11-07 06:27:01,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 06:27:01,299 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 6109 transitions. [2020-11-07 06:27:01,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2020-11-07 06:27:01,306 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:27:01,306 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:27:01,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 06:27:01,307 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:27:01,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:27:01,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1338029140, now seen corresponding path program 1 times [2020-11-07 06:27:01,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:27:01,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727684907] [2020-11-07 06:27:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:27:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:01,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:27:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:01,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:27:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:01,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:27:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:01,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-11-07 06:27:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:01,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 451 [2020-11-07 06:27:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:01,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 640 [2020-11-07 06:27:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:02,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 776 [2020-11-07 06:27:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 561 proven. 379 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2020-11-07 06:27:02,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727684907] [2020-11-07 06:27:02,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:27:02,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-07 06:27:02,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750527838] [2020-11-07 06:27:02,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 06:27:02,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:27:02,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 06:27:02,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:27:02,988 INFO L87 Difference]: Start difference. First operand 5927 states and 6109 transitions. Second operand 11 states. [2020-11-07 06:27:03,738 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-11-07 06:27:04,052 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-11-07 06:27:04,221 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-11-07 06:27:05,804 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-11-07 06:27:06,003 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-11-07 06:27:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:27:09,586 INFO L93 Difference]: Finished difference Result 12138 states and 12644 transitions. [2020-11-07 06:27:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:27:09,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 900 [2020-11-07 06:27:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:27:09,620 INFO L225 Difference]: With dead ends: 12138 [2020-11-07 06:27:09,620 INFO L226 Difference]: Without dead ends: 6423 [2020-11-07 06:27:09,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2020-11-07 06:27:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6423 states. [2020-11-07 06:27:10,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6423 to 5927. [2020-11-07 06:27:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5927 states. [2020-11-07 06:27:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 6109 transitions. [2020-11-07 06:27:10,913 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 6109 transitions. Word has length 900 [2020-11-07 06:27:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:27:10,914 INFO L481 AbstractCegarLoop]: Abstraction has 5927 states and 6109 transitions. [2020-11-07 06:27:10,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 06:27:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 6109 transitions. [2020-11-07 06:27:10,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 997 [2020-11-07 06:27:10,921 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:27:10,922 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:27:10,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 06:27:10,922 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:27:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:27:10,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1009013707, now seen corresponding path program 1 times [2020-11-07 06:27:10,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:27:10,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654910880] [2020-11-07 06:27:10,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:27:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:11,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:27:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:11,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:27:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:11,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:27:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:11,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-11-07 06:27:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:11,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2020-11-07 06:27:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:11,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2020-11-07 06:27:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:11,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 736 [2020-11-07 06:27:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:11,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 872 [2020-11-07 06:27:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 905 proven. 197 refuted. 0 times theorem prover too weak. 1399 trivial. 0 not checked. [2020-11-07 06:27:12,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654910880] [2020-11-07 06:27:12,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:27:12,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 06:27:12,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668954286] [2020-11-07 06:27:12,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:27:12,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:27:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:27:12,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:27:12,268 INFO L87 Difference]: Start difference. First operand 5927 states and 6109 transitions. Second operand 7 states. [2020-11-07 06:27:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:27:15,488 INFO L93 Difference]: Finished difference Result 11850 states and 12213 transitions. [2020-11-07 06:27:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 06:27:15,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 996 [2020-11-07 06:27:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:27:15,505 INFO L225 Difference]: With dead ends: 11850 [2020-11-07 06:27:15,505 INFO L226 Difference]: Without dead ends: 6135 [2020-11-07 06:27:15,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:27:15,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6135 states. [2020-11-07 06:27:16,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6135 to 5927. [2020-11-07 06:27:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5927 states. [2020-11-07 06:27:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 6107 transitions. [2020-11-07 06:27:16,773 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 6107 transitions. Word has length 996 [2020-11-07 06:27:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:27:16,773 INFO L481 AbstractCegarLoop]: Abstraction has 5927 states and 6107 transitions. [2020-11-07 06:27:16,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:27:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 6107 transitions. [2020-11-07 06:27:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1072 [2020-11-07 06:27:16,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:27:16,782 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:27:16,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 06:27:16,782 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:27:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:27:16,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1759008184, now seen corresponding path program 1 times [2020-11-07 06:27:16,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:27:16,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76882233] [2020-11-07 06:27:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:27:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:17,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:27:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:17,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:27:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:17,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:27:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:17,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-11-07 06:27:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:17,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-11-07 06:27:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:17,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 622 [2020-11-07 06:27:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:17,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 811 [2020-11-07 06:27:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:17,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 947 [2020-11-07 06:27:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2763 backedges. 958 proven. 283 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2020-11-07 06:27:18,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76882233] [2020-11-07 06:27:18,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:27:18,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:27:18,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011179004] [2020-11-07 06:27:18,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:27:18,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:27:18,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:27:18,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:27:18,437 INFO L87 Difference]: Start difference. First operand 5927 states and 6107 transitions. Second operand 12 states. [2020-11-07 06:27:22,158 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-11-07 06:27:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:27:29,047 INFO L93 Difference]: Finished difference Result 12237 states and 12605 transitions. [2020-11-07 06:27:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-07 06:27:29,048 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1071 [2020-11-07 06:27:29,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:27:29,067 INFO L225 Difference]: With dead ends: 12237 [2020-11-07 06:27:29,068 INFO L226 Difference]: Without dead ends: 4724 [2020-11-07 06:27:29,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=369, Invalid=1437, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 06:27:29,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4724 states. [2020-11-07 06:27:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4724 to 4516. [2020-11-07 06:27:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4516 states. [2020-11-07 06:27:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 4606 transitions. [2020-11-07 06:27:30,238 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 4606 transitions. Word has length 1071 [2020-11-07 06:27:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:27:30,239 INFO L481 AbstractCegarLoop]: Abstraction has 4516 states and 4606 transitions. [2020-11-07 06:27:30,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:27:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 4606 transitions. [2020-11-07 06:27:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1082 [2020-11-07 06:27:30,249 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:27:30,250 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:27:30,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 06:27:30,250 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:27:30,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:27:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2040957710, now seen corresponding path program 1 times [2020-11-07 06:27:30,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:27:30,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126850938] [2020-11-07 06:27:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:27:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:30,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:27:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:30,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:27:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:30,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:27:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:30,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-11-07 06:27:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:30,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2020-11-07 06:27:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:30,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2020-11-07 06:27:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:30,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-11-07 06:27:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:30,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 821 [2020-11-07 06:27:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:30,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 957 [2020-11-07 06:27:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3117 backedges. 797 proven. 322 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2020-11-07 06:27:31,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126850938] [2020-11-07 06:27:31,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:27:31,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-07 06:27:31,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967358597] [2020-11-07 06:27:31,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 06:27:31,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:27:31,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 06:27:31,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:27:31,724 INFO L87 Difference]: Start difference. First operand 4516 states and 4606 transitions. Second operand 15 states. [2020-11-07 06:27:33,488 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-11-07 06:27:39,215 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-11-07 06:27:40,120 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-11-07 06:27:43,287 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-11-07 06:27:48,389 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-11-07 06:27:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:27:51,850 INFO L93 Difference]: Finished difference Result 7640 states and 7794 transitions. [2020-11-07 06:27:51,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-07 06:27:51,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 1081 [2020-11-07 06:27:51,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:27:51,862 INFO L225 Difference]: With dead ends: 7640 [2020-11-07 06:27:51,862 INFO L226 Difference]: Without dead ends: 3740 [2020-11-07 06:27:51,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=818, Invalid=4012, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 06:27:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2020-11-07 06:27:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3546. [2020-11-07 06:27:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3546 states. [2020-11-07 06:27:52,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 3605 transitions. [2020-11-07 06:27:52,592 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 3605 transitions. Word has length 1081 [2020-11-07 06:27:52,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:27:52,593 INFO L481 AbstractCegarLoop]: Abstraction has 3546 states and 3605 transitions. [2020-11-07 06:27:52,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 06:27:52,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 3605 transitions. [2020-11-07 06:27:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1240 [2020-11-07 06:27:52,605 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:27:52,605 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:27:52,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 06:27:52,606 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:27:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:27:52,606 INFO L82 PathProgramCache]: Analyzing trace with hash -130991602, now seen corresponding path program 1 times [2020-11-07 06:27:52,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:27:52,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821114331] [2020-11-07 06:27:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:27:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:52,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:27:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:52,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:27:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:52,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:27:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:52,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-11-07 06:27:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:53,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2020-11-07 06:27:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:53,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2020-11-07 06:27:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:53,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-11-07 06:27:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:53,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 821 [2020-11-07 06:27:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:53,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1011 [2020-11-07 06:27:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:27:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3617 backedges. 1773 proven. 441 refuted. 0 times theorem prover too weak. 1403 trivial. 0 not checked. [2020-11-07 06:27:54,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821114331] [2020-11-07 06:27:54,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:27:54,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:27:54,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783471100] [2020-11-07 06:27:54,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:27:54,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:27:54,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:27:54,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:27:54,286 INFO L87 Difference]: Start difference. First operand 3546 states and 3605 transitions. Second operand 12 states. [2020-11-07 06:27:54,494 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-11-07 06:27:56,244 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-11-07 06:27:56,615 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-11-07 06:27:57,430 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-11-07 06:27:57,639 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-11-07 06:27:58,680 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-11-07 06:27:58,937 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-11-07 06:28:00,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:28:00,571 INFO L93 Difference]: Finished difference Result 5497 states and 5588 transitions. [2020-11-07 06:28:00,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:28:00,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1239 [2020-11-07 06:28:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:28:00,583 INFO L225 Difference]: With dead ends: 5497 [2020-11-07 06:28:00,583 INFO L226 Difference]: Without dead ends: 3939 [2020-11-07 06:28:00,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:28:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2020-11-07 06:28:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3739. [2020-11-07 06:28:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3739 states. [2020-11-07 06:28:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 3799 transitions. [2020-11-07 06:28:01,462 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 3799 transitions. Word has length 1239 [2020-11-07 06:28:01,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:28:01,462 INFO L481 AbstractCegarLoop]: Abstraction has 3739 states and 3799 transitions. [2020-11-07 06:28:01,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:28:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 3799 transitions. [2020-11-07 06:28:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1515 [2020-11-07 06:28:01,475 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:28:01,482 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:28:01,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 06:28:01,482 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:28:01,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:28:01,483 INFO L82 PathProgramCache]: Analyzing trace with hash 701375638, now seen corresponding path program 1 times [2020-11-07 06:28:01,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:28:01,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506263924] [2020-11-07 06:28:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:28:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:01,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:28:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:01,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:28:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:01,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:28:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:01,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-11-07 06:28:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:01,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2020-11-07 06:28:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:01,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2020-11-07 06:28:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:01,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-11-07 06:28:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:02,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 821 [2020-11-07 06:28:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:02,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 947 [2020-11-07 06:28:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:02,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1096 [2020-11-07 06:28:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:02,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1286 [2020-11-07 06:28:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5723 backedges. 2442 proven. 108 refuted. 0 times theorem prover too weak. 3173 trivial. 0 not checked. [2020-11-07 06:28:03,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506263924] [2020-11-07 06:28:03,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:28:03,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 06:28:03,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459330020] [2020-11-07 06:28:03,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 06:28:03,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:28:03,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 06:28:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:28:03,625 INFO L87 Difference]: Start difference. First operand 3739 states and 3799 transitions. Second operand 9 states. [2020-11-07 06:28:06,447 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-11-07 06:28:08,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:28:08,102 INFO L93 Difference]: Finished difference Result 8037 states and 8174 transitions. [2020-11-07 06:28:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:28:08,104 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1514 [2020-11-07 06:28:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:28:08,115 INFO L225 Difference]: With dead ends: 8037 [2020-11-07 06:28:08,116 INFO L226 Difference]: Without dead ends: 3931 [2020-11-07 06:28:08,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:28:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2020-11-07 06:28:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3728. [2020-11-07 06:28:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3728 states. [2020-11-07 06:28:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 3780 transitions. [2020-11-07 06:28:08,903 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 3780 transitions. Word has length 1514 [2020-11-07 06:28:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:28:08,904 INFO L481 AbstractCegarLoop]: Abstraction has 3728 states and 3780 transitions. [2020-11-07 06:28:08,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 06:28:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 3780 transitions. [2020-11-07 06:28:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1827 [2020-11-07 06:28:08,922 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:28:08,923 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:28:08,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 06:28:08,923 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:28:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:28:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash -610049466, now seen corresponding path program 1 times [2020-11-07 06:28:08,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:28:08,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293814575] [2020-11-07 06:28:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:28:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:28:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-07 06:28:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 06:28:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-11-07 06:28:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2020-11-07 06:28:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2020-11-07 06:28:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-11-07 06:28:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 821 [2020-11-07 06:28:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 947 [2020-11-07 06:28:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1096 [2020-11-07 06:28:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1286 [2020-11-07 06:28:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1408 [2020-11-07 06:28:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:09,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1598 [2020-11-07 06:28:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:28:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8466 backedges. 3622 proven. 470 refuted. 0 times theorem prover too weak. 4374 trivial. 0 not checked. [2020-11-07 06:28:11,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293814575] [2020-11-07 06:28:11,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:28:11,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 06:28:11,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480103461] [2020-11-07 06:28:11,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 06:28:11,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:28:11,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 06:28:11,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:28:11,885 INFO L87 Difference]: Start difference. First operand 3728 states and 3780 transitions. Second operand 9 states. [2020-11-07 06:28:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:28:17,102 INFO L93 Difference]: Finished difference Result 6054 states and 6140 transitions. [2020-11-07 06:28:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:28:17,103 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1826 [2020-11-07 06:28:17,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:28:17,108 INFO L225 Difference]: With dead ends: 6054 [2020-11-07 06:28:17,108 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 06:28:17,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:28:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 06:28:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 06:28:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 06:28:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 06:28:17,117 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1826 [2020-11-07 06:28:17,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:28:17,117 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 06:28:17,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 06:28:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 06:28:17,117 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 06:28:17,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 06:28:17,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 06:28:56,060 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:56,264 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 155 [2020-11-07 06:28:56,487 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:56,693 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:56,924 WARN L194 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:57,133 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:57,341 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:57,564 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:57,811 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:58,026 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:58,237 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:58,452 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:58,677 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:58,917 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:59,153 WARN L194 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:59,382 WARN L194 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:59,580 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:28:59,787 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:29:00,026 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:29:00,232 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-11-07 06:29:10,525 WARN L194 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-11-07 06:29:44,258 WARN L194 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-11-07 06:29:47,190 WARN L194 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-11-07 06:29:50,592 WARN L194 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-11-07 06:31:35,712 WARN L194 SmtUtils]: Spent 995.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-11-07 06:33:14,916 WARN L194 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-11-07 06:33:18,815 WARN L194 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 491 [2020-11-07 06:33:21,136 WARN L194 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 586 DAG size of output: 491 [2020-11-07 06:33:22,448 WARN L194 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 491 [2020-11-07 06:34:39,787 WARN L194 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 200 [2020-11-07 06:34:40,157 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-11-07 06:34:40,312 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 192 [2020-11-07 06:34:40,712 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 222 [2020-11-07 06:34:40,881 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 236 [2020-11-07 06:34:41,923 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 224 [2020-11-07 06:34:42,630 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 220 [2020-11-07 06:34:42,778 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-11-07 06:34:44,111 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 216 [2020-11-07 06:34:45,599 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 236 [2020-11-07 06:34:45,804 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 222 [2020-11-07 06:34:46,251 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 192 [2020-11-07 06:34:47,050 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-11-07 06:34:48,276 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-11-07 06:34:49,651 WARN L194 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 200 [2020-11-07 06:34:50,031 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-11-07 06:34:50,190 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 192 [2020-11-07 06:34:50,596 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 222 [2020-11-07 06:34:50,765 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 236 [2020-11-07 06:34:51,806 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 224 [2020-11-07 06:34:52,525 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 220 [2020-11-07 06:34:52,677 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-11-07 06:34:53,990 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 216 [2020-11-07 06:34:55,496 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 236 [2020-11-07 06:34:55,685 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 222 [2020-11-07 06:34:56,114 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 192 [2020-11-07 06:34:56,909 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-11-07 06:34:58,123 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2020-11-07 06:35:47,448 WARN L194 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 590 DAG size of output: 497 [2020-11-07 06:37:43,724 WARN L194 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 243 DAG size of output: 127 [2020-11-07 06:37:45,783 WARN L194 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 298 DAG size of output: 133 [2020-11-07 06:37:48,215 WARN L194 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 250 DAG size of output: 129 [2020-11-07 06:37:50,360 WARN L194 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 264 DAG size of output: 139 [2020-11-07 06:37:52,639 WARN L194 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 248 DAG size of output: 126 [2020-11-07 06:37:58,915 WARN L194 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 471 DAG size of output: 161