/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/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 04:51:00,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 04:51:00,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 04:51:00,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 04:51:00,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 04:51:00,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 04:51:00,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 04:51:00,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 04:51:00,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 04:51:00,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 04:51:00,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 04:51:00,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 04:51:00,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 04:51:00,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 04:51:00,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 04:51:00,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 04:51:00,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 04:51:00,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 04:51:00,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 04:51:00,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 04:51:00,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 04:51:00,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 04:51:00,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 04:51:00,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 04:51:00,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 04:51:00,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 04:51:00,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 04:51:00,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 04:51:00,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 04:51:00,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 04:51:00,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 04:51:00,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 04:51:00,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 04:51:00,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 04:51:00,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 04:51:00,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 04:51:00,597 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 04:51:00,621 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 04:51:00,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 04:51:00,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 04:51:00,626 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 04:51:00,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 04:51:00,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 04:51:00,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 04:51:00,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 04:51:00,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 04:51:00,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 04:51:00,629 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 04:51:00,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 04:51:00,629 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 04:51:00,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 04:51:00,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 04:51:00,630 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 04:51:00,630 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 04:51:00,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 04:51:00,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 04:51:00,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 04:51:00,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 04:51:00,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 04:51:00,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 04:51:01,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 04:51:01,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 04:51:01,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 04:51:01,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 04:51:01,095 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 04:51:01,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-11-07 04:51:01,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ce7d67ed/551bfc04207d47f7bde63992d08c90e6/FLAG74041cd84 [2020-11-07 04:51:01,768 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 04:51:01,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-11-07 04:51:01,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ce7d67ed/551bfc04207d47f7bde63992d08c90e6/FLAG74041cd84 [2020-11-07 04:51:02,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ce7d67ed/551bfc04207d47f7bde63992d08c90e6 [2020-11-07 04:51:02,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 04:51:02,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 04:51:02,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 04:51:02,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 04:51:02,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 04:51:02,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:51:02" (1/1) ... [2020-11-07 04:51:02,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1cf40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:02, skipping insertion in model container [2020-11-07 04:51:02,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:51:02" (1/1) ... [2020-11-07 04:51:02,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 04:51:02,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 04:51:02,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:51:02,423 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 04:51:02,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:51:02,460 INFO L208 MainTranslator]: Completed translation [2020-11-07 04:51:02,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:02 WrapperNode [2020-11-07 04:51:02,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 04:51:02,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 04:51:02,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 04:51:02,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 04:51:02,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:02" (1/1) ... [2020-11-07 04:51:02,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:02" (1/1) ... [2020-11-07 04:51:02,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:02" (1/1) ... [2020-11-07 04:51:02,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:02" (1/1) ... [2020-11-07 04:51:02,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:02" (1/1) ... [2020-11-07 04:51:02,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:02" (1/1) ... [2020-11-07 04:51:02,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:02" (1/1) ... [2020-11-07 04:51:02,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 04:51:02,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 04:51:02,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 04:51:02,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 04:51:02,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:02" (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 04:51:02,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 04:51:02,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 04:51:02,585 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 04:51:02,585 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-11-07 04:51:02,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 04:51:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 04:51:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 04:51:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 04:51:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 04:51:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 04:51:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-11-07 04:51:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 04:51:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 04:51:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 04:51:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 04:51:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 04:51:02,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 04:51:02,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 04:51:02,949 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 04:51:02,950 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 04:51:02,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:51:02 BoogieIcfgContainer [2020-11-07 04:51:02,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 04:51:02,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 04:51:02,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 04:51:02,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 04:51:02,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:51:02" (1/3) ... [2020-11-07 04:51:02,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ceda467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:51:02, skipping insertion in model container [2020-11-07 04:51:02,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:02" (2/3) ... [2020-11-07 04:51:02,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ceda467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:51:02, skipping insertion in model container [2020-11-07 04:51:02,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:51:02" (3/3) ... [2020-11-07 04:51:02,964 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-11-07 04:51:02,985 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 04:51:02,990 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 04:51:03,007 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 04:51:03,038 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 04:51:03,039 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 04:51:03,039 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 04:51:03,039 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 04:51:03,039 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 04:51:03,039 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 04:51:03,040 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 04:51:03,040 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 04:51:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-11-07 04:51:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-07 04:51:03,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:03,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 04:51:03,074 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:03,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1781058716, now seen corresponding path program 1 times [2020-11-07 04:51:03,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:03,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147076614] [2020-11-07 04:51:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:03,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:03,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:03,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 04:51:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-07 04:51:03,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147076614] [2020-11-07 04:51:03,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 04:51:03,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 04:51:03,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473836886] [2020-11-07 04:51:03,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 04:51:03,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:03,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 04:51:03,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 04:51:03,937 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 9 states. [2020-11-07 04:51:04,747 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-11-07 04:51:05,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:05,398 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-11-07 04:51:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 04:51:05,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-11-07 04:51:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:05,411 INFO L225 Difference]: With dead ends: 87 [2020-11-07 04:51:05,411 INFO L226 Difference]: Without dead ends: 60 [2020-11-07 04:51:05,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-07 04:51:05,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-07 04:51:05,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2020-11-07 04:51:05,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-07 04:51:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-11-07 04:51:05,485 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 45 [2020-11-07 04:51:05,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:05,486 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-11-07 04:51:05,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 04:51:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-11-07 04:51:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 04:51:05,492 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:05,492 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 04:51:05,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 04:51:05,493 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:05,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1209040977, now seen corresponding path program 1 times [2020-11-07 04:51:05,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:05,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151185961] [2020-11-07 04:51:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:05,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:05,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:05,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 04:51:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:05,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 04:51:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 04:51:05,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151185961] [2020-11-07 04:51:05,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:05,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-07 04:51:05,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671920978] [2020-11-07 04:51:05,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 04:51:05,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:05,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 04:51:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-11-07 04:51:05,726 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 11 states. [2020-11-07 04:51:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:06,564 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-11-07 04:51:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 04:51:06,566 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-11-07 04:51:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:06,570 INFO L225 Difference]: With dead ends: 93 [2020-11-07 04:51:06,570 INFO L226 Difference]: Without dead ends: 65 [2020-11-07 04:51:06,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-11-07 04:51:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-07 04:51:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-11-07 04:51:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-07 04:51:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2020-11-07 04:51:06,600 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 54 [2020-11-07 04:51:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:06,600 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2020-11-07 04:51:06,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 04:51:06,601 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2020-11-07 04:51:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 04:51:06,604 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:06,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-11-07 04:51:06,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 04:51:06,604 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:06,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1581273073, now seen corresponding path program 1 times [2020-11-07 04:51:06,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:06,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211772158] [2020-11-07 04:51:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:06,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:06,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:06,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-11-07 04:51:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:06,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-07 04:51:06,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211772158] [2020-11-07 04:51:06,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:06,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 04:51:06,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135815572] [2020-11-07 04:51:06,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 04:51:06,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:06,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 04:51:06,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 04:51:06,766 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 6 states. [2020-11-07 04:51:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:07,133 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2020-11-07 04:51:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 04:51:07,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-11-07 04:51:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:07,136 INFO L225 Difference]: With dead ends: 71 [2020-11-07 04:51:07,136 INFO L226 Difference]: Without dead ends: 56 [2020-11-07 04:51:07,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 04:51:07,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-07 04:51:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-07 04:51:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 04:51:07,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-11-07 04:51:07,173 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 55 [2020-11-07 04:51:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:07,173 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-11-07 04:51:07,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 04:51:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-11-07 04:51:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 04:51:07,176 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:07,176 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-11-07 04:51:07,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 04:51:07,177 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:07,177 INFO L82 PathProgramCache]: Analyzing trace with hash -176089127, now seen corresponding path program 2 times [2020-11-07 04:51:07,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:07,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243108887] [2020-11-07 04:51:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 04:51:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-07 04:51:07,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243108887] [2020-11-07 04:51:07,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 04:51:07,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 04:51:07,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942776206] [2020-11-07 04:51:07,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 04:51:07,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:07,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 04:51:07,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 04:51:07,312 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 6 states. [2020-11-07 04:51:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:07,629 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2020-11-07 04:51:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 04:51:07,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-11-07 04:51:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:07,631 INFO L225 Difference]: With dead ends: 63 [2020-11-07 04:51:07,632 INFO L226 Difference]: Without dead ends: 56 [2020-11-07 04:51:07,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 04:51:07,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-07 04:51:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-07 04:51:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 04:51:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-11-07 04:51:07,649 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 55 [2020-11-07 04:51:07,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:07,650 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-11-07 04:51:07,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 04:51:07,650 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-11-07 04:51:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-07 04:51:07,652 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:07,653 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 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] [2020-11-07 04:51:07,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 04:51:07,653 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:07,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1906928364, now seen corresponding path program 1 times [2020-11-07 04:51:07,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:07,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750879519] [2020-11-07 04:51:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 04:51:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 04:51:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-11-07 04:51:07,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750879519] [2020-11-07 04:51:07,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:07,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 04:51:07,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064807210] [2020-11-07 04:51:07,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 04:51:07,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:07,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 04:51:07,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 04:51:07,855 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 7 states. [2020-11-07 04:51:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:08,223 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-11-07 04:51:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 04:51:08,224 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-11-07 04:51:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:08,226 INFO L225 Difference]: With dead ends: 86 [2020-11-07 04:51:08,226 INFO L226 Difference]: Without dead ends: 45 [2020-11-07 04:51:08,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-07 04:51:08,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-07 04:51:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-07 04:51:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-07 04:51:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-11-07 04:51:08,254 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 84 [2020-11-07 04:51:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:08,255 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-11-07 04:51:08,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 04:51:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-11-07 04:51:08,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-07 04:51:08,264 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:08,264 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-11-07 04:51:08,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 04:51:08,264 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash -35502524, now seen corresponding path program 3 times [2020-11-07 04:51:08,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:08,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490420368] [2020-11-07 04:51:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:08,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:08,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:08,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:08,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 04:51:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:08,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-07 04:51:08,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490420368] [2020-11-07 04:51:08,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:08,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 04:51:08,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240550904] [2020-11-07 04:51:08,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 04:51:08,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:08,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 04:51:08,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-11-07 04:51:08,842 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2020-11-07 04:51:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:10,423 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-11-07 04:51:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 04:51:10,423 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-11-07 04:51:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:10,429 INFO L225 Difference]: With dead ends: 66 [2020-11-07 04:51:10,429 INFO L226 Difference]: Without dead ends: 59 [2020-11-07 04:51:10,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 04:51:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-07 04:51:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-11-07 04:51:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-07 04:51:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-11-07 04:51:10,460 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 65 [2020-11-07 04:51:10,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:10,461 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-11-07 04:51:10,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 04:51:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-11-07 04:51:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-07 04:51:10,464 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:10,464 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2020-11-07 04:51:10,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 04:51:10,465 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:10,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:10,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2084461945, now seen corresponding path program 4 times [2020-11-07 04:51:10,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:10,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362137693] [2020-11-07 04:51:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:10,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:10,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:10,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:10,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 04:51:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:10,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:11,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-07 04:51:11,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362137693] [2020-11-07 04:51:11,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:11,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-11-07 04:51:11,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056020273] [2020-11-07 04:51:11,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 04:51:11,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:11,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 04:51:11,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-11-07 04:51:11,115 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 21 states. [2020-11-07 04:51:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:13,069 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-11-07 04:51:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 04:51:13,070 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 75 [2020-11-07 04:51:13,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:13,071 INFO L225 Difference]: With dead ends: 71 [2020-11-07 04:51:13,071 INFO L226 Difference]: Without dead ends: 64 [2020-11-07 04:51:13,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 04:51:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-07 04:51:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-11-07 04:51:13,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-07 04:51:13,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-11-07 04:51:13,110 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 75 [2020-11-07 04:51:13,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:13,112 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-11-07 04:51:13,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 04:51:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-11-07 04:51:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 04:51:13,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:13,114 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 04:51:13,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 04:51:13,114 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:13,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:13,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1152977444, now seen corresponding path program 5 times [2020-11-07 04:51:13,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:13,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904777160] [2020-11-07 04:51:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:13,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:13,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:13,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:13,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 04:51:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:13,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:13,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:13,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 17 proven. 61 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-07 04:51:13,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904777160] [2020-11-07 04:51:13,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:13,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-11-07 04:51:13,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139048162] [2020-11-07 04:51:13,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 04:51:13,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:13,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 04:51:13,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-11-07 04:51:13,912 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 23 states. [2020-11-07 04:51:14,699 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 04:51:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:16,157 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-11-07 04:51:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 04:51:16,157 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-11-07 04:51:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:16,159 INFO L225 Difference]: With dead ends: 76 [2020-11-07 04:51:16,159 INFO L226 Difference]: Without dead ends: 69 [2020-11-07 04:51:16,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 04:51:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-07 04:51:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-11-07 04:51:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-07 04:51:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-11-07 04:51:16,179 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 85 [2020-11-07 04:51:16,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:16,180 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-11-07 04:51:16,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 04:51:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-11-07 04:51:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 04:51:16,181 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:16,181 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-11-07 04:51:16,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 04:51:16,182 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:16,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:16,182 INFO L82 PathProgramCache]: Analyzing trace with hash 644328217, now seen corresponding path program 6 times [2020-11-07 04:51:16,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:16,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576512595] [2020-11-07 04:51:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:16,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:16,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:16,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:16,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 04:51:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:16,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:16,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:16,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:16,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 22 proven. 88 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-07 04:51:16,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576512595] [2020-11-07 04:51:16,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:16,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-11-07 04:51:16,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809449714] [2020-11-07 04:51:16,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 04:51:16,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:16,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 04:51:16,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-11-07 04:51:16,981 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 25 states. [2020-11-07 04:51:17,857 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-11-07 04:51:19,667 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 04:51:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:19,837 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-11-07 04:51:19,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 04:51:19,838 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-11-07 04:51:19,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:19,840 INFO L225 Difference]: With dead ends: 81 [2020-11-07 04:51:19,840 INFO L226 Difference]: Without dead ends: 74 [2020-11-07 04:51:19,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=328, Invalid=2024, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 04:51:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-07 04:51:19,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2020-11-07 04:51:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-07 04:51:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-11-07 04:51:19,862 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 95 [2020-11-07 04:51:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:19,862 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-11-07 04:51:19,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 04:51:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-11-07 04:51:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 04:51:19,864 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:19,864 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-11-07 04:51:19,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 04:51:19,865 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:19,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1618724431, now seen corresponding path program 7 times [2020-11-07 04:51:19,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:19,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903112980] [2020-11-07 04:51:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:19,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:19,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:20,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:20,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:20,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 04:51:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:20,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:20,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:20,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 19 proven. 95 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-11-07 04:51:20,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903112980] [2020-11-07 04:51:20,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:20,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-11-07 04:51:20,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682476448] [2020-11-07 04:51:20,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 04:51:20,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:20,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 04:51:20,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-11-07 04:51:20,714 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 25 states. [2020-11-07 04:51:21,628 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:51:22,145 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:51:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:23,446 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-11-07 04:51:23,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 04:51:23,446 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-11-07 04:51:23,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:23,448 INFO L225 Difference]: With dead ends: 85 [2020-11-07 04:51:23,448 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 04:51:23,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 04:51:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 04:51:23,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-11-07 04:51:23,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 04:51:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-11-07 04:51:23,480 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 95 [2020-11-07 04:51:23,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:23,480 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-11-07 04:51:23,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 04:51:23,480 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-11-07 04:51:23,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 04:51:23,482 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:23,482 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-11-07 04:51:23,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 04:51:23,483 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:23,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:23,483 INFO L82 PathProgramCache]: Analyzing trace with hash -312906364, now seen corresponding path program 8 times [2020-11-07 04:51:23,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:23,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169323893] [2020-11-07 04:51:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:23,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:23,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:23,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:23,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:23,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 04:51:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:23,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:24,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:24,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:24,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 24 proven. 129 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-11-07 04:51:24,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169323893] [2020-11-07 04:51:24,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:24,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-11-07 04:51:24,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495754601] [2020-11-07 04:51:24,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 04:51:24,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:24,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 04:51:24,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-11-07 04:51:24,387 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 27 states. [2020-11-07 04:51:25,364 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:51:25,883 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-11-07 04:51:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:27,576 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-11-07 04:51:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 04:51:27,577 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-11-07 04:51:27,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:27,579 INFO L225 Difference]: With dead ends: 85 [2020-11-07 04:51:27,579 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 04:51:27,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=337, Invalid=2213, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 04:51:27,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 04:51:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-11-07 04:51:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 04:51:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-11-07 04:51:27,602 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 105 [2020-11-07 04:51:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:27,603 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-11-07 04:51:27,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 04:51:27,603 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-11-07 04:51:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-07 04:51:27,604 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:27,604 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2020-11-07 04:51:27,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 04:51:27,605 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:27,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1494124015, now seen corresponding path program 9 times [2020-11-07 04:51:27,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:27,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494902979] [2020-11-07 04:51:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:27,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:27,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:27,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:27,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:28,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 04:51:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:28,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-07 04:51:28,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494902979] [2020-11-07 04:51:28,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:28,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-11-07 04:51:28,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473341077] [2020-11-07 04:51:28,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 04:51:28,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:28,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 04:51:28,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-11-07 04:51:28,173 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 21 states. [2020-11-07 04:51:29,018 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 04:51:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:30,222 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-11-07 04:51:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 04:51:30,223 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 75 [2020-11-07 04:51:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:30,224 INFO L225 Difference]: With dead ends: 85 [2020-11-07 04:51:30,224 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 04:51:30,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 04:51:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 04:51:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-11-07 04:51:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 04:51:30,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-11-07 04:51:30,255 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 75 [2020-11-07 04:51:30,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:30,256 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-11-07 04:51:30,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 04:51:30,256 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-11-07 04:51:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 04:51:30,259 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:30,259 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 04:51:30,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 04:51:30,260 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:30,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1926544540, now seen corresponding path program 10 times [2020-11-07 04:51:30,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:30,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038360258] [2020-11-07 04:51:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:30,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:30,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:30,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:30,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:30,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 04:51:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:30,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:30,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-07 04:51:30,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038360258] [2020-11-07 04:51:30,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:30,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 04:51:30,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052964984] [2020-11-07 04:51:30,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 04:51:30,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:30,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 04:51:30,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-11-07 04:51:30,703 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 18 states. [2020-11-07 04:51:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:32,394 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-11-07 04:51:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 04:51:32,394 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-11-07 04:51:32,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:32,396 INFO L225 Difference]: With dead ends: 85 [2020-11-07 04:51:32,396 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 04:51:32,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 04:51:32,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 04:51:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2020-11-07 04:51:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-07 04:51:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-11-07 04:51:32,418 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 85 [2020-11-07 04:51:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:32,419 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-11-07 04:51:32,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 04:51:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-11-07 04:51:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 04:51:32,420 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:32,421 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-11-07 04:51:32,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 04:51:32,421 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:32,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1209072124, now seen corresponding path program 11 times [2020-11-07 04:51:32,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:32,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6819725] [2020-11-07 04:51:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:32,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:32,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:32,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:32,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 04:51:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:32,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:32,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:33,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:33,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:33,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 27 proven. 120 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-11-07 04:51:33,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6819725] [2020-11-07 04:51:33,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:33,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-11-07 04:51:33,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778101736] [2020-11-07 04:51:33,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 04:51:33,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:33,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 04:51:33,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-11-07 04:51:33,382 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 27 states. [2020-11-07 04:51:34,299 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-11-07 04:51:36,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:36,699 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-11-07 04:51:36,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 04:51:36,702 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-11-07 04:51:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:36,703 INFO L225 Difference]: With dead ends: 90 [2020-11-07 04:51:36,703 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 04:51:36,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 04:51:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 04:51:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-11-07 04:51:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 04:51:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-11-07 04:51:36,725 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 105 [2020-11-07 04:51:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:36,725 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-11-07 04:51:36,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 04:51:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-11-07 04:51:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 04:51:36,727 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:36,727 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-11-07 04:51:36,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 04:51:36,728 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:36,728 INFO L82 PathProgramCache]: Analyzing trace with hash -793968977, now seen corresponding path program 12 times [2020-11-07 04:51:36,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:36,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303710193] [2020-11-07 04:51:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:36,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:36,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:36,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:37,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:37,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 04:51:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:37,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:37,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:37,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:37,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:37,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 29 proven. 168 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-11-07 04:51:37,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303710193] [2020-11-07 04:51:37,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:37,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-11-07 04:51:37,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539442386] [2020-11-07 04:51:37,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 04:51:37,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:37,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 04:51:37,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-11-07 04:51:37,805 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 29 states. [2020-11-07 04:51:38,842 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:51:39,402 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:51:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:41,552 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-11-07 04:51:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 04:51:41,553 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 04:51:41,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:41,555 INFO L225 Difference]: With dead ends: 90 [2020-11-07 04:51:41,556 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 04:51:41,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=384, Invalid=2696, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 04:51:41,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 04:51:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2020-11-07 04:51:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-07 04:51:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-11-07 04:51:41,587 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 115 [2020-11-07 04:51:41,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:41,587 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-11-07 04:51:41,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 04:51:41,588 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-11-07 04:51:41,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 04:51:41,589 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:41,589 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-11-07 04:51:41,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 04:51:41,590 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:41,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:41,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1149586151, now seen corresponding path program 13 times [2020-11-07 04:51:41,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:41,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811173889] [2020-11-07 04:51:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:41,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:41,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:41,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:41,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:42,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:42,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 04:51:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:42,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:42,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-11-07 04:51:42,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811173889] [2020-11-07 04:51:42,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:42,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-11-07 04:51:42,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842368762] [2020-11-07 04:51:42,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 04:51:42,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 04:51:42,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-11-07 04:51:42,402 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 25 states. [2020-11-07 04:51:43,322 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:51:43,820 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:51:43,979 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:51:45,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:45,111 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-11-07 04:51:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 04:51:45,112 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-11-07 04:51:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:45,115 INFO L225 Difference]: With dead ends: 90 [2020-11-07 04:51:45,115 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 04:51:45,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 04:51:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 04:51:45,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-11-07 04:51:45,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 04:51:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-11-07 04:51:45,141 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 95 [2020-11-07 04:51:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:45,141 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-11-07 04:51:45,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 04:51:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-11-07 04:51:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 04:51:45,145 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:45,145 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 04:51:45,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 04:51:45,146 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:45,146 INFO L82 PathProgramCache]: Analyzing trace with hash 144287204, now seen corresponding path program 14 times [2020-11-07 04:51:45,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:45,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791729616] [2020-11-07 04:51:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:45,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:45,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:45,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:45,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:45,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:45,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 04:51:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:45,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 71 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-07 04:51:45,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791729616] [2020-11-07 04:51:45,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:45,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-11-07 04:51:45,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805186701] [2020-11-07 04:51:45,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 04:51:45,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:45,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 04:51:45,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-11-07 04:51:45,827 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 23 states. [2020-11-07 04:51:46,706 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 04:51:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:48,232 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-11-07 04:51:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 04:51:48,234 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-11-07 04:51:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:48,236 INFO L225 Difference]: With dead ends: 90 [2020-11-07 04:51:48,236 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 04:51:48,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 04:51:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 04:51:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-11-07 04:51:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 04:51:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2020-11-07 04:51:48,258 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 85 [2020-11-07 04:51:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:48,258 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2020-11-07 04:51:48,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 04:51:48,258 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2020-11-07 04:51:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 04:51:48,260 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:48,260 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-11-07 04:51:48,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 04:51:48,260 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:48,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1889819076, now seen corresponding path program 15 times [2020-11-07 04:51:48,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:48,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286913063] [2020-11-07 04:51:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:48,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:48,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:48,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:48,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:48,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:48,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 04:51:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:48,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:48,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:48,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-11-07 04:51:48,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286913063] [2020-11-07 04:51:48,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:48,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 04:51:48,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361523823] [2020-11-07 04:51:48,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 04:51:48,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:48,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 04:51:48,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-11-07 04:51:48,887 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 20 states. [2020-11-07 04:51:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:50,907 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-11-07 04:51:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 04:51:50,908 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2020-11-07 04:51:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:50,910 INFO L225 Difference]: With dead ends: 90 [2020-11-07 04:51:50,910 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 04:51:50,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 04:51:50,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 04:51:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-11-07 04:51:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 04:51:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-11-07 04:51:50,932 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 105 [2020-11-07 04:51:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:50,933 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-11-07 04:51:50,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 04:51:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-11-07 04:51:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 04:51:50,934 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:50,935 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-11-07 04:51:50,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 04:51:50,935 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:50,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:50,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1252782777, now seen corresponding path program 16 times [2020-11-07 04:51:50,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:50,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024313434] [2020-11-07 04:51:50,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:51,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:51,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:51,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:51,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:51,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:51,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 04:51:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:51,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:51,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:51,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:51,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 28 proven. 169 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-11-07 04:51:51,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024313434] [2020-11-07 04:51:51,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:51,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-11-07 04:51:51,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377773258] [2020-11-07 04:51:51,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 04:51:51,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:51,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 04:51:51,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-11-07 04:51:51,975 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 29 states. [2020-11-07 04:51:53,026 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:51:53,600 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:51:54,195 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:51:55,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:51:55,694 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-11-07 04:51:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 04:51:55,696 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 04:51:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:51:55,698 INFO L225 Difference]: With dead ends: 90 [2020-11-07 04:51:55,698 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 04:51:55,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 04:51:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 04:51:55,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-11-07 04:51:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 04:51:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-11-07 04:51:55,721 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 115 [2020-11-07 04:51:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:51:55,722 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-11-07 04:51:55,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 04:51:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-11-07 04:51:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 04:51:55,724 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:51:55,724 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-11-07 04:51:55,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 04:51:55,724 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:51:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:51:55,725 INFO L82 PathProgramCache]: Analyzing trace with hash -743029340, now seen corresponding path program 17 times [2020-11-07 04:51:55,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:51:55,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402092476] [2020-11-07 04:51:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:51:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:55,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:51:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:55,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:51:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:55,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:55,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:56,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:56,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 04:51:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:56,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:56,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:56,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:56,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:56,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:51:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:51:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 33 proven. 213 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-11-07 04:51:56,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402092476] [2020-11-07 04:51:56,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:51:56,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-11-07 04:51:56,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421927890] [2020-11-07 04:51:56,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 04:51:56,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:51:56,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 04:51:56,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-11-07 04:51:56,863 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 31 states. [2020-11-07 04:51:57,965 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:51:58,130 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:51:58,559 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:51:59,157 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:52:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:52:00,944 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-11-07 04:52:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 04:52:00,945 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-11-07 04:52:00,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:52:00,946 INFO L225 Difference]: With dead ends: 90 [2020-11-07 04:52:00,946 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 04:52:00,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=393, Invalid=2913, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 04:52:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 04:52:00,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2020-11-07 04:52:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-07 04:52:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-11-07 04:52:00,970 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 125 [2020-11-07 04:52:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:52:00,970 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-11-07 04:52:00,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 04:52:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-11-07 04:52:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 04:52:00,971 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:52:00,972 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-11-07 04:52:00,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 04:52:00,972 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:52:00,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:52:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash -106233671, now seen corresponding path program 18 times [2020-11-07 04:52:00,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:52:00,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939221458] [2020-11-07 04:52:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:52:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:01,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:52:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:01,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:52:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:01,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:01,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 04:52:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:01,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:01,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:01,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:01,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:01,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:01,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 32 proven. 157 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-07 04:52:02,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939221458] [2020-11-07 04:52:02,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:52:02,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-11-07 04:52:02,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59385736] [2020-11-07 04:52:02,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 04:52:02,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:52:02,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 04:52:02,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-11-07 04:52:02,064 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 29 states. [2020-11-07 04:52:03,116 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 04:52:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:52:05,964 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-11-07 04:52:05,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 04:52:05,965 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 04:52:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:52:05,967 INFO L225 Difference]: With dead ends: 95 [2020-11-07 04:52:05,967 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 04:52:05,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=422, Invalid=3000, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 04:52:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 04:52:05,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-11-07 04:52:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 04:52:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-11-07 04:52:05,995 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 115 [2020-11-07 04:52:05,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:52:05,996 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-11-07 04:52:05,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 04:52:05,996 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-11-07 04:52:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 04:52:05,997 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:52:05,997 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-11-07 04:52:05,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 04:52:05,997 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:52:05,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:52:05,998 INFO L82 PathProgramCache]: Analyzing trace with hash 202792868, now seen corresponding path program 19 times [2020-11-07 04:52:05,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:52:05,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331897259] [2020-11-07 04:52:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:52:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:06,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:52:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:06,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:52:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:06,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:06,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:06,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 04:52:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:06,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:06,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:06,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:06,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:06,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:07,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 34 proven. 212 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-11-07 04:52:07,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331897259] [2020-11-07 04:52:07,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:52:07,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-11-07 04:52:07,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667219248] [2020-11-07 04:52:07,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 04:52:07,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:52:07,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 04:52:07,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-11-07 04:52:07,259 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 31 states. [2020-11-07 04:52:08,432 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:52:08,591 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:52:08,788 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:52:09,041 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:52:09,234 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:52:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:52:11,986 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2020-11-07 04:52:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 04:52:11,990 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-11-07 04:52:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:52:11,991 INFO L225 Difference]: With dead ends: 99 [2020-11-07 04:52:11,992 INFO L226 Difference]: Without dead ends: 92 [2020-11-07 04:52:11,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=431, Invalid=3229, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 04:52:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-07 04:52:12,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2020-11-07 04:52:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 04:52:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-11-07 04:52:12,019 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 125 [2020-11-07 04:52:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:52:12,020 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-11-07 04:52:12,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 04:52:12,020 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-11-07 04:52:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 04:52:12,021 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:52:12,021 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-11-07 04:52:12,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 04:52:12,021 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:52:12,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:52:12,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1616955303, now seen corresponding path program 20 times [2020-11-07 04:52:12,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:52:12,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357414589] [2020-11-07 04:52:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:52:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:12,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:52:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:12,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:52:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:12,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:12,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:12,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:12,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 04:52:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:12,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:12,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:12,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:13,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:13,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:13,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 38 proven. 262 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-11-07 04:52:13,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357414589] [2020-11-07 04:52:13,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:52:13,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-11-07 04:52:13,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763893827] [2020-11-07 04:52:13,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 04:52:13,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:52:13,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 04:52:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 04:52:13,506 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 33 states. [2020-11-07 04:52:14,812 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:52:15,433 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:52:16,097 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:52:16,268 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:52:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:52:18,812 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-11-07 04:52:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 04:52:18,813 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 04:52:18,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:52:18,815 INFO L225 Difference]: With dead ends: 95 [2020-11-07 04:52:18,815 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 04:52:18,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 04:52:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 04:52:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2020-11-07 04:52:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 04:52:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-11-07 04:52:18,842 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 135 [2020-11-07 04:52:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:52:18,842 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-11-07 04:52:18,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 04:52:18,842 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-11-07 04:52:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 04:52:18,843 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:52:18,843 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-11-07 04:52:18,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 04:52:18,844 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:52:18,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:52:18,844 INFO L82 PathProgramCache]: Analyzing trace with hash 355439567, now seen corresponding path program 21 times [2020-11-07 04:52:18,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:52:18,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074839457] [2020-11-07 04:52:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:52:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:18,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:52:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:18,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:52:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:19,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:19,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:19,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:19,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:19,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 04:52:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:19,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 9 proven. 101 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-07 04:52:19,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074839457] [2020-11-07 04:52:19,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:52:19,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-11-07 04:52:19,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85314279] [2020-11-07 04:52:19,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 04:52:19,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:52:19,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 04:52:19,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-11-07 04:52:19,665 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 25 states. [2020-11-07 04:52:20,622 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-11-07 04:52:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:52:22,819 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-11-07 04:52:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 04:52:22,819 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 95 [2020-11-07 04:52:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:52:22,820 INFO L225 Difference]: With dead ends: 95 [2020-11-07 04:52:22,820 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 04:52:22,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=328, Invalid=2024, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 04:52:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 04:52:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-11-07 04:52:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 04:52:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2020-11-07 04:52:22,851 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 95 [2020-11-07 04:52:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:52:22,851 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2020-11-07 04:52:22,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 04:52:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2020-11-07 04:52:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 04:52:22,852 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:52:22,852 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-11-07 04:52:22,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 04:52:22,853 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:52:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:52:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1751846044, now seen corresponding path program 22 times [2020-11-07 04:52:22,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:52:22,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682102239] [2020-11-07 04:52:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:52:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:22,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:52:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:22,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:52:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:23,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:23,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:23,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:23,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:23,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 04:52:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:23,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:23,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:23,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:23,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 30 proven. 194 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-11-07 04:52:23,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682102239] [2020-11-07 04:52:23,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:52:23,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-07 04:52:23,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699674125] [2020-11-07 04:52:23,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 04:52:23,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:52:23,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 04:52:23,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-11-07 04:52:23,660 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand 22 states. [2020-11-07 04:52:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:52:26,398 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2020-11-07 04:52:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 04:52:26,399 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 125 [2020-11-07 04:52:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:52:26,400 INFO L225 Difference]: With dead ends: 95 [2020-11-07 04:52:26,401 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 04:52:26,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=314, Invalid=1756, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 04:52:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 04:52:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-11-07 04:52:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 04:52:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2020-11-07 04:52:26,424 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 125 [2020-11-07 04:52:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:52:26,424 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2020-11-07 04:52:26,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 04:52:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2020-11-07 04:52:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 04:52:26,425 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:52:26,425 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-11-07 04:52:26,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 04:52:26,426 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:52:26,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:52:26,426 INFO L82 PathProgramCache]: Analyzing trace with hash 960264516, now seen corresponding path program 23 times [2020-11-07 04:52:26,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:52:26,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613492827] [2020-11-07 04:52:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:52:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:26,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:52:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:26,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:52:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:26,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:26,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:26,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:26,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:27,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 04:52:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:27,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:27,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 20 proven. 133 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-11-07 04:52:27,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613492827] [2020-11-07 04:52:27,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:52:27,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-11-07 04:52:27,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8015052] [2020-11-07 04:52:27,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 04:52:27,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:52:27,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 04:52:27,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-11-07 04:52:27,400 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand 27 states. [2020-11-07 04:52:28,465 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:52:28,619 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:52:29,037 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-11-07 04:52:29,218 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:52:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:52:30,894 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-11-07 04:52:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 04:52:30,895 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-11-07 04:52:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:52:30,897 INFO L225 Difference]: With dead ends: 95 [2020-11-07 04:52:30,897 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 04:52:30,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=337, Invalid=2213, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 04:52:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 04:52:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-11-07 04:52:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 04:52:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2020-11-07 04:52:30,932 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 105 [2020-11-07 04:52:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:52:30,932 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2020-11-07 04:52:30,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 04:52:30,932 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2020-11-07 04:52:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 04:52:30,934 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:52:30,934 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-11-07 04:52:30,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 04:52:30,934 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:52:30,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:52:30,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1939135441, now seen corresponding path program 24 times [2020-11-07 04:52:30,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:52:30,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908681942] [2020-11-07 04:52:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:52:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:31,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:52:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:31,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:52:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:31,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:31,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:31,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:31,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:31,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 04:52:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:31,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:31,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:31,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 25 proven. 172 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-11-07 04:52:32,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908681942] [2020-11-07 04:52:32,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:52:32,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-11-07 04:52:32,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094034255] [2020-11-07 04:52:32,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 04:52:32,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:52:32,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 04:52:32,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-11-07 04:52:32,085 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 29 states. [2020-11-07 04:52:33,154 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:52:33,308 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:52:33,743 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:52:33,931 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:52:34,352 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:52:34,508 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:52:35,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:52:35,669 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2020-11-07 04:52:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 04:52:35,670 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 04:52:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:52:35,672 INFO L225 Difference]: With dead ends: 95 [2020-11-07 04:52:35,672 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 04:52:35,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 04:52:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 04:52:35,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-11-07 04:52:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 04:52:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-11-07 04:52:35,697 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 115 [2020-11-07 04:52:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:52:35,697 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-11-07 04:52:35,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 04:52:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-11-07 04:52:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 04:52:35,699 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:52:35,699 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-11-07 04:52:35,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 04:52:35,699 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:52:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:52:35,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1176677519, now seen corresponding path program 25 times [2020-11-07 04:52:35,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:52:35,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216091901] [2020-11-07 04:52:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:52:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:35,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:52:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:35,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:52:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:35,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:36,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:36,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:36,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:36,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 04:52:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:36,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:36,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:36,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:36,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:37,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 37 proven. 263 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-11-07 04:52:37,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216091901] [2020-11-07 04:52:37,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:52:37,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-11-07 04:52:37,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677739062] [2020-11-07 04:52:37,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 04:52:37,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:52:37,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 04:52:37,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 04:52:37,259 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 33 states. [2020-11-07 04:52:38,459 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:52:39,061 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:52:39,487 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:52:39,733 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:52:39,905 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:52:40,109 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:52:40,338 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:52:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:52:41,755 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-11-07 04:52:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 04:52:41,757 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 04:52:41,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:52:41,758 INFO L225 Difference]: With dead ends: 95 [2020-11-07 04:52:41,758 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 04:52:41,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=402, Invalid=3138, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 04:52:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 04:52:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-11-07 04:52:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 04:52:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-11-07 04:52:41,786 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 135 [2020-11-07 04:52:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:52:41,786 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-11-07 04:52:41,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 04:52:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-11-07 04:52:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 04:52:41,787 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:52:41,787 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-11-07 04:52:41,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 04:52:41,788 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:52:41,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:52:41,788 INFO L82 PathProgramCache]: Analyzing trace with hash -936102524, now seen corresponding path program 26 times [2020-11-07 04:52:41,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:52:41,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710204497] [2020-11-07 04:52:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:52:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:41,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:52:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:41,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:52:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:42,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:42,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:42,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:42,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:42,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 04:52:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:42,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:42,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:42,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:42,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:43,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:43,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 42 proven. 317 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-07 04:52:43,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710204497] [2020-11-07 04:52:43,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:52:43,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-11-07 04:52:43,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976217613] [2020-11-07 04:52:43,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 04:52:43,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:52:43,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 04:52:43,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 04:52:43,459 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 35 states. [2020-11-07 04:52:44,719 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:52:44,902 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:52:45,403 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:52:45,603 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:52:45,875 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:52:46,096 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:52:46,281 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:52:46,537 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:52:46,776 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:52:46,963 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:52:48,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:52:48,972 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-11-07 04:52:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 04:52:48,973 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 04:52:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:52:48,975 INFO L225 Difference]: With dead ends: 95 [2020-11-07 04:52:48,975 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 04:52:48,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=449, Invalid=3711, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 04:52:48,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 04:52:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2020-11-07 04:52:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 04:52:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-11-07 04:52:48,998 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 145 [2020-11-07 04:52:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:52:48,998 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-11-07 04:52:48,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 04:52:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-11-07 04:52:48,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 04:52:49,000 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:52:49,000 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-11-07 04:52:49,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 04:52:49,000 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:52:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:52:49,001 INFO L82 PathProgramCache]: Analyzing trace with hash -319407644, now seen corresponding path program 27 times [2020-11-07 04:52:49,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:52:49,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389576786] [2020-11-07 04:52:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:52:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:49,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:52:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:49,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:52:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:49,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:49,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 04:52:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:49,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:49,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:49,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:49,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:49,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:49,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:50,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 37 proven. 199 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-11-07 04:52:50,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389576786] [2020-11-07 04:52:50,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:52:50,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-11-07 04:52:50,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445944692] [2020-11-07 04:52:50,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 04:52:50,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:52:50,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 04:52:50,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-11-07 04:52:50,357 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 31 states. [2020-11-07 04:52:51,545 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 04:52:55,144 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 04:52:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:52:55,377 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2020-11-07 04:52:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 04:52:55,378 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-11-07 04:52:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:52:55,380 INFO L225 Difference]: With dead ends: 100 [2020-11-07 04:52:55,380 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 04:52:55,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=469, Invalid=3563, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 04:52:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 04:52:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 04:52:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 04:52:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-11-07 04:52:55,414 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 125 [2020-11-07 04:52:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:52:55,414 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-11-07 04:52:55,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 04:52:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-11-07 04:52:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 04:52:55,415 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:52:55,416 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-11-07 04:52:55,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 04:52:55,416 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:52:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:52:55,416 INFO L82 PathProgramCache]: Analyzing trace with hash -583782641, now seen corresponding path program 28 times [2020-11-07 04:52:55,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:52:55,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882188053] [2020-11-07 04:52:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:52:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:55,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:52:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:55,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:52:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:55,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:55,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:55,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 04:52:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:55,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:56,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:56,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:56,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:56,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:56,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:56,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:52:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:52:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 39 proven. 261 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-11-07 04:52:56,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882188053] [2020-11-07 04:52:56,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:52:56,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-11-07 04:52:56,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942442055] [2020-11-07 04:52:56,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 04:52:56,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:52:56,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 04:52:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 04:52:56,912 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 33 states. [2020-11-07 04:52:57,999 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:52:58,220 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:52:58,399 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:52:58,646 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:52:58,918 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:52:59,118 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:53:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:53:02,624 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-11-07 04:53:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 04:53:02,625 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 04:53:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:53:02,627 INFO L225 Difference]: With dead ends: 104 [2020-11-07 04:53:02,627 INFO L226 Difference]: Without dead ends: 97 [2020-11-07 04:53:02,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=478, Invalid=3812, Unknown=0, NotChecked=0, Total=4290 [2020-11-07 04:53:02,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-07 04:53:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-11-07 04:53:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 04:53:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-11-07 04:53:02,665 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 135 [2020-11-07 04:53:02,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:53:02,665 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-11-07 04:53:02,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 04:53:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-11-07 04:53:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 04:53:02,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:53:02,667 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-11-07 04:53:02,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 04:53:02,667 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:53:02,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:53:02,668 INFO L82 PathProgramCache]: Analyzing trace with hash -482252412, now seen corresponding path program 29 times [2020-11-07 04:53:02,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:53:02,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746216797] [2020-11-07 04:53:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:53:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:02,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:53:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:02,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:53:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:02,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:03,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:03,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:03,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 04:53:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:03,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:03,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:03,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:03,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:04,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:04,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:04,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 43 proven. 316 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-07 04:53:04,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746216797] [2020-11-07 04:53:04,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:53:04,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-11-07 04:53:04,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159585137] [2020-11-07 04:53:04,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 04:53:04,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:53:04,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 04:53:04,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 04:53:04,518 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 35 states. [2020-11-07 04:53:05,885 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:53:06,074 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:53:06,337 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:53:06,615 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:53:06,824 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:07,098 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:07,317 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:53:07,500 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:53:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:53:10,715 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-11-07 04:53:10,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 04:53:10,716 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 04:53:10,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:53:10,718 INFO L225 Difference]: With dead ends: 104 [2020-11-07 04:53:10,718 INFO L226 Difference]: Without dead ends: 97 [2020-11-07 04:53:10,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=487, Invalid=4069, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 04:53:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-07 04:53:10,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-11-07 04:53:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 04:53:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-11-07 04:53:10,754 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 145 [2020-11-07 04:53:10,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:53:10,754 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-11-07 04:53:10,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 04:53:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-11-07 04:53:10,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 04:53:10,755 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:53:10,756 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-11-07 04:53:10,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 04:53:10,756 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:53:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:53:10,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1776823535, now seen corresponding path program 30 times [2020-11-07 04:53:10,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:53:10,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434986564] [2020-11-07 04:53:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:53:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:10,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:53:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:10,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:53:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:11,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:11,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:11,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:11,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:11,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 04:53:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:11,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:11,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:11,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:12,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:12,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:12,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:12,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 47 proven. 376 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-11-07 04:53:12,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434986564] [2020-11-07 04:53:12,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:53:12,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-11-07 04:53:12,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297095567] [2020-11-07 04:53:12,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 04:53:12,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:53:12,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 04:53:12,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 04:53:12,723 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 37 states. [2020-11-07 04:53:13,842 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:53:14,072 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:53:14,515 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:53:14,795 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:53:15,005 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:15,279 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:15,507 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:53:15,693 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:15,951 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:16,192 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:53:16,382 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:53:19,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:53:19,000 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-11-07 04:53:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 04:53:19,002 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 04:53:19,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:53:19,004 INFO L225 Difference]: With dead ends: 100 [2020-11-07 04:53:19,004 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 04:53:19,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=496, Invalid=4334, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 04:53:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 04:53:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-11-07 04:53:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 04:53:19,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-11-07 04:53:19,030 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 155 [2020-11-07 04:53:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:53:19,030 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-11-07 04:53:19,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 04:53:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-11-07 04:53:19,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-07 04:53:19,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:53:19,032 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-11-07 04:53:19,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 04:53:19,032 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:53:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:53:19,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1518465660, now seen corresponding path program 31 times [2020-11-07 04:53:19,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:53:19,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806907402] [2020-11-07 04:53:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:53:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:19,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:53:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:19,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:53:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:19,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:19,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:19,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:19,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:19,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:19,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 04:53:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:20,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 11 proven. 136 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-11-07 04:53:20,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806907402] [2020-11-07 04:53:20,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:53:20,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-11-07 04:53:20,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495505026] [2020-11-07 04:53:20,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 04:53:20,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:53:20,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 04:53:20,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-11-07 04:53:20,165 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 27 states. [2020-11-07 04:53:21,239 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-11-07 04:53:23,741 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-11-07 04:53:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:53:23,914 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2020-11-07 04:53:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 04:53:23,915 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-11-07 04:53:23,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:53:23,917 INFO L225 Difference]: With dead ends: 100 [2020-11-07 04:53:23,917 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 04:53:23,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 04:53:23,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 04:53:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 04:53:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 04:53:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2020-11-07 04:53:23,950 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 105 [2020-11-07 04:53:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:53:23,950 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2020-11-07 04:53:23,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 04:53:23,951 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2020-11-07 04:53:23,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 04:53:23,952 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:53:23,952 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-11-07 04:53:23,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 04:53:23,952 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:53:23,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:53:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash 501789028, now seen corresponding path program 32 times [2020-11-07 04:53:23,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:53:23,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178769179] [2020-11-07 04:53:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:53:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:24,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:53:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:24,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:53:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:24,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:24,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:24,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:24,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:24,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:24,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 04:53:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:24,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:25,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:25,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 29 proven. 217 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-11-07 04:53:25,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178769179] [2020-11-07 04:53:25,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:53:25,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-11-07 04:53:25,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344060477] [2020-11-07 04:53:25,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 04:53:25,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:53:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 04:53:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-11-07 04:53:25,346 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand 31 states. [2020-11-07 04:53:26,526 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:53:26,696 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:53:26,897 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:53:27,148 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:53:27,344 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:27,575 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:27,802 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:53:27,971 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:53:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:53:29,876 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2020-11-07 04:53:29,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 04:53:29,877 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-11-07 04:53:29,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:53:29,879 INFO L225 Difference]: With dead ends: 100 [2020-11-07 04:53:29,879 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 04:53:29,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=393, Invalid=2913, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 04:53:29,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 04:53:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 04:53:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 04:53:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions. [2020-11-07 04:53:29,904 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 125 [2020-11-07 04:53:29,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:53:29,904 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 111 transitions. [2020-11-07 04:53:29,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 04:53:29,904 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions. [2020-11-07 04:53:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 04:53:29,905 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:53:29,905 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-11-07 04:53:29,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 04:53:29,905 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:53:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:53:29,906 INFO L82 PathProgramCache]: Analyzing trace with hash -90226087, now seen corresponding path program 33 times [2020-11-07 04:53:29,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:53:29,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497456142] [2020-11-07 04:53:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:53:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:30,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:53:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:30,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:53:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:30,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:30,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:30,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:30,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:30,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:30,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 04:53:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:30,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:31,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:31,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:31,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 34 proven. 266 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-11-07 04:53:31,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497456142] [2020-11-07 04:53:31,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:53:31,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-11-07 04:53:31,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938701477] [2020-11-07 04:53:31,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 04:53:31,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:53:31,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 04:53:31,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 04:53:31,436 INFO L87 Difference]: Start difference. First operand 88 states and 111 transitions. Second operand 33 states. [2020-11-07 04:53:32,465 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:53:32,673 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:53:32,839 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:53:33,046 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:53:33,293 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:53:33,486 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:33,733 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:33,974 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:53:34,156 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:34,368 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:34,608 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:53:34,795 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:53:36,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:53:36,171 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2020-11-07 04:53:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 04:53:36,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 04:53:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:53:36,174 INFO L225 Difference]: With dead ends: 100 [2020-11-07 04:53:36,174 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 04:53:36,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=402, Invalid=3138, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 04:53:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 04:53:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 04:53:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 04:53:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2020-11-07 04:53:36,208 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 135 [2020-11-07 04:53:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:53:36,208 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2020-11-07 04:53:36,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 04:53:36,208 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2020-11-07 04:53:36,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 04:53:36,209 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:53:36,209 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-11-07 04:53:36,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 04:53:36,210 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:53:36,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:53:36,210 INFO L82 PathProgramCache]: Analyzing trace with hash -345081863, now seen corresponding path program 34 times [2020-11-07 04:53:36,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:53:36,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444927263] [2020-11-07 04:53:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:53:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:36,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:53:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:36,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:53:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:36,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:36,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:36,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:36,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:36,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:37,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 04:53:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:37,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:37,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:37,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:37,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:37,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:37,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 46 proven. 377 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-11-07 04:53:38,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444927263] [2020-11-07 04:53:38,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:53:38,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-11-07 04:53:38,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882226394] [2020-11-07 04:53:38,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 04:53:38,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:53:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 04:53:38,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 04:53:38,075 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand 37 states. [2020-11-07 04:53:39,528 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:53:40,205 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:53:40,412 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:40,682 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:40,977 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:53:41,186 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:41,434 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:41,729 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:53:41,924 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:42,171 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:42,453 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:53:42,658 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:53:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:53:44,595 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2020-11-07 04:53:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 04:53:44,597 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 04:53:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:53:44,599 INFO L225 Difference]: With dead ends: 100 [2020-11-07 04:53:44,599 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 04:53:44,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 04:53:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 04:53:44,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 04:53:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 04:53:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-11-07 04:53:44,640 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 155 [2020-11-07 04:53:44,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:53:44,640 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-11-07 04:53:44,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 04:53:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-11-07 04:53:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 04:53:44,641 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:53:44,642 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-11-07 04:53:44,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 04:53:44,642 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:53:44,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:53:44,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1329439012, now seen corresponding path program 35 times [2020-11-07 04:53:44,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:53:44,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073267715] [2020-11-07 04:53:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:53:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:44,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:53:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:44,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:53:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:44,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:44,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:45,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:45,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:45,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:45,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 04:53:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:45,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:45,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:45,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:46,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:46,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:46,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:46,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 51 proven. 441 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-11-07 04:53:46,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073267715] [2020-11-07 04:53:46,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:53:46,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-11-07 04:53:46,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416882403] [2020-11-07 04:53:46,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 04:53:46,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:53:46,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 04:53:46,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 04:53:46,821 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 39 states. [2020-11-07 04:53:48,073 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:53:48,325 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-11-07 04:53:48,527 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:53:48,774 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:53:49,085 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:53:49,312 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:49,627 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:49,919 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:53:50,127 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:50,380 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:50,680 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:53:50,885 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:51,133 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:53:51,436 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:53:51,652 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:53:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:53:54,170 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-11-07 04:53:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 04:53:54,171 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-11-07 04:53:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:53:54,173 INFO L225 Difference]: With dead ends: 100 [2020-11-07 04:53:54,173 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 04:53:54,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=505, Invalid=4607, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 04:53:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 04:53:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 04:53:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 04:53:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2020-11-07 04:53:54,207 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 165 [2020-11-07 04:53:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:53:54,208 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2020-11-07 04:53:54,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 04:53:54,208 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2020-11-07 04:53:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 04:53:54,209 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:53:54,209 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-11-07 04:53:54,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 04:53:54,209 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:53:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:53:54,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1640360775, now seen corresponding path program 36 times [2020-11-07 04:53:54,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:53:54,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716175396] [2020-11-07 04:53:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:53:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:54,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:53:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:54,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:53:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:54,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:54,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:54,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:54,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:54,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:55,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 04:53:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:55,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:55,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:53:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:53:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-11-07 04:53:55,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716175396] [2020-11-07 04:53:55,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:53:55,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-11-07 04:53:55,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857634132] [2020-11-07 04:53:55,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 04:53:55,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:53:55,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 04:53:55,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-11-07 04:53:55,466 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand 29 states. [2020-11-07 04:53:56,526 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:53:56,742 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:53:56,919 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:53:57,139 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:53:57,418 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:53:57,620 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:54:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:54:00,194 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2020-11-07 04:54:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 04:54:00,196 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 04:54:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:54:00,197 INFO L225 Difference]: With dead ends: 100 [2020-11-07 04:54:00,197 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 04:54:00,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=384, Invalid=2696, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 04:54:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 04:54:00,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-11-07 04:54:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 04:54:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-11-07 04:54:00,235 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 115 [2020-11-07 04:54:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:54:00,235 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-11-07 04:54:00,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 04:54:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-11-07 04:54:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 04:54:00,237 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:54:00,237 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-11-07 04:54:00,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 04:54:00,237 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:54:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:54:00,238 INFO L82 PathProgramCache]: Analyzing trace with hash 302157124, now seen corresponding path program 37 times [2020-11-07 04:54:00,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:54:00,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433711952] [2020-11-07 04:54:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:54:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:00,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:54:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:00,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:54:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:00,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:00,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:00,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:00,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:01,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:01,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 04:54:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:01,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:01,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:01,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:01,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:01,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 39 proven. 293 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-11-07 04:54:01,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433711952] [2020-11-07 04:54:01,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:54:01,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-11-07 04:54:01,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479333333] [2020-11-07 04:54:01,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 04:54:01,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:54:01,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 04:54:01,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-11-07 04:54:01,335 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 24 states. [2020-11-07 04:54:05,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:54:05,141 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-11-07 04:54:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 04:54:05,143 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 145 [2020-11-07 04:54:05,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:54:05,144 INFO L225 Difference]: With dead ends: 100 [2020-11-07 04:54:05,144 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 04:54:05,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=361, Invalid=2189, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 04:54:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 04:54:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-11-07 04:54:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 04:54:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-11-07 04:54:05,184 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 145 [2020-11-07 04:54:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:54:05,184 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-11-07 04:54:05,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 04:54:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-11-07 04:54:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 04:54:05,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:54:05,186 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-11-07 04:54:05,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 04:54:05,186 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:54:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:54:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1103733159, now seen corresponding path program 38 times [2020-11-07 04:54:05,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:54:05,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395088274] [2020-11-07 04:54:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:54:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:05,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:54:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:05,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:54:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:05,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:05,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 04:54:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:05,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:05,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:05,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:05,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:06,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:06,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:06,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:06,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-07 04:54:06,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395088274] [2020-11-07 04:54:06,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:54:06,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-11-07 04:54:06,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231926081] [2020-11-07 04:54:06,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 04:54:06,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:54:06,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 04:54:06,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 04:54:06,914 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 33 states. [2020-11-07 04:54:08,007 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-11-07 04:54:08,238 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-11-07 04:54:08,417 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-07 04:54:13,013 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 04:54:13,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:54:13,221 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2020-11-07 04:54:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 04:54:13,223 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 04:54:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:54:13,225 INFO L225 Difference]: With dead ends: 105 [2020-11-07 04:54:13,225 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 04:54:13,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=516, Invalid=4176, Unknown=0, NotChecked=0, Total=4692 [2020-11-07 04:54:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 04:54:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 04:54:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 04:54:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-11-07 04:54:13,259 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 135 [2020-11-07 04:54:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:54:13,259 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-11-07 04:54:13,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 04:54:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-11-07 04:54:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 04:54:13,261 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:54:13,261 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-11-07 04:54:13,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 04:54:13,261 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:54:13,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:54:13,262 INFO L82 PathProgramCache]: Analyzing trace with hash 665852356, now seen corresponding path program 39 times [2020-11-07 04:54:13,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:54:13,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058222618] [2020-11-07 04:54:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:54:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:13,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:54:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:13,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:54:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:13,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:13,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:13,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 04:54:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:13,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:14,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:14,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:14,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:14,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:14,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:14,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:14,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 44 proven. 315 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-07 04:54:15,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058222618] [2020-11-07 04:54:15,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:54:15,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-11-07 04:54:15,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030805783] [2020-11-07 04:54:15,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 04:54:15,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:54:15,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 04:54:15,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 04:54:15,174 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 35 states. [2020-11-07 04:54:16,455 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:54:16,710 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:54:16,909 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:54:17,156 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:54:17,468 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:54:17,704 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:54:22,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:54:22,364 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2020-11-07 04:54:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 04:54:22,366 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 04:54:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:54:22,368 INFO L225 Difference]: With dead ends: 109 [2020-11-07 04:54:22,368 INFO L226 Difference]: Without dead ends: 102 [2020-11-07 04:54:22,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=525, Invalid=4445, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 04:54:22,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-07 04:54:22,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-11-07 04:54:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 04:54:22,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-11-07 04:54:22,411 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 145 [2020-11-07 04:54:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:54:22,412 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-11-07 04:54:22,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 04:54:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-11-07 04:54:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 04:54:22,413 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:54:22,413 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-11-07 04:54:22,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 04:54:22,414 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:54:22,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:54:22,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1635613191, now seen corresponding path program 40 times [2020-11-07 04:54:22,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:54:22,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791121749] [2020-11-07 04:54:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:54:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:22,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:54:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:22,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:54:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:22,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:22,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:22,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:23,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 04:54:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:23,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:23,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:23,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:23,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:23,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:24,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:24,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:24,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 48 proven. 375 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-11-07 04:54:24,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791121749] [2020-11-07 04:54:24,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:54:24,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-11-07 04:54:24,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139862738] [2020-11-07 04:54:24,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 04:54:24,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:54:24,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 04:54:24,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 04:54:24,742 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 37 states. [2020-11-07 04:54:25,962 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:54:26,233 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:54:26,464 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:54:26,764 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:54:27,101 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:54:27,335 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:54:27,640 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:54:27,896 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:54:28,103 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:54:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:54:32,328 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2020-11-07 04:54:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 04:54:32,330 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 04:54:32,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:54:32,332 INFO L225 Difference]: With dead ends: 109 [2020-11-07 04:54:32,332 INFO L226 Difference]: Without dead ends: 102 [2020-11-07 04:54:32,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=534, Invalid=4722, Unknown=0, NotChecked=0, Total=5256 [2020-11-07 04:54:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-07 04:54:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-11-07 04:54:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 04:54:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-11-07 04:54:32,389 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 155 [2020-11-07 04:54:32,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:54:32,390 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-11-07 04:54:32,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 04:54:32,390 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-11-07 04:54:32,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 04:54:32,391 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:54:32,391 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-11-07 04:54:32,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 04:54:32,392 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:54:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:54:32,392 INFO L82 PathProgramCache]: Analyzing trace with hash -43499612, now seen corresponding path program 41 times [2020-11-07 04:54:32,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:54:32,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118857459] [2020-11-07 04:54:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:54:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:32,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:54:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:32,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:54:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:32,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:32,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:32,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:33,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:33,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 04:54:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:33,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:33,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:33,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:34,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:34,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:34,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:34,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:34,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 52 proven. 440 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-11-07 04:54:35,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118857459] [2020-11-07 04:54:35,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:54:35,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-11-07 04:54:35,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451888920] [2020-11-07 04:54:35,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 04:54:35,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:54:35,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 04:54:35,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 04:54:35,060 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 39 states. [2020-11-07 04:54:36,500 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:54:36,768 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:54:36,973 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:54:37,237 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 04:54:37,583 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:54:37,832 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:54:38,148 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:54:38,457 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:54:38,670 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:54:38,934 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:54:39,259 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:54:39,485 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:54:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:54:43,532 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2020-11-07 04:54:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 04:54:43,534 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-11-07 04:54:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:54:43,537 INFO L225 Difference]: With dead ends: 109 [2020-11-07 04:54:43,537 INFO L226 Difference]: Without dead ends: 102 [2020-11-07 04:54:43,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=543, Invalid=5007, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 04:54:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-07 04:54:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2020-11-07 04:54:43,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 04:54:43,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-11-07 04:54:43,569 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 165 [2020-11-07 04:54:43,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:54:43,569 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-11-07 04:54:43,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 04:54:43,569 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-11-07 04:54:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 04:54:43,570 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:54:43,570 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-11-07 04:54:43,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 04:54:43,571 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:54:43,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:54:43,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1893053849, now seen corresponding path program 42 times [2020-11-07 04:54:43,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:54:43,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261004369] [2020-11-07 04:54:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:54:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:43,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:54:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:43,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:54:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:43,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:43,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:44,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:44,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:44,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:44,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 04:54:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:44,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:44,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:45,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:45,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:45,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:45,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:45,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:46,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 56 proven. 510 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-11-07 04:54:46,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261004369] [2020-11-07 04:54:46,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:54:46,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-11-07 04:54:46,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169000158] [2020-11-07 04:54:46,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 04:54:46,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:54:46,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 04:54:46,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 04:54:46,322 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 41 states. [2020-11-07 04:54:47,817 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:54:48,101 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:54:48,326 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:54:48,657 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:54:49,017 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:54:49,292 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:54:49,653 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:54:49,933 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:54:50,157 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:54:50,485 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:54:50,767 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:54:50,991 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:54:51,325 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:54:51,628 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:54:51,857 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:54:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:54:55,544 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2020-11-07 04:54:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 04:54:55,546 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-11-07 04:54:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:54:55,548 INFO L225 Difference]: With dead ends: 105 [2020-11-07 04:54:55,548 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 04:54:55,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=552, Invalid=5300, Unknown=0, NotChecked=0, Total=5852 [2020-11-07 04:54:55,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 04:54:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2020-11-07 04:54:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-07 04:54:55,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-11-07 04:54:55,589 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 175 [2020-11-07 04:54:55,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:54:55,589 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-11-07 04:54:55,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 04:54:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-11-07 04:54:55,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 04:54:55,591 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:54:55,591 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-11-07 04:54:55,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 04:54:55,591 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:54:55,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:54:55,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1520258748, now seen corresponding path program 43 times [2020-11-07 04:54:55,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:54:55,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840602990] [2020-11-07 04:54:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:54:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:55,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:54:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:55,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:54:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:55,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:55,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:56,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:56,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:56,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:56,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:56,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 04:54:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:56,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:57,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:57,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:57,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:54:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:54:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 38 proven. 321 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-07 04:54:57,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840602990] [2020-11-07 04:54:57,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:54:57,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-11-07 04:54:57,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070012821] [2020-11-07 04:54:57,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 04:54:57,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:54:57,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 04:54:57,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 04:54:57,604 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 35 states. [2020-11-07 04:54:58,923 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:54:59,172 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:54:59,392 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:54:59,705 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:55:00,044 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:55:00,298 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:00,630 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:00,890 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:55:01,126 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:01,435 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:01,717 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:55:01,935 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:55:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:55:04,757 INFO L93 Difference]: Finished difference Result 105 states and 132 transitions. [2020-11-07 04:55:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 04:55:04,757 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 04:55:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:55:04,758 INFO L225 Difference]: With dead ends: 105 [2020-11-07 04:55:04,758 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 04:55:04,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=449, Invalid=3711, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 04:55:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 04:55:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 04:55:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 04:55:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2020-11-07 04:55:04,800 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 145 [2020-11-07 04:55:04,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:55:04,801 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2020-11-07 04:55:04,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 04:55:04,801 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2020-11-07 04:55:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 04:55:04,802 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:55:04,802 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-11-07 04:55:04,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 04:55:04,802 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:55:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:55:04,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1472500335, now seen corresponding path program 44 times [2020-11-07 04:55:04,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:55:04,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113989933] [2020-11-07 04:55:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:55:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:04,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:55:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:05,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:55:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:05,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:05,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:05,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:05,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:05,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:05,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:06,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 04:55:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:06,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:06,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:06,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:06,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:07,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 43 proven. 380 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-11-07 04:55:07,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113989933] [2020-11-07 04:55:07,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:55:07,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-11-07 04:55:07,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048333318] [2020-11-07 04:55:07,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 04:55:07,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:55:07,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 04:55:07,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 04:55:07,204 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand 37 states. [2020-11-07 04:55:08,619 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:55:08,893 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:55:09,098 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:55:09,368 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:55:09,743 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:55:09,993 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:10,316 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:10,634 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:55:10,853 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:11,127 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:11,447 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:55:11,666 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:11,952 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:12,280 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:55:12,503 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:55:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:55:14,694 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2020-11-07 04:55:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 04:55:14,697 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 04:55:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:55:14,699 INFO L225 Difference]: With dead ends: 105 [2020-11-07 04:55:14,699 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 04:55:14,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 04:55:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 04:55:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 04:55:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 04:55:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2020-11-07 04:55:14,741 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 155 [2020-11-07 04:55:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:55:14,742 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2020-11-07 04:55:14,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 04:55:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2020-11-07 04:55:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 04:55:14,743 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:55:14,743 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-11-07 04:55:14,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 04:55:14,744 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:55:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:55:14,744 INFO L82 PathProgramCache]: Analyzing trace with hash -526892188, now seen corresponding path program 45 times [2020-11-07 04:55:14,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:55:14,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818796477] [2020-11-07 04:55:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:55:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:14,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:55:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:14,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:55:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 04:55:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:15,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 48 proven. 412 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-11-07 04:55:16,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818796477] [2020-11-07 04:55:16,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:55:16,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-11-07 04:55:16,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651266758] [2020-11-07 04:55:16,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 04:55:16,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:55:16,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 04:55:16,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-11-07 04:55:16,086 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand 26 states. [2020-11-07 04:55:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:55:21,012 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2020-11-07 04:55:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 04:55:21,015 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 165 [2020-11-07 04:55:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:55:21,017 INFO L225 Difference]: With dead ends: 105 [2020-11-07 04:55:21,017 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 04:55:21,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=408, Invalid=2672, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 04:55:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 04:55:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 04:55:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 04:55:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-11-07 04:55:21,059 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 165 [2020-11-07 04:55:21,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:55:21,059 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-11-07 04:55:21,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 04:55:21,059 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-11-07 04:55:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 04:55:21,060 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:55:21,061 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-11-07 04:55:21,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 04:55:21,061 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:55:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:55:21,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2014632367, now seen corresponding path program 46 times [2020-11-07 04:55:21,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:55:21,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800613813] [2020-11-07 04:55:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:55:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:21,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:55:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:21,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:55:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:21,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:21,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:21,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:21,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:21,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:22,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:22,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 04:55:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:22,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 13 proven. 176 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-07 04:55:22,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800613813] [2020-11-07 04:55:22,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:55:22,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-11-07 04:55:22,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704466349] [2020-11-07 04:55:22,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 04:55:22,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:55:22,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 04:55:22,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2020-11-07 04:55:22,493 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 29 states. [2020-11-07 04:55:23,727 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-11-07 04:55:23,971 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 04:55:24,156 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-07 04:55:27,801 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-11-07 04:55:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:55:28,068 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2020-11-07 04:55:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 04:55:28,070 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 04:55:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:55:28,072 INFO L225 Difference]: With dead ends: 105 [2020-11-07 04:55:28,072 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 04:55:28,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=422, Invalid=3000, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 04:55:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 04:55:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 04:55:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 04:55:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2020-11-07 04:55:28,114 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 115 [2020-11-07 04:55:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:55:28,114 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2020-11-07 04:55:28,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 04:55:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2020-11-07 04:55:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 04:55:28,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:55:28,116 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-11-07 04:55:28,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 04:55:28,116 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:55:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:55:28,116 INFO L82 PathProgramCache]: Analyzing trace with hash 981230287, now seen corresponding path program 47 times [2020-11-07 04:55:28,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:55:28,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733923186] [2020-11-07 04:55:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:55:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:28,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:55:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:28,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:55:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:28,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:28,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:28,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:28,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:28,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:29,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:29,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 04:55:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:29,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:29,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:29,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:30,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:30,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:30,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:30,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 55 proven. 511 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-11-07 04:55:30,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733923186] [2020-11-07 04:55:30,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:55:30,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-11-07 04:55:30,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560773948] [2020-11-07 04:55:30,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 04:55:30,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:55:30,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 04:55:30,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 04:55:30,917 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand 41 states. [2020-11-07 04:55:32,522 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:55:32,827 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:55:33,067 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:55:33,416 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:55:33,802 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:55:34,071 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:34,445 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:34,743 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:55:34,979 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:35,327 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:35,631 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:55:35,862 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:36,202 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:36,502 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:55:36,741 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:37,081 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:37,376 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:55:37,609 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:55:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:55:40,119 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2020-11-07 04:55:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 04:55:40,120 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-11-07 04:55:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:55:40,121 INFO L225 Difference]: With dead ends: 105 [2020-11-07 04:55:40,121 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 04:55:40,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=514, Invalid=4888, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 04:55:40,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 04:55:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 04:55:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 04:55:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-11-07 04:55:40,156 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 175 [2020-11-07 04:55:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:55:40,157 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-11-07 04:55:40,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 04:55:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-11-07 04:55:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 04:55:40,158 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:55:40,158 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-11-07 04:55:40,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 04:55:40,158 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:55:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:55:40,158 INFO L82 PathProgramCache]: Analyzing trace with hash -892159473, now seen corresponding path program 48 times [2020-11-07 04:55:40,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:55:40,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393363436] [2020-11-07 04:55:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:55:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:40,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:55:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:40,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:55:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:40,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:40,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:40,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:40,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:40,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:41,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:41,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 04:55:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:41,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:41,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:41,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 33 proven. 267 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-11-07 04:55:42,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393363436] [2020-11-07 04:55:42,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:55:42,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-11-07 04:55:42,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714381008] [2020-11-07 04:55:42,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 04:55:42,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:55:42,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 04:55:42,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 04:55:42,008 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 33 states. [2020-11-07 04:55:43,338 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:55:43,598 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:55:43,813 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:55:44,113 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 04:55:44,441 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:55:44,687 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:55:45,005 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:45,250 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:55:45,448 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:55:48,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:55:48,478 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2020-11-07 04:55:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 04:55:48,480 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 04:55:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:55:48,482 INFO L225 Difference]: With dead ends: 105 [2020-11-07 04:55:48,482 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 04:55:48,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 04:55:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 04:55:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 04:55:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 04:55:48,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2020-11-07 04:55:48,519 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 135 [2020-11-07 04:55:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:55:48,519 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2020-11-07 04:55:48,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 04:55:48,519 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2020-11-07 04:55:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-11-07 04:55:48,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:55:48,520 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-11-07 04:55:48,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 04:55:48,521 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:55:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:55:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash -971334268, now seen corresponding path program 49 times [2020-11-07 04:55:48,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:55:48,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479376096] [2020-11-07 04:55:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:55:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:48,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:55:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:48,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:55:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:48,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:48,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:49,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:49,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:49,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:49,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:49,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 04:55:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:49,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:50,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:50,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:50,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:50,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:51,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:51,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:51,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:55:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:55:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 60 proven. 585 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-11-07 04:55:51,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479376096] [2020-11-07 04:55:51,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:55:51,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-11-07 04:55:51,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112467978] [2020-11-07 04:55:51,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 04:55:51,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:55:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 04:55:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 04:55:51,736 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand 43 states. [2020-11-07 04:55:53,619 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:55:53,952 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:55:54,211 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:55:54,532 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:55:54,961 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:55:55,266 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:55,671 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:56,053 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:55:56,312 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:56,636 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:57,021 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:55:57,282 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:57,604 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:58,002 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:55:58,255 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:58,569 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:55:58,965 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:55:59,238 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:56:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:56:02,797 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2020-11-07 04:56:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 04:56:02,799 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 185 [2020-11-07 04:56:02,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:56:02,801 INFO L225 Difference]: With dead ends: 105 [2020-11-07 04:56:02,801 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 04:56:02,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=561, Invalid=5601, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 04:56:02,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 04:56:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-11-07 04:56:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 04:56:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2020-11-07 04:56:02,849 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 185 [2020-11-07 04:56:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:56:02,849 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2020-11-07 04:56:02,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 04:56:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2020-11-07 04:56:02,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 04:56:02,850 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:56:02,850 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-11-07 04:56:02,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-07 04:56:02,851 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:56:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:56:02,851 INFO L82 PathProgramCache]: Analyzing trace with hash -299112668, now seen corresponding path program 50 times [2020-11-07 04:56:02,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:56:02,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730884061] [2020-11-07 04:56:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:56:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:03,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:56:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:03,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:56:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:03,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:03,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:03,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:03,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:03,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:03,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:04,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 04:56:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:04,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:04,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 28 proven. 218 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-11-07 04:56:04,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730884061] [2020-11-07 04:56:04,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:56:04,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-11-07 04:56:04,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816580312] [2020-11-07 04:56:04,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 04:56:04,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:56:04,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 04:56:04,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-11-07 04:56:04,642 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 31 states. [2020-11-07 04:56:06,026 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:56:06,311 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:56:06,533 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:56:06,809 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:56:07,149 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:56:07,406 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:56:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:56:11,448 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2020-11-07 04:56:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 04:56:11,450 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-11-07 04:56:11,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:56:11,452 INFO L225 Difference]: With dead ends: 105 [2020-11-07 04:56:11,452 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 04:56:11,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=431, Invalid=3229, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 04:56:11,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 04:56:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2020-11-07 04:56:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-07 04:56:11,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-11-07 04:56:11,493 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 125 [2020-11-07 04:56:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:56:11,493 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-11-07 04:56:11,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 04:56:11,493 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-11-07 04:56:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 04:56:11,494 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:56:11,494 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-11-07 04:56:11,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-07 04:56:11,494 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:56:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:56:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1455465924, now seen corresponding path program 51 times [2020-11-07 04:56:11,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:56:11,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517318050] [2020-11-07 04:56:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:56:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:11,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:56:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:11,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:56:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:11,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:11,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 04:56:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:12,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:12,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:12,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:12,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:12,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:12,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:13,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:13,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:13,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 47 proven. 298 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2020-11-07 04:56:14,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517318050] [2020-11-07 04:56:14,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:56:14,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-11-07 04:56:14,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547884408] [2020-11-07 04:56:14,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 04:56:14,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:56:14,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 04:56:14,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 04:56:14,270 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 35 states. [2020-11-07 04:56:16,090 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-11-07 04:56:16,429 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 04:56:16,681 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-07 04:56:24,247 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 04:56:24,453 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-11-07 04:56:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:56:24,458 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2020-11-07 04:56:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 04:56:24,458 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 04:56:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:56:24,459 INFO L225 Difference]: With dead ends: 110 [2020-11-07 04:56:24,460 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 04:56:24,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=563, Invalid=4839, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 04:56:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 04:56:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 04:56:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 04:56:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-11-07 04:56:24,509 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 145 [2020-11-07 04:56:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:56:24,509 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-11-07 04:56:24,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 04:56:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-11-07 04:56:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 04:56:24,510 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:56:24,511 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-11-07 04:56:24,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-07 04:56:24,511 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:56:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:56:24,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1193498479, now seen corresponding path program 52 times [2020-11-07 04:56:24,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:56:24,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80095484] [2020-11-07 04:56:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:56:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:24,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:56:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:24,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:56:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:24,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:25,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:25,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 04:56:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:25,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:25,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:25,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:25,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:26,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:26,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:26,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:26,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:27,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 49 proven. 374 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-11-07 04:56:27,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80095484] [2020-11-07 04:56:27,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:56:27,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-11-07 04:56:27,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553558493] [2020-11-07 04:56:27,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 04:56:27,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:56:27,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 04:56:27,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 04:56:27,413 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 37 states. [2020-11-07 04:56:29,121 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:56:29,480 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:56:29,750 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:56:30,081 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:56:30,501 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:56:30,816 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:56:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:56:38,057 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-11-07 04:56:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 04:56:38,061 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 04:56:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:56:38,063 INFO L225 Difference]: With dead ends: 114 [2020-11-07 04:56:38,063 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 04:56:38,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=572, Invalid=5128, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 04:56:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 04:56:38,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-11-07 04:56:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 04:56:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-11-07 04:56:38,117 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 155 [2020-11-07 04:56:38,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:56:38,118 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-11-07 04:56:38,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 04:56:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-11-07 04:56:38,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 04:56:38,119 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:56:38,119 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-11-07 04:56:38,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-07 04:56:38,120 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:56:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:56:38,120 INFO L82 PathProgramCache]: Analyzing trace with hash 775406948, now seen corresponding path program 53 times [2020-11-07 04:56:38,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:56:38,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012274004] [2020-11-07 04:56:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:56:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:38,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:56:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:38,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:56:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:38,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:38,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:38,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:38,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 04:56:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:39,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:39,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:39,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:39,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:39,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:40,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:40,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:40,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:40,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 53 proven. 439 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-11-07 04:56:41,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012274004] [2020-11-07 04:56:41,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:56:41,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-11-07 04:56:41,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717291503] [2020-11-07 04:56:41,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 04:56:41,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:56:41,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 04:56:41,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 04:56:41,249 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 39 states. [2020-11-07 04:56:43,297 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:56:43,655 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:56:43,939 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:56:44,282 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:56:44,776 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:56:45,120 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:56:45,592 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:56:46,037 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:56:46,321 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:56:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:56:53,654 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-11-07 04:56:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 04:56:53,657 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-11-07 04:56:53,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:56:53,659 INFO L225 Difference]: With dead ends: 114 [2020-11-07 04:56:53,659 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 04:56:53,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=581, Invalid=5425, Unknown=0, NotChecked=0, Total=6006 [2020-11-07 04:56:53,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 04:56:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-11-07 04:56:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 04:56:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-11-07 04:56:53,713 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 165 [2020-11-07 04:56:53,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:56:53,714 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-11-07 04:56:53,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 04:56:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-11-07 04:56:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 04:56:53,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:56:53,715 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-11-07 04:56:53,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-07 04:56:53,716 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:56:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:56:53,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1395808945, now seen corresponding path program 54 times [2020-11-07 04:56:53,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:56:53,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795525555] [2020-11-07 04:56:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:56:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:53,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:56:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:53,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:56:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:54,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:54,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:54,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:54,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:54,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 04:56:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:54,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:55,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:55,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:55,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:55,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:56,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:56,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:56,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:56,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:56:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:56:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 57 proven. 509 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-11-07 04:56:57,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795525555] [2020-11-07 04:56:57,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:56:57,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-11-07 04:56:57,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617012099] [2020-11-07 04:56:57,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 04:56:57,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:56:57,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 04:56:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 04:56:57,176 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 41 states. [2020-11-07 04:56:59,047 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:56:59,393 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:56:59,667 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:57:00,021 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:57:00,481 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:57:00,831 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:01,278 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:01,709 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:57:02,010 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:02,382 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:02,825 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:57:03,114 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:57:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:57:09,204 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-11-07 04:57:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 04:57:09,207 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-11-07 04:57:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:57:09,209 INFO L225 Difference]: With dead ends: 114 [2020-11-07 04:57:09,209 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 04:57:09,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=590, Invalid=5730, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 04:57:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 04:57:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-11-07 04:57:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 04:57:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-11-07 04:57:09,250 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 175 [2020-11-07 04:57:09,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:57:09,250 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-11-07 04:57:09,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 04:57:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-11-07 04:57:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-11-07 04:57:09,251 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:57:09,251 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-11-07 04:57:09,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-11-07 04:57:09,251 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:57:09,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:57:09,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2138313468, now seen corresponding path program 55 times [2020-11-07 04:57:09,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:57:09,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527453417] [2020-11-07 04:57:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:57:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:09,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:57:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:09,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:57:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:09,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:09,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:09,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:09,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:10,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:10,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 04:57:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:10,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:10,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:11,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:11,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:11,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:11,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:12,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:12,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:12,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 61 proven. 584 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-11-07 04:57:13,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527453417] [2020-11-07 04:57:13,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:57:13,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-11-07 04:57:13,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712226845] [2020-11-07 04:57:13,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 04:57:13,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:57:13,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 04:57:13,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 04:57:13,230 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 43 states. [2020-11-07 04:57:15,340 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:57:15,739 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:57:16,031 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:57:16,471 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:57:16,966 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:57:17,324 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:17,820 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:18,226 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:57:18,542 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:18,986 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:19,370 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:57:19,672 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:20,117 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:20,498 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:57:20,794 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:57:26,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:57:26,763 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-11-07 04:57:26,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 04:57:26,766 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 185 [2020-11-07 04:57:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:57:26,768 INFO L225 Difference]: With dead ends: 114 [2020-11-07 04:57:26,768 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 04:57:26,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=599, Invalid=6043, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 04:57:26,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 04:57:26,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-11-07 04:57:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 04:57:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-11-07 04:57:26,842 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 185 [2020-11-07 04:57:26,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:57:26,842 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-11-07 04:57:26,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 04:57:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-11-07 04:57:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-07 04:57:26,844 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:57:26,844 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 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] [2020-11-07 04:57:26,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-11-07 04:57:26,844 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:57:26,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:57:26,845 INFO L82 PathProgramCache]: Analyzing trace with hash 470559535, now seen corresponding path program 56 times [2020-11-07 04:57:26,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:57:26,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893620040] [2020-11-07 04:57:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:57:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:27,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:57:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:27,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:57:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:27,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:27,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:27,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:27,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:27,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:28,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:28,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 04:57:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:28,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:28,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:29,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:29,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:29,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:30,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:30,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:30,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:30,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 65 proven. 664 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-11-07 04:57:31,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893620040] [2020-11-07 04:57:31,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:57:31,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-11-07 04:57:31,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375124243] [2020-11-07 04:57:31,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 04:57:31,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:57:31,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 04:57:31,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1866, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 04:57:31,271 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 45 states. [2020-11-07 04:57:33,473 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:57:33,870 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:57:34,185 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:57:34,649 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:57:35,172 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:57:35,558 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:36,074 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:36,466 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:57:36,784 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:37,244 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:37,669 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:57:37,999 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:38,486 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:38,932 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:57:39,262 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:39,743 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:57:40,160 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:57:40,486 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:57:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:57:45,729 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2020-11-07 04:57:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 04:57:45,730 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 195 [2020-11-07 04:57:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:57:45,731 INFO L225 Difference]: With dead ends: 110 [2020-11-07 04:57:45,731 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 04:57:45,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=608, Invalid=6364, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 04:57:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 04:57:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2020-11-07 04:57:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-07 04:57:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2020-11-07 04:57:45,779 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 195 [2020-11-07 04:57:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:57:45,779 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2020-11-07 04:57:45,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 04:57:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2020-11-07 04:57:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-07 04:57:45,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:57:45,781 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-11-07 04:57:45,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-11-07 04:57:45,781 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:57:45,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:57:45,781 INFO L82 PathProgramCache]: Analyzing trace with hash 289242404, now seen corresponding path program 57 times [2020-11-07 04:57:45,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:57:45,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120680462] [2020-11-07 04:57:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:57:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:45,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:57:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:45,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:57:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:46,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:46,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:46,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:46,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:46,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:47,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:47,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:47,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 04:57:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:47,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 15 proven. 221 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-11-07 04:57:48,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120680462] [2020-11-07 04:57:48,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:57:48,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-11-07 04:57:48,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932055954] [2020-11-07 04:57:48,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 04:57:48,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:57:48,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 04:57:48,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-11-07 04:57:48,047 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand 31 states. [2020-11-07 04:57:49,622 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-11-07 04:57:49,935 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 04:57:50,167 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-07 04:57:56,045 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-11-07 04:57:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:57:56,619 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2020-11-07 04:57:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 04:57:56,622 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-11-07 04:57:56,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:57:56,624 INFO L225 Difference]: With dead ends: 110 [2020-11-07 04:57:56,624 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 04:57:56,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=469, Invalid=3563, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 04:57:56,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 04:57:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 04:57:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 04:57:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2020-11-07 04:57:56,657 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 125 [2020-11-07 04:57:56,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:57:56,657 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2020-11-07 04:57:56,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 04:57:56,657 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2020-11-07 04:57:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-11-07 04:57:56,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:57:56,658 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-11-07 04:57:56,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-11-07 04:57:56,659 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:57:56,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:57:56,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2070355772, now seen corresponding path program 58 times [2020-11-07 04:57:56,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:57:56,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759751617] [2020-11-07 04:57:56,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:57:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:56,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:57:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:56,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:57:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:57,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:57,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:57,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:57,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:57,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:57,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:58,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:58,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 04:57:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:58,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:58,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:58,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:58,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:58,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:58,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:58,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:57:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:57:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 57 proven. 551 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-11-07 04:57:58,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759751617] [2020-11-07 04:57:58,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:57:58,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-11-07 04:57:58,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690763723] [2020-11-07 04:57:58,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 04:57:58,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:57:58,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 04:57:58,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2020-11-07 04:57:58,736 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand 28 states. [2020-11-07 04:58:07,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:58:07,132 INFO L93 Difference]: Finished difference Result 110 states and 139 transitions. [2020-11-07 04:58:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 04:58:07,136 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 185 [2020-11-07 04:58:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:58:07,137 INFO L225 Difference]: With dead ends: 110 [2020-11-07 04:58:07,138 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 04:58:07,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=455, Invalid=3205, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 04:58:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 04:58:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 04:58:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 04:58:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2020-11-07 04:58:07,180 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 185 [2020-11-07 04:58:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:58:07,180 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2020-11-07 04:58:07,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 04:58:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2020-11-07 04:58:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-07 04:58:07,182 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:58:07,182 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 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] [2020-11-07 04:58:07,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-11-07 04:58:07,182 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:58:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:58:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1197337913, now seen corresponding path program 59 times [2020-11-07 04:58:07,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:58:07,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048668444] [2020-11-07 04:58:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:58:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:07,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:58:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:07,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:58:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:07,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:07,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:07,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:08,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:08,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:08,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:08,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:09,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 04:58:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:09,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:09,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:09,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:10,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:10,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:11,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:11,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:11,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 64 proven. 665 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-11-07 04:58:12,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048668444] [2020-11-07 04:58:12,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:58:12,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-11-07 04:58:12,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784579817] [2020-11-07 04:58:12,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 04:58:12,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:58:12,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 04:58:12,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1866, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 04:58:12,327 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand 45 states. [2020-11-07 04:58:15,358 WARN L194 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:58:15,947 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:58:16,354 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:58:16,986 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:58:17,672 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:58:18,079 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:18,731 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:19,261 WARN L194 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:58:19,675 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:20,347 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:20,970 WARN L194 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:58:21,412 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:22,023 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:22,558 WARN L194 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:58:22,970 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:23,630 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:24,228 WARN L194 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:58:24,697 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:25,353 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:25,916 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:58:26,331 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:58:30,981 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 04:58:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:58:31,300 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2020-11-07 04:58:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 04:58:31,304 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 195 [2020-11-07 04:58:31,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:58:31,306 INFO L225 Difference]: With dead ends: 110 [2020-11-07 04:58:31,306 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 04:58:31,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=570, Invalid=5910, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 04:58:31,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 04:58:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 04:58:31,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 04:58:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2020-11-07 04:58:31,346 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 195 [2020-11-07 04:58:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:58:31,347 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2020-11-07 04:58:31,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 04:58:31,347 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2020-11-07 04:58:31,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 04:58:31,348 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:58:31,348 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-11-07 04:58:31,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-11-07 04:58:31,348 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:58:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:58:31,349 INFO L82 PathProgramCache]: Analyzing trace with hash -377365276, now seen corresponding path program 60 times [2020-11-07 04:58:31,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:58:31,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463800741] [2020-11-07 04:58:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:58:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:31,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:58:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:31,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:58:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:31,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:32,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:32,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:32,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:32,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:32,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:33,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:33,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 04:58:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:33,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:33,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:34,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:34,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:34,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 47 proven. 445 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-11-07 04:58:35,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463800741] [2020-11-07 04:58:35,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:58:35,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-11-07 04:58:35,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708787503] [2020-11-07 04:58:35,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 04:58:35,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:58:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 04:58:35,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 04:58:35,035 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand 39 states. [2020-11-07 04:58:37,236 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:58:37,695 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-11-07 04:58:38,001 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:58:38,448 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:58:38,960 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:58:39,324 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:39,812 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:40,230 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:58:40,560 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:41,018 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:41,449 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:58:41,784 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:42,277 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:42,768 WARN L194 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:58:43,195 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:58:44,202 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 04:58:44,551 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 04:58:48,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:58:48,016 INFO L93 Difference]: Finished difference Result 110 states and 137 transitions. [2020-11-07 04:58:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 04:58:48,022 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-11-07 04:58:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:58:48,023 INFO L225 Difference]: With dead ends: 110 [2020-11-07 04:58:48,023 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 04:58:48,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=505, Invalid=4607, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 04:58:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 04:58:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 04:58:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 04:58:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 125 transitions. [2020-11-07 04:58:48,069 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 125 transitions. Word has length 165 [2020-11-07 04:58:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:58:48,069 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 125 transitions. [2020-11-07 04:58:48,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 04:58:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 125 transitions. [2020-11-07 04:58:48,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 04:58:48,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:58:48,071 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-11-07 04:58:48,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-11-07 04:58:48,071 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:58:48,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:58:48,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1714688260, now seen corresponding path program 61 times [2020-11-07 04:58:48,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:58:48,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218560554] [2020-11-07 04:58:48,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:58:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:48,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:58:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:48,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:58:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:48,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:48,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:49,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:49,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:49,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:49,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:50,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:50,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 04:58:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:51,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:51,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:51,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:58:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:58:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 37 proven. 322 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-11-07 04:58:51,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218560554] [2020-11-07 04:58:51,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:58:51,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-11-07 04:58:51,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799235726] [2020-11-07 04:58:51,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 04:58:51,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:58:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 04:58:51,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 04:58:51,780 INFO L87 Difference]: Start difference. First operand 98 states and 125 transitions. Second operand 35 states. [2020-11-07 04:58:53,880 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:58:54,250 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:58:54,566 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:58:55,033 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:58:55,532 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:58:55,935 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:56,519 WARN L194 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:58:57,016 WARN L194 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:58:57,400 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:58:57,855 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 04:58:58,230 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 04:58:58,535 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 04:58:59,027 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 04:58:59,463 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 04:59:00,622 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 04:59:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:59:04,314 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2020-11-07 04:59:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 04:59:04,314 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 145 [2020-11-07 04:59:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:59:04,316 INFO L225 Difference]: With dead ends: 110 [2020-11-07 04:59:04,316 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 04:59:04,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=487, Invalid=4069, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 04:59:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 04:59:04,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 04:59:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 04:59:04,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2020-11-07 04:59:04,360 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 145 [2020-11-07 04:59:04,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:59:04,361 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2020-11-07 04:59:04,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 04:59:04,361 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2020-11-07 04:59:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-11-07 04:59:04,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:59:04,362 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 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] [2020-11-07 04:59:04,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-11-07 04:59:04,363 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:59:04,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:59:04,363 INFO L82 PathProgramCache]: Analyzing trace with hash -26534748, now seen corresponding path program 62 times [2020-11-07 04:59:04,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:59:04,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627137152] [2020-11-07 04:59:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:59:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:04,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:59:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:04,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:59:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:04,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:04,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:05,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:05,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:05,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:05,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:06,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:06,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 04:59:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:06,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:07,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:07,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:08,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:08,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:08,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:09,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:10,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:10,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 69 proven. 749 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2020-11-07 04:59:11,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627137152] [2020-11-07 04:59:11,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:59:11,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-11-07 04:59:11,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417116159] [2020-11-07 04:59:11,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 04:59:11,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:59:11,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 04:59:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2043, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 04:59:11,203 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand 47 states. [2020-11-07 04:59:15,258 WARN L194 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:59:15,908 WARN L194 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 04:59:16,401 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:59:16,915 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:59:17,669 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 04:59:18,235 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:59:19,027 WARN L194 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:59:19,865 WARN L194 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:59:20,400 WARN L194 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:59:21,064 WARN L194 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:59:21,857 WARN L194 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:59:22,410 WARN L194 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:59:23,214 WARN L194 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:59:24,111 WARN L194 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:59:24,701 WARN L194 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:59:25,506 WARN L194 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:59:26,465 WARN L194 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 04:59:27,094 WARN L194 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:59:27,695 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 04:59:28,362 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 04:59:28,835 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:59:30,131 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 04:59:31,619 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 04:59:32,262 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 04:59:35,006 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 04:59:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:59:36,184 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-11-07 04:59:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 04:59:36,191 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 205 [2020-11-07 04:59:36,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:59:36,193 INFO L225 Difference]: With dead ends: 110 [2020-11-07 04:59:36,193 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 04:59:36,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=617, Invalid=6693, Unknown=0, NotChecked=0, Total=7310 [2020-11-07 04:59:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 04:59:36,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 04:59:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 04:59:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2020-11-07 04:59:36,242 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 205 [2020-11-07 04:59:36,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:59:36,243 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2020-11-07 04:59:36,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 04:59:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2020-11-07 04:59:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-07 04:59:36,244 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:59:36,245 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-11-07 04:59:36,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-11-07 04:59:36,245 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:59:36,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:59:36,245 INFO L82 PathProgramCache]: Analyzing trace with hash -542475175, now seen corresponding path program 63 times [2020-11-07 04:59:36,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:59:36,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572932487] [2020-11-07 04:59:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:59:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:36,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:59:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:36,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:59:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:36,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:37,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:37,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:37,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:37,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:38,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:38,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:39,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 04:59:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:39,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:40,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 32 proven. 268 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-11-07 04:59:40,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572932487] [2020-11-07 04:59:40,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 04:59:40,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-11-07 04:59:40,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130712738] [2020-11-07 04:59:40,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 04:59:40,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:59:40,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 04:59:40,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 04:59:40,412 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand 33 states. [2020-11-07 04:59:42,491 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-11-07 04:59:42,859 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 04:59:43,427 WARN L194 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 04:59:44,065 WARN L194 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 04:59:44,596 WARN L194 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 04:59:45,254 WARN L194 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 04:59:46,061 WARN L194 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 04:59:46,657 WARN L194 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 04:59:47,278 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 04:59:47,869 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 04:59:48,235 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 04:59:48,740 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 04:59:49,342 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 04:59:49,717 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 04:59:50,196 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 04:59:50,641 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 04:59:50,921 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 04:59:51,297 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 04:59:51,753 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 04:59:52,414 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 04:59:52,866 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 04:59:53,149 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 04:59:55,353 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 04:59:55,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:59:55,623 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2020-11-07 04:59:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 04:59:55,630 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-11-07 04:59:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:59:55,631 INFO L225 Difference]: With dead ends: 110 [2020-11-07 04:59:55,631 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 04:59:55,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=478, Invalid=3812, Unknown=0, NotChecked=0, Total=4290 [2020-11-07 04:59:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 04:59:55,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 04:59:55,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 04:59:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2020-11-07 04:59:55,681 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 135 [2020-11-07 04:59:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:59:55,681 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2020-11-07 04:59:55,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 04:59:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2020-11-07 04:59:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 04:59:55,683 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:59:55,683 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-11-07 04:59:55,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-11-07 04:59:55,683 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:59:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:59:55,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1380368281, now seen corresponding path program 64 times [2020-11-07 04:59:55,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:59:55,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929845906] [2020-11-07 04:59:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:59:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:55,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:59:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:55,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 04:59:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:56,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:56,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:56,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:56,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:57,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:57,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:58,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:58,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 04:59:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:58,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:59,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:59:59,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 04:59:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:00,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:00,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:01,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 52 proven. 514 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-11-07 05:00:01,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929845906] [2020-11-07 05:00:01,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:00:01,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-11-07 05:00:01,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091217010] [2020-11-07 05:00:01,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 05:00:01,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:00:01,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 05:00:01,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 05:00:01,675 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand 41 states. [2020-11-07 05:00:04,893 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:00:05,503 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 05:00:06,135 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 05:00:06,615 WARN L194 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 05:00:07,222 WARN L194 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 05:00:08,131 WARN L194 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 05:00:08,731 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:00:09,554 WARN L194 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:00:10,297 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 05:00:10,781 WARN L194 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:00:11,389 WARN L194 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:00:12,172 WARN L194 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 05:00:12,659 WARN L194 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:00:13,284 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:00:14,053 WARN L194 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 05:00:14,550 WARN L194 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:00:15,173 WARN L194 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:00:15,934 WARN L194 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 05:00:16,418 WARN L194 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 05:00:16,919 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 05:00:17,595 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 05:00:17,964 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:00:20,844 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:00:21,420 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 05:00:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:00:22,291 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2020-11-07 05:00:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 05:00:22,298 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-11-07 05:00:22,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:00:22,300 INFO L225 Difference]: With dead ends: 110 [2020-11-07 05:00:22,300 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 05:00:22,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=514, Invalid=4888, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 05:00:22,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 05:00:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-11-07 05:00:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 05:00:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2020-11-07 05:00:22,349 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 175 [2020-11-07 05:00:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:00:22,350 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2020-11-07 05:00:22,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 05:00:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2020-11-07 05:00:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 05:00:22,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:00:22,351 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-11-07 05:00:22,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-11-07 05:00:22,351 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:00:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:00:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1905288711, now seen corresponding path program 65 times [2020-11-07 05:00:22,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:00:22,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507963129] [2020-11-07 05:00:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:00:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:22,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:00:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:22,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 05:00:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:23,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:23,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:23,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:23,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:24,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:24,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:25,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:25,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 05:00:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:26,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:26,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:26,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:27,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 42 proven. 381 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-11-07 05:00:27,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507963129] [2020-11-07 05:00:27,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:00:27,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-11-07 05:00:27,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707480606] [2020-11-07 05:00:27,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 05:00:27,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:00:27,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 05:00:27,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 05:00:27,707 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 37 states. [2020-11-07 05:00:30,189 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-11-07 05:00:30,630 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:00:31,286 WARN L194 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 05:00:31,904 WARN L194 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 05:00:32,366 WARN L194 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 05:00:32,982 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 05:00:33,840 WARN L194 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 05:00:34,407 WARN L194 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:00:35,141 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:00:35,868 WARN L194 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 05:00:36,342 WARN L194 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:00:36,958 WARN L194 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:00:37,740 WARN L194 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 05:00:38,259 WARN L194 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 05:00:38,803 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 05:00:39,473 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 05:00:39,905 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:00:40,381 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:00:40,958 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:00:41,304 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:00:41,802 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:00:42,405 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:00:42,781 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:00:43,665 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-07 05:00:45,882 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:00:46,332 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 05:00:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:00:46,701 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2020-11-07 05:00:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 05:00:46,708 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 05:00:46,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:00:46,709 INFO L225 Difference]: With dead ends: 110 [2020-11-07 05:00:46,709 INFO L226 Difference]: Without dead ends: 103 [2020-11-07 05:00:46,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=496, Invalid=4334, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 05:00:46,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-07 05:00:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2020-11-07 05:00:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-07 05:00:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2020-11-07 05:00:46,764 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 155 [2020-11-07 05:00:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:00:46,764 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2020-11-07 05:00:46,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 05:00:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2020-11-07 05:00:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-07 05:00:46,765 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:00:46,766 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-11-07 05:00:46,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-11-07 05:00:46,766 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:00:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:00:46,766 INFO L82 PathProgramCache]: Analyzing trace with hash -558382087, now seen corresponding path program 66 times [2020-11-07 05:00:46,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:00:46,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592047336] [2020-11-07 05:00:46,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:00:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:47,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:00:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:47,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 05:00:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:47,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:47,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 05:00:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:47,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:48,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:48,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:48,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:49,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:49,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:49,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:50,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:50,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:52,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:00:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:00:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 52 proven. 355 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-11-07 05:00:52,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592047336] [2020-11-07 05:00:52,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:00:52,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-11-07 05:00:52,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558319437] [2020-11-07 05:00:52,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 05:00:52,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:00:52,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 05:00:52,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 05:00:52,471 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand 37 states. [2020-11-07 05:00:54,655 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-11-07 05:00:55,084 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-11-07 05:00:55,465 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-11-07 05:00:56,052 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-11-07 05:00:56,822 WARN L194 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-11-07 05:00:57,462 WARN L194 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 05:00:57,930 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-07 05:00:58,404 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-11-07 05:00:59,285 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 05:00:59,563 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-11-07 05:00:59,924 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:01:00,796 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-07 05:01:01,483 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 05:01:01,871 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:01:02,406 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-07 05:01:03,064 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 05:01:03,478 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:01:04,024 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-07 05:01:04,812 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 05:01:05,294 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:01:05,873 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-07 05:01:06,484 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 05:01:06,838 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:01:07,320 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-07 05:01:07,946 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 05:01:08,318 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:01:08,814 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-07 05:01:09,430 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 05:01:09,796 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:01:10,305 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-07 05:01:10,976 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 05:01:11,367 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:01:11,932 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-07 05:01:12,606 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 05:01:13,054 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:01:15,480 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-11-07 05:01:16,026 WARN L194 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 05:01:16,445 WARN L194 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-11-07 05:01:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:01:17,290 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2020-11-07 05:01:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 05:01:17,298 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-11-07 05:01:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:01:17,299 INFO L225 Difference]: With dead ends: 115 [2020-11-07 05:01:17,299 INFO L226 Difference]: Without dead ends: 108 [2020-11-07 05:01:17,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=610, Invalid=5552, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 05:01:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-07 05:01:17,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2020-11-07 05:01:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 05:01:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-11-07 05:01:17,342 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 155 [2020-11-07 05:01:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:01:17,343 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-11-07 05:01:17,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 05:01:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-11-07 05:01:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 05:01:17,344 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:01:17,344 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-11-07 05:01:17,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-11-07 05:01:17,344 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:01:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:01:17,344 INFO L82 PathProgramCache]: Analyzing trace with hash -789275676, now seen corresponding path program 67 times [2020-11-07 05:01:17,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:01:17,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833525085] [2020-11-07 05:01:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:01:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:17,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:01:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:17,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 05:01:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:17,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:18,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:18,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 05:01:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:19,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:19,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:19,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:20,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:21,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:21,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:22,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:22,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:23,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:23,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 54 proven. 438 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-11-07 05:01:24,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833525085] [2020-11-07 05:01:24,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:01:24,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-11-07 05:01:24,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993974225] [2020-11-07 05:01:24,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 05:01:24,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:01:24,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 05:01:24,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 05:01:24,430 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 39 states. [2020-11-07 05:01:27,489 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-11-07 05:01:28,035 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:01:28,757 WARN L194 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 05:01:29,515 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 05:01:30,096 WARN L194 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 05:01:30,894 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 05:01:32,158 WARN L194 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 05:01:33,048 WARN L194 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 05:01:34,057 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 05:01:34,473 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-11-07 05:01:35,190 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 05:01:35,504 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-07 05:01:35,890 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:36,831 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:37,534 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:01:37,942 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:38,501 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:39,227 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:01:39,654 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:40,233 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:41,043 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:01:41,516 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:42,239 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:43,173 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:01:43,686 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:44,317 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:44,989 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:01:45,370 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:45,919 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:46,587 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:01:46,965 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:47,496 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:48,157 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:01:48,538 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:01:51,803 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-11-07 05:01:52,396 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 05:01:52,708 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 05:01:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:01:53,309 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-11-07 05:01:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 05:01:53,317 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 165 [2020-11-07 05:01:53,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:01:53,318 INFO L225 Difference]: With dead ends: 119 [2020-11-07 05:01:53,318 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 05:01:53,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=619, Invalid=5861, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 05:01:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 05:01:53,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-11-07 05:01:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 05:01:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-11-07 05:01:53,369 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 165 [2020-11-07 05:01:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:01:53,369 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-11-07 05:01:53,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 05:01:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-11-07 05:01:53,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 05:01:53,370 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:01:53,370 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-11-07 05:01:53,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-11-07 05:01:53,370 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:01:53,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:01:53,371 INFO L82 PathProgramCache]: Analyzing trace with hash -838607975, now seen corresponding path program 68 times [2020-11-07 05:01:53,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:01:53,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250372205] [2020-11-07 05:01:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:01:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:53,880 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-07 05:01:53,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:01:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:53,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 05:01:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:54,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:54,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:54,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:55,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-11-07 05:01:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:55,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:55,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:56,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:56,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:57,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:57,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:58,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:58,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:59,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:01:59,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:01:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 58 proven. 508 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-11-07 05:02:00,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250372205] [2020-11-07 05:02:00,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:02:00,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-11-07 05:02:00,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391808281] [2020-11-07 05:02:00,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 05:02:00,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:02:00,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 05:02:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 05:02:00,037 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 41 states. [2020-11-07 05:02:02,846 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 05:02:03,341 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 05:02:03,722 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 05:02:04,497 WARN L194 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 05:02:05,424 WARN L194 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 05:02:05,958 WARN L194 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:02:06,687 WARN L194 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:02:07,283 WARN L194 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 05:02:07,746 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 05:02:09,200 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 05:02:11,886 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:02:13,163 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:02:13,514 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:02:14,086 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:02:14,556 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:02:15,697 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:02:19,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:02:19,921 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-11-07 05:02:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 05:02:19,926 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 175 [2020-11-07 05:02:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:02:19,928 INFO L225 Difference]: With dead ends: 119 [2020-11-07 05:02:19,928 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 05:02:19,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=628, Invalid=6178, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 05:02:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 05:02:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-11-07 05:02:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 05:02:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-11-07 05:02:19,977 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 175 [2020-11-07 05:02:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:02:19,978 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-11-07 05:02:19,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 05:02:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-11-07 05:02:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-11-07 05:02:19,979 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:02:19,979 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-11-07 05:02:19,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-11-07 05:02:19,979 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:02:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:02:19,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1140911676, now seen corresponding path program 69 times [2020-11-07 05:02:19,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:02:19,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176694574] [2020-11-07 05:02:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:02:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:20,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:02:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:20,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 05:02:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:20,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:20,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:20,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:21,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:21,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 05:02:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:21,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:22,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:22,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:22,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:23,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:23,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:24,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:24,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:25,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:25,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 62 proven. 583 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-11-07 05:02:25,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176694574] [2020-11-07 05:02:25,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:02:25,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-11-07 05:02:25,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357936172] [2020-11-07 05:02:25,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 05:02:25,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:02:25,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 05:02:25,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 05:02:25,958 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 43 states. [2020-11-07 05:02:29,050 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 05:02:29,536 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 05:02:29,914 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 05:02:30,403 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 05:02:31,020 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 05:02:31,469 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:02:32,056 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:02:32,615 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 05:02:33,004 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:02:33,521 WARN L194 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:02:34,108 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 05:02:34,534 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 05:02:35,617 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 05:02:37,258 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:02:38,458 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:02:39,677 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:02:40,936 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:02:41,299 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:02:42,314 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:02:43,640 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 05:02:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:02:44,948 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-11-07 05:02:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 05:02:44,954 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 185 [2020-11-07 05:02:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:02:44,956 INFO L225 Difference]: With dead ends: 119 [2020-11-07 05:02:44,956 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 05:02:44,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=637, Invalid=6503, Unknown=0, NotChecked=0, Total=7140 [2020-11-07 05:02:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 05:02:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-11-07 05:02:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 05:02:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-11-07 05:02:44,999 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 185 [2020-11-07 05:02:45,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:02:45,000 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-11-07 05:02:45,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 05:02:45,000 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-11-07 05:02:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-11-07 05:02:45,001 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:02:45,002 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 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] [2020-11-07 05:02:45,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-11-07 05:02:45,002 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:02:45,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:02:45,002 INFO L82 PathProgramCache]: Analyzing trace with hash 763558713, now seen corresponding path program 70 times [2020-11-07 05:02:45,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:02:45,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733996252] [2020-11-07 05:02:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:02:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:45,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:02:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:45,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 05:02:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:45,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:45,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:45,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:46,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:46,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:47,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 05:02:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:47,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:47,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:48,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:48,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:49,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:49,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:50,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:50,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:51,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:51,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:02:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:02:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 66 proven. 663 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-11-07 05:02:51,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733996252] [2020-11-07 05:02:51,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:02:51,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-11-07 05:02:51,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581245071] [2020-11-07 05:02:51,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 05:02:51,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:02:51,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 05:02:51,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1866, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 05:02:51,901 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 45 states. [2020-11-07 05:02:54,910 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 05:02:55,477 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 05:02:55,899 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 05:02:56,541 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-11-07 05:02:57,280 WARN L194 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-07 05:02:57,786 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 05:02:58,494 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:02:59,056 WARN L194 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 05:02:59,477 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:03:00,112 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:03:00,670 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 05:03:01,086 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:03:01,730 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:03:02,312 WARN L194 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 05:03:02,739 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 05:03:03,469 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 05:03:04,327 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 05:03:04,974 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:06,181 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:03:06,606 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:07,312 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:07,894 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:03:08,245 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:08,865 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:09,453 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:03:09,850 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:10,529 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:11,099 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:03:11,493 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:12,951 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 05:03:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:03:14,767 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-11-07 05:03:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 05:03:14,775 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 195 [2020-11-07 05:03:14,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:03:14,777 INFO L225 Difference]: With dead ends: 119 [2020-11-07 05:03:14,777 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 05:03:14,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=646, Invalid=6836, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 05:03:14,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 05:03:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-11-07 05:03:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 05:03:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-11-07 05:03:14,820 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 195 [2020-11-07 05:03:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:03:14,820 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-11-07 05:03:14,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 05:03:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-11-07 05:03:14,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-11-07 05:03:14,821 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:03:14,822 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 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] [2020-11-07 05:03:14,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-11-07 05:03:14,822 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:03:14,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:03:14,822 INFO L82 PathProgramCache]: Analyzing trace with hash -826818652, now seen corresponding path program 71 times [2020-11-07 05:03:14,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:03:14,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671984716] [2020-11-07 05:03:14,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:03:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:15,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:03:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:15,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 05:03:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:15,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:15,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:15,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:16,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:16,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:17,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:17,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 05:03:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:17,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:18,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:18,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:18,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:19,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:19,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:20,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:20,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:20,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:21,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 70 proven. 748 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2020-11-07 05:03:21,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671984716] [2020-11-07 05:03:21,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:03:21,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-11-07 05:03:21,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556150716] [2020-11-07 05:03:21,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 05:03:21,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:03:21,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 05:03:21,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2043, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 05:03:21,924 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 47 states. [2020-11-07 05:03:25,390 WARN L194 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 05:03:25,981 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 05:03:26,421 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 05:03:27,077 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 05:03:27,815 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 05:03:28,332 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:03:29,051 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:03:29,612 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 05:03:30,050 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:03:30,705 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:03:31,288 WARN L194 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 05:03:31,770 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:03:32,545 WARN L194 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:03:33,259 WARN L194 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 05:03:33,790 WARN L194 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:03:34,544 WARN L194 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:03:35,249 WARN L194 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-07 05:03:35,790 WARN L194 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 05:03:36,635 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 05:03:37,525 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 05:03:38,137 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:38,881 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:39,466 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:03:39,879 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:40,578 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:41,173 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:03:41,579 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:42,265 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:42,823 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-11-07 05:03:43,226 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-07 05:03:46,348 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 05:03:46,643 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 05:03:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:03:46,882 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-11-07 05:03:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 05:03:46,890 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 205 [2020-11-07 05:03:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:03:46,892 INFO L225 Difference]: With dead ends: 119 [2020-11-07 05:03:46,892 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 05:03:46,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=655, Invalid=7177, Unknown=0, NotChecked=0, Total=7832 [2020-11-07 05:03:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 05:03:46,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-11-07 05:03:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 05:03:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-11-07 05:03:46,963 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 205 [2020-11-07 05:03:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:03:46,963 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-11-07 05:03:46,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 05:03:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-11-07 05:03:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-11-07 05:03:46,964 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:03:46,965 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 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] [2020-11-07 05:03:46,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-11-07 05:03:46,965 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:03:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:03:46,965 INFO L82 PathProgramCache]: Analyzing trace with hash 744694489, now seen corresponding path program 72 times [2020-11-07 05:03:46,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:03:46,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513718310] [2020-11-07 05:03:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:03:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:47,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:03:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:47,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 05:03:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:47,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:47,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:48,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:48,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:48,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:48,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:49,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:49,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 05:03:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:49,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:50,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:50,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:51,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:51,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:51,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:52,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:52,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:53,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:53,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 05:03:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:03:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 74 proven. 838 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-11-07 05:03:54,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513718310] [2020-11-07 05:03:54,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:03:54,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-11-07 05:03:54,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143496541] [2020-11-07 05:03:54,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-07 05:03:54,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:03:54,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-07 05:03:54,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2228, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 05:03:54,438 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 49 states. [2020-11-07 05:03:58,175 WARN L194 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-07 05:03:58,827 WARN L194 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-11-07 05:03:59,319 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-07 05:03:59,973 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 05:04:00,804 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-07 05:04:01,386 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:04:02,163 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:04:02,877 WARN L194 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 05:04:03,342 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:04:03,959 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:04:04,691 WARN L194 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-11-07 05:04:05,168 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-07 05:04:05,780 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54