/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/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:35:46,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:35:46,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:35:46,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:35:46,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:35:46,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:35:46,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:35:46,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:35:46,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:35:46,581 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:35:46,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:35:46,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:35:46,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:35:46,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:35:46,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:35:46,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:35:46,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:35:46,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:35:46,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:35:46,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:35:46,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:35:46,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:35:46,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:35:46,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:35:46,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:35:46,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:35:46,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:35:46,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:35:46,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:35:46,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:35:46,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:35:46,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:35:46,677 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:35:46,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:35:46,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:35:46,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:35:46,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:35:46,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:35:46,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:35:46,679 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:35:46,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:35:46,680 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:35:46,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:35:46,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:35:46,680 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:35:46,681 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:35:46,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:35:46,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:46,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:35:46,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:35:46,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:35:46,682 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:35:47,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:35:47,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:35:47,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:35:47,091 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:35:47,091 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:35:47,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-11-07 06:35:47,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5780bb80/d83b70d8073440e3a1d3208c53062880/FLAG05f851d1c [2020-11-07 06:35:47,740 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:35:47,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-11-07 06:35:47,747 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5780bb80/d83b70d8073440e3a1d3208c53062880/FLAG05f851d1c [2020-11-07 06:35:48,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5780bb80/d83b70d8073440e3a1d3208c53062880 [2020-11-07 06:35:48,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:35:48,129 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:35:48,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:48,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:35:48,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:35:48,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1f0c14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48, skipping insertion in model container [2020-11-07 06:35:48,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:35:48,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:35:48,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:48,402 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:35:48,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:48,441 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:35:48,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48 WrapperNode [2020-11-07 06:35:48,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:48,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:35:48,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:35:48,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:35:48,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... [2020-11-07 06:35:48,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:35:48,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:35:48,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:35:48,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:35:48,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:48,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:35:48,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:35:48,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:35:48,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:35:48,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:35:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:35:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:35:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:35:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:35:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:35:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:35:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:35:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:35:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:35:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:35:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:35:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:35:48,815 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:35:48,815 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:35:48,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:48 BoogieIcfgContainer [2020-11-07 06:35:48,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:35:48,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:35:48,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:35:48,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:35:48,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:35:48" (1/3) ... [2020-11-07 06:35:48,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f41c723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:48, skipping insertion in model container [2020-11-07 06:35:48,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:48" (2/3) ... [2020-11-07 06:35:48,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f41c723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:48, skipping insertion in model container [2020-11-07 06:35:48,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:48" (3/3) ... [2020-11-07 06:35:48,838 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-11-07 06:35:48,865 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:35:48,868 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:35:48,901 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:35:48,929 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:35:48,929 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:35:48,929 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:35:48,929 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:35:48,929 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:35:48,929 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:35:48,930 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:35:48,930 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:35:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-11-07 06:35:48,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-07 06:35:48,954 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:48,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:48,955 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:48,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:48,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1359326843, now seen corresponding path program 1 times [2020-11-07 06:35:48,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:48,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256229001] [2020-11-07 06:35:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:49,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:49,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256229001] [2020-11-07 06:35:49,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:49,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:35:49,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210043449] [2020-11-07 06:35:49,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:35:49,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:49,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:35:49,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:35:49,382 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-11-07 06:35:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:49,487 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-11-07 06:35:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:35:49,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-11-07 06:35:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:49,497 INFO L225 Difference]: With dead ends: 55 [2020-11-07 06:35:49,497 INFO L226 Difference]: Without dead ends: 27 [2020-11-07 06:35:49,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:35:49,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-07 06:35:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-07 06:35:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-07 06:35:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-07 06:35:49,546 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2020-11-07 06:35:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:49,546 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-07 06:35:49,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:35:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-07 06:35:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-07 06:35:49,548 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:49,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:49,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:35:49,549 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:49,550 INFO L82 PathProgramCache]: Analyzing trace with hash -756925380, now seen corresponding path program 1 times [2020-11-07 06:35:49,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:49,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885636276] [2020-11-07 06:35:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:49,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:49,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885636276] [2020-11-07 06:35:49,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:49,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 06:35:49,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441679670] [2020-11-07 06:35:49,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 06:35:49,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:49,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 06:35:49,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 06:35:49,658 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 4 states. [2020-11-07 06:35:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:49,734 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-11-07 06:35:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 06:35:49,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-07 06:35:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:49,736 INFO L225 Difference]: With dead ends: 38 [2020-11-07 06:35:49,736 INFO L226 Difference]: Without dead ends: 31 [2020-11-07 06:35:49,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 06:35:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-07 06:35:49,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-11-07 06:35:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-07 06:35:49,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-11-07 06:35:49,748 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-11-07 06:35:49,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:49,748 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-11-07 06:35:49,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 06:35:49,748 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-11-07 06:35:49,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-07 06:35:49,749 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:49,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:49,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:35:49,750 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:49,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:49,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1456501324, now seen corresponding path program 1 times [2020-11-07 06:35:49,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:49,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425324020] [2020-11-07 06:35:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:49,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:49,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425324020] [2020-11-07 06:35:49,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:49,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:35:49,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781256899] [2020-11-07 06:35:49,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:49,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:49,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:49,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:49,869 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 6 states. [2020-11-07 06:35:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:50,045 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-11-07 06:35:50,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:35:50,049 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-11-07 06:35:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:50,051 INFO L225 Difference]: With dead ends: 43 [2020-11-07 06:35:50,051 INFO L226 Difference]: Without dead ends: 36 [2020-11-07 06:35:50,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-07 06:35:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-11-07 06:35:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-07 06:35:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-11-07 06:35:50,072 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-11-07 06:35:50,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:50,073 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-11-07 06:35:50,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-11-07 06:35:50,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 06:35:50,079 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:50,079 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:50,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:35:50,080 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:50,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1068341444, now seen corresponding path program 2 times [2020-11-07 06:35:50,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:50,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220288247] [2020-11-07 06:35:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:50,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220288247] [2020-11-07 06:35:50,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:50,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:35:50,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835824061] [2020-11-07 06:35:50,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:35:50,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:50,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:35:50,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:50,288 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 8 states. [2020-11-07 06:35:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:50,448 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-11-07 06:35:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 06:35:50,449 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-11-07 06:35:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:50,450 INFO L225 Difference]: With dead ends: 48 [2020-11-07 06:35:50,450 INFO L226 Difference]: Without dead ends: 41 [2020-11-07 06:35:50,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:50,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-07 06:35:50,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-11-07 06:35:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-07 06:35:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-11-07 06:35:50,461 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-11-07 06:35:50,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:50,461 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-11-07 06:35:50,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:35:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-11-07 06:35:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 06:35:50,463 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:50,463 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:50,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:35:50,464 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:50,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:50,464 INFO L82 PathProgramCache]: Analyzing trace with hash 35799732, now seen corresponding path program 3 times [2020-11-07 06:35:50,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:50,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737915373] [2020-11-07 06:35:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:50,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737915373] [2020-11-07 06:35:50,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:50,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:35:50,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780944960] [2020-11-07 06:35:50,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:35:50,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:50,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:35:50,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:50,595 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 10 states. [2020-11-07 06:35:50,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:50,768 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-11-07 06:35:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:50,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-11-07 06:35:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:50,770 INFO L225 Difference]: With dead ends: 53 [2020-11-07 06:35:50,770 INFO L226 Difference]: Without dead ends: 46 [2020-11-07 06:35:50,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:35:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-07 06:35:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-11-07 06:35:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-07 06:35:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-11-07 06:35:50,786 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-11-07 06:35:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:50,786 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-11-07 06:35:50,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:35:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-11-07 06:35:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 06:35:50,789 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:50,790 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:50,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:35:50,791 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:50,791 INFO L82 PathProgramCache]: Analyzing trace with hash 197710396, now seen corresponding path program 4 times [2020-11-07 06:35:50,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:50,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087332446] [2020-11-07 06:35:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:50,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087332446] [2020-11-07 06:35:50,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:50,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:50,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537649795] [2020-11-07 06:35:50,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:50,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:50,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:50,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:50,986 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 12 states. [2020-11-07 06:35:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:51,187 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-11-07 06:35:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:35:51,188 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-11-07 06:35:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:51,189 INFO L225 Difference]: With dead ends: 58 [2020-11-07 06:35:51,189 INFO L226 Difference]: Without dead ends: 51 [2020-11-07 06:35:51,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-07 06:35:51,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-11-07 06:35:51,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-07 06:35:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-11-07 06:35:51,198 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-11-07 06:35:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:51,198 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-11-07 06:35:51,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-11-07 06:35:51,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 06:35:51,200 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:51,200 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:51,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:35:51,200 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:51,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:51,201 INFO L82 PathProgramCache]: Analyzing trace with hash 116832180, now seen corresponding path program 5 times [2020-11-07 06:35:51,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:51,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219397831] [2020-11-07 06:35:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:51,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219397831] [2020-11-07 06:35:51,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:51,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:35:51,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489130046] [2020-11-07 06:35:51,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:35:51,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:51,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:35:51,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:35:51,399 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 14 states. [2020-11-07 06:35:51,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:51,690 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-11-07 06:35:51,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:35:51,690 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-11-07 06:35:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:51,691 INFO L225 Difference]: With dead ends: 63 [2020-11-07 06:35:51,692 INFO L226 Difference]: Without dead ends: 56 [2020-11-07 06:35:51,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-11-07 06:35:51,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-07 06:35:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-11-07 06:35:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-07 06:35:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-11-07 06:35:51,701 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2020-11-07 06:35:51,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:51,701 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-11-07 06:35:51,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:35:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-11-07 06:35:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 06:35:51,703 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:51,703 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:51,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:35:51,703 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:51,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:51,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1837793988, now seen corresponding path program 6 times [2020-11-07 06:35:51,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:51,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476933604] [2020-11-07 06:35:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:51,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476933604] [2020-11-07 06:35:51,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:51,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:35:51,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381745055] [2020-11-07 06:35:51,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:35:51,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:51,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:35:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:35:51,904 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 16 states. [2020-11-07 06:35:52,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:52,224 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-11-07 06:35:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:35:52,226 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-11-07 06:35:52,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:52,228 INFO L225 Difference]: With dead ends: 68 [2020-11-07 06:35:52,228 INFO L226 Difference]: Without dead ends: 61 [2020-11-07 06:35:52,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-11-07 06:35:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-07 06:35:52,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-11-07 06:35:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-07 06:35:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-11-07 06:35:52,244 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2020-11-07 06:35:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:52,246 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-11-07 06:35:52,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:35:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-11-07 06:35:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-07 06:35:52,248 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:52,248 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:52,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:35:52,248 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1736643404, now seen corresponding path program 7 times [2020-11-07 06:35:52,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:52,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74242941] [2020-11-07 06:35:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:52,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:52,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74242941] [2020-11-07 06:35:52,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:52,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:35:52,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343134639] [2020-11-07 06:35:52,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:35:52,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:52,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:35:52,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:35:52,515 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 18 states. [2020-11-07 06:35:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:52,947 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-11-07 06:35:52,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:35:52,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-11-07 06:35:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:52,949 INFO L225 Difference]: With dead ends: 73 [2020-11-07 06:35:52,949 INFO L226 Difference]: Without dead ends: 66 [2020-11-07 06:35:52,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-11-07 06:35:52,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-07 06:35:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-11-07 06:35:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 06:35:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-11-07 06:35:52,959 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2020-11-07 06:35:52,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:52,959 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-11-07 06:35:52,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:35:52,960 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-11-07 06:35:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-07 06:35:52,961 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:52,961 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:52,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:35:52,961 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:52,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1971873852, now seen corresponding path program 8 times [2020-11-07 06:35:52,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:52,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358922957] [2020-11-07 06:35:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:53,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:53,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358922957] [2020-11-07 06:35:53,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:53,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 06:35:53,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322549736] [2020-11-07 06:35:53,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 06:35:53,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:53,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 06:35:53,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:53,308 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 20 states. [2020-11-07 06:35:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:53,839 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-11-07 06:35:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 06:35:53,840 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-11-07 06:35:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:53,841 INFO L225 Difference]: With dead ends: 78 [2020-11-07 06:35:53,841 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 06:35:53,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 06:35:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 06:35:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-11-07 06:35:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-07 06:35:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-11-07 06:35:53,858 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 62 [2020-11-07 06:35:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:53,858 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-11-07 06:35:53,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 06:35:53,859 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-11-07 06:35:53,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 06:35:53,861 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:53,862 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:53,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:35:53,862 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:53,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:53,863 INFO L82 PathProgramCache]: Analyzing trace with hash -746266188, now seen corresponding path program 9 times [2020-11-07 06:35:53,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:53,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813788815] [2020-11-07 06:35:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:54,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:54,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813788815] [2020-11-07 06:35:54,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:54,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-11-07 06:35:54,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461392483] [2020-11-07 06:35:54,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 06:35:54,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:54,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 06:35:54,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-07 06:35:54,278 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 22 states. [2020-11-07 06:35:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:54,754 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-11-07 06:35:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-07 06:35:54,755 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-11-07 06:35:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:54,756 INFO L225 Difference]: With dead ends: 83 [2020-11-07 06:35:54,756 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 06:35:54,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:35:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 06:35:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-11-07 06:35:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 06:35:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-11-07 06:35:54,782 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 67 [2020-11-07 06:35:54,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:54,783 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-11-07 06:35:54,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 06:35:54,783 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-11-07 06:35:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-07 06:35:54,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:54,784 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:54,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 06:35:54,785 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash 439456572, now seen corresponding path program 10 times [2020-11-07 06:35:54,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:54,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803552146] [2020-11-07 06:35:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:55,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:55,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803552146] [2020-11-07 06:35:55,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:55,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-11-07 06:35:55,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080905073] [2020-11-07 06:35:55,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 06:35:55,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:55,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 06:35:55,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-11-07 06:35:55,179 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 24 states. [2020-11-07 06:35:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:55,708 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-11-07 06:35:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 06:35:55,709 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 72 [2020-11-07 06:35:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:55,710 INFO L225 Difference]: With dead ends: 88 [2020-11-07 06:35:55,710 INFO L226 Difference]: Without dead ends: 81 [2020-11-07 06:35:55,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 06:35:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-07 06:35:55,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-11-07 06:35:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 06:35:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-11-07 06:35:55,725 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 72 [2020-11-07 06:35:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:55,727 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-11-07 06:35:55,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 06:35:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-11-07 06:35:55,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-07 06:35:55,732 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:55,732 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:55,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 06:35:55,732 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash 283023028, now seen corresponding path program 11 times [2020-11-07 06:35:55,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:55,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196259039] [2020-11-07 06:35:55,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:56,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:56,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196259039] [2020-11-07 06:35:56,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:56,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-11-07 06:35:56,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875256200] [2020-11-07 06:35:56,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 06:35:56,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:56,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 06:35:56,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-11-07 06:35:56,185 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 26 states. [2020-11-07 06:35:56,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:56,921 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-11-07 06:35:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 06:35:56,934 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 77 [2020-11-07 06:35:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:56,935 INFO L225 Difference]: With dead ends: 93 [2020-11-07 06:35:56,935 INFO L226 Difference]: Without dead ends: 86 [2020-11-07 06:35:56,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 06:35:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-07 06:35:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-11-07 06:35:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 06:35:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-11-07 06:35:56,946 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 77 [2020-11-07 06:35:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:56,946 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-11-07 06:35:56,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 06:35:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-11-07 06:35:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-07 06:35:56,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:56,947 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:56,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 06:35:56,948 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:56,948 INFO L82 PathProgramCache]: Analyzing trace with hash 698416700, now seen corresponding path program 12 times [2020-11-07 06:35:56,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:56,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861068665] [2020-11-07 06:35:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:57,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:57,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861068665] [2020-11-07 06:35:57,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:57,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-11-07 06:35:57,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770424487] [2020-11-07 06:35:57,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 06:35:57,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:57,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 06:35:57,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-11-07 06:35:57,404 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 28 states. [2020-11-07 06:35:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:58,228 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-11-07 06:35:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-07 06:35:58,229 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2020-11-07 06:35:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:58,230 INFO L225 Difference]: With dead ends: 98 [2020-11-07 06:35:58,230 INFO L226 Difference]: Without dead ends: 91 [2020-11-07 06:35:58,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 06:35:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-07 06:35:58,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-11-07 06:35:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 06:35:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-11-07 06:35:58,254 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 82 [2020-11-07 06:35:58,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:58,254 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-11-07 06:35:58,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 06:35:58,254 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-11-07 06:35:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-07 06:35:58,257 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:58,258 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:58,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 06:35:58,258 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:58,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:58,259 INFO L82 PathProgramCache]: Analyzing trace with hash -447083596, now seen corresponding path program 13 times [2020-11-07 06:35:58,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:58,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918809845] [2020-11-07 06:35:58,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:58,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:58,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918809845] [2020-11-07 06:35:58,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:58,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-11-07 06:35:58,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343026523] [2020-11-07 06:35:58,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-07 06:35:58,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:58,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-07 06:35:58,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:35:58,817 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 30 states. [2020-11-07 06:35:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:59,704 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-11-07 06:35:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-07 06:35:59,705 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-11-07 06:35:59,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:59,707 INFO L225 Difference]: With dead ends: 103 [2020-11-07 06:35:59,707 INFO L226 Difference]: Without dead ends: 96 [2020-11-07 06:35:59,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 06:35:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-07 06:35:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-11-07 06:35:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 06:35:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-11-07 06:35:59,717 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 87 [2020-11-07 06:35:59,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:59,718 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-11-07 06:35:59,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-07 06:35:59,718 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-11-07 06:35:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-07 06:35:59,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:59,720 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:59,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 06:35:59,720 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:59,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:59,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1861834436, now seen corresponding path program 14 times [2020-11-07 06:35:59,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:59,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926751515] [2020-11-07 06:35:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:00,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:00,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926751515] [2020-11-07 06:36:00,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:00,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-11-07 06:36:00,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876254136] [2020-11-07 06:36:00,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 06:36:00,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:00,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 06:36:00,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-11-07 06:36:00,305 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 32 states. [2020-11-07 06:36:01,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:01,264 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-11-07 06:36:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-07 06:36:01,266 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2020-11-07 06:36:01,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:01,268 INFO L225 Difference]: With dead ends: 108 [2020-11-07 06:36:01,268 INFO L226 Difference]: Without dead ends: 101 [2020-11-07 06:36:01,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 06:36:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-07 06:36:01,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-11-07 06:36:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-07 06:36:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-11-07 06:36:01,277 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 92 [2020-11-07 06:36:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:01,278 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-11-07 06:36:01,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 06:36:01,278 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-11-07 06:36:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 06:36:01,279 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:01,279 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:01,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 06:36:01,279 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash 566706356, now seen corresponding path program 15 times [2020-11-07 06:36:01,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:01,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636523821] [2020-11-07 06:36:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:02,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:02,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636523821] [2020-11-07 06:36:02,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:02,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-11-07 06:36:02,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791967065] [2020-11-07 06:36:02,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-07 06:36:02,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:02,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-07 06:36:02,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 06:36:02,026 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 34 states. [2020-11-07 06:36:03,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:03,193 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2020-11-07 06:36:03,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-07 06:36:03,194 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2020-11-07 06:36:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:03,195 INFO L225 Difference]: With dead ends: 113 [2020-11-07 06:36:03,195 INFO L226 Difference]: Without dead ends: 106 [2020-11-07 06:36:03,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 06:36:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-07 06:36:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-11-07 06:36:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-07 06:36:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-11-07 06:36:03,204 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 97 [2020-11-07 06:36:03,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:03,205 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-11-07 06:36:03,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-07 06:36:03,205 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-11-07 06:36:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-07 06:36:03,206 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:03,206 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:03,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 06:36:03,206 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:03,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:03,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2121100228, now seen corresponding path program 16 times [2020-11-07 06:36:03,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:03,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163142546] [2020-11-07 06:36:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:03,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:03,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163142546] [2020-11-07 06:36:03,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:03,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-11-07 06:36:03,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945851852] [2020-11-07 06:36:03,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 06:36:03,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:03,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 06:36:03,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 06:36:03,888 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 36 states. [2020-11-07 06:36:05,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:05,028 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-11-07 06:36:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-07 06:36:05,028 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 102 [2020-11-07 06:36:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:05,029 INFO L225 Difference]: With dead ends: 118 [2020-11-07 06:36:05,029 INFO L226 Difference]: Without dead ends: 111 [2020-11-07 06:36:05,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 06:36:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-07 06:36:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-11-07 06:36:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-07 06:36:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-11-07 06:36:05,042 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 102 [2020-11-07 06:36:05,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:05,042 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-11-07 06:36:05,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 06:36:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-11-07 06:36:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-07 06:36:05,044 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:05,044 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:05,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 06:36:05,044 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash -755616332, now seen corresponding path program 17 times [2020-11-07 06:36:05,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:05,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541275463] [2020-11-07 06:36:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:05,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:05,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541275463] [2020-11-07 06:36:05,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:05,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-11-07 06:36:05,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810927240] [2020-11-07 06:36:05,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 06:36:05,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:05,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 06:36:05,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 06:36:05,864 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 38 states. [2020-11-07 06:36:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:07,145 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2020-11-07 06:36:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-07 06:36:07,146 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2020-11-07 06:36:07,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:07,147 INFO L225 Difference]: With dead ends: 123 [2020-11-07 06:36:07,147 INFO L226 Difference]: Without dead ends: 116 [2020-11-07 06:36:07,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 06:36:07,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-07 06:36:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-11-07 06:36:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-07 06:36:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-11-07 06:36:07,158 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 107 [2020-11-07 06:36:07,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:07,158 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-11-07 06:36:07,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 06:36:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-11-07 06:36:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-07 06:36:07,159 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:07,160 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:07,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 06:36:07,160 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:07,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1886699324, now seen corresponding path program 18 times [2020-11-07 06:36:07,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:07,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917765107] [2020-11-07 06:36:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:08,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:08,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917765107] [2020-11-07 06:36:08,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:08,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-11-07 06:36:08,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639884183] [2020-11-07 06:36:08,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-07 06:36:08,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:08,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-07 06:36:08,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:36:08,045 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 40 states. [2020-11-07 06:36:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:09,479 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-11-07 06:36:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-07 06:36:09,479 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 112 [2020-11-07 06:36:09,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:09,481 INFO L225 Difference]: With dead ends: 128 [2020-11-07 06:36:09,481 INFO L226 Difference]: Without dead ends: 121 [2020-11-07 06:36:09,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 06:36:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-11-07 06:36:09,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2020-11-07 06:36:09,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-11-07 06:36:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-11-07 06:36:09,490 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 112 [2020-11-07 06:36:09,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:09,490 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-11-07 06:36:09,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-07 06:36:09,490 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-11-07 06:36:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-11-07 06:36:09,492 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:09,492 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:09,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 06:36:09,492 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:09,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1102506676, now seen corresponding path program 19 times [2020-11-07 06:36:09,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:09,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832145474] [2020-11-07 06:36:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:10,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:10,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832145474] [2020-11-07 06:36:10,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:10,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-11-07 06:36:10,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933197151] [2020-11-07 06:36:10,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 06:36:10,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:10,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 06:36:10,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 06:36:10,457 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 42 states. [2020-11-07 06:36:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:11,943 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2020-11-07 06:36:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-07 06:36:11,945 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 117 [2020-11-07 06:36:11,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:11,946 INFO L225 Difference]: With dead ends: 133 [2020-11-07 06:36:11,946 INFO L226 Difference]: Without dead ends: 126 [2020-11-07 06:36:11,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 06:36:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-07 06:36:11,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-11-07 06:36:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-11-07 06:36:11,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-11-07 06:36:11,957 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 117 [2020-11-07 06:36:11,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:11,957 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-11-07 06:36:11,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 06:36:11,957 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-11-07 06:36:11,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-11-07 06:36:11,960 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:11,960 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:11,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 06:36:11,960 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:11,961 INFO L82 PathProgramCache]: Analyzing trace with hash 383593020, now seen corresponding path program 20 times [2020-11-07 06:36:11,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:11,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109150405] [2020-11-07 06:36:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:12,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:12,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109150405] [2020-11-07 06:36:12,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:12,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-11-07 06:36:12,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497513780] [2020-11-07 06:36:12,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 06:36:12,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 06:36:12,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 06:36:12,999 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 44 states. [2020-11-07 06:36:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:14,542 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-11-07 06:36:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-07 06:36:14,546 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 122 [2020-11-07 06:36:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:14,548 INFO L225 Difference]: With dead ends: 138 [2020-11-07 06:36:14,548 INFO L226 Difference]: Without dead ends: 131 [2020-11-07 06:36:14,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 06:36:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-07 06:36:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-11-07 06:36:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-11-07 06:36:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2020-11-07 06:36:14,556 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 122 [2020-11-07 06:36:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:14,556 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2020-11-07 06:36:14,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 06:36:14,557 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2020-11-07 06:36:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-07 06:36:14,557 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:14,557 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:14,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 06:36:14,558 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:14,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:14,558 INFO L82 PathProgramCache]: Analyzing trace with hash -220635212, now seen corresponding path program 21 times [2020-11-07 06:36:14,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:14,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171012259] [2020-11-07 06:36:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:15,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:15,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171012259] [2020-11-07 06:36:15,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:15,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-11-07 06:36:15,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980146561] [2020-11-07 06:36:15,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-07 06:36:15,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:15,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-07 06:36:15,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 06:36:15,701 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 46 states. [2020-11-07 06:36:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:17,566 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2020-11-07 06:36:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-07 06:36:17,567 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 127 [2020-11-07 06:36:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:17,568 INFO L225 Difference]: With dead ends: 143 [2020-11-07 06:36:17,568 INFO L226 Difference]: Without dead ends: 136 [2020-11-07 06:36:17,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-11-07 06:36:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-07 06:36:17,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2020-11-07 06:36:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-07 06:36:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-11-07 06:36:17,575 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 127 [2020-11-07 06:36:17,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:17,576 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-11-07 06:36:17,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-07 06:36:17,576 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-11-07 06:36:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-07 06:36:17,577 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:17,577 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:17,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 06:36:17,577 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:17,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:17,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1912329532, now seen corresponding path program 22 times [2020-11-07 06:36:17,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:17,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364505965] [2020-11-07 06:36:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:18,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:18,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364505965] [2020-11-07 06:36:18,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:18,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-11-07 06:36:18,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213939703] [2020-11-07 06:36:18,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 06:36:18,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:18,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 06:36:18,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 06:36:18,771 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 48 states. [2020-11-07 06:36:20,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:20,758 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-11-07 06:36:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-11-07 06:36:20,759 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 132 [2020-11-07 06:36:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:20,761 INFO L225 Difference]: With dead ends: 148 [2020-11-07 06:36:20,761 INFO L226 Difference]: Without dead ends: 141 [2020-11-07 06:36:20,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-11-07 06:36:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-07 06:36:20,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2020-11-07 06:36:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-07 06:36:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2020-11-07 06:36:20,769 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 132 [2020-11-07 06:36:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:20,769 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2020-11-07 06:36:20,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 06:36:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2020-11-07 06:36:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-11-07 06:36:20,770 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:20,770 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:20,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 06:36:20,771 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:20,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:20,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1490185036, now seen corresponding path program 23 times [2020-11-07 06:36:20,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:20,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686101359] [2020-11-07 06:36:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:22,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:22,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686101359] [2020-11-07 06:36:22,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:22,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-11-07 06:36:22,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067985413] [2020-11-07 06:36:22,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-07 06:36:22,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-07 06:36:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 06:36:22,141 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 50 states. [2020-11-07 06:36:24,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:24,353 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2020-11-07 06:36:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-07 06:36:24,359 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 137 [2020-11-07 06:36:24,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:24,361 INFO L225 Difference]: With dead ends: 153 [2020-11-07 06:36:24,361 INFO L226 Difference]: Without dead ends: 146 [2020-11-07 06:36:24,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-11-07 06:36:24,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-07 06:36:24,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-11-07 06:36:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-07 06:36:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-11-07 06:36:24,369 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 137 [2020-11-07 06:36:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:24,370 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-11-07 06:36:24,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-07 06:36:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-11-07 06:36:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-11-07 06:36:24,371 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:24,371 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:24,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 06:36:24,371 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:24,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:24,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1023360964, now seen corresponding path program 24 times [2020-11-07 06:36:24,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:24,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838386850] [2020-11-07 06:36:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:25,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:25,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838386850] [2020-11-07 06:36:25,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:25,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-11-07 06:36:25,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628582241] [2020-11-07 06:36:25,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-07 06:36:25,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:25,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-07 06:36:25,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 06:36:25,834 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 52 states. [2020-11-07 06:36:28,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:28,311 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-11-07 06:36:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-07 06:36:28,312 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 142 [2020-11-07 06:36:28,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:28,314 INFO L225 Difference]: With dead ends: 158 [2020-11-07 06:36:28,314 INFO L226 Difference]: Without dead ends: 151 [2020-11-07 06:36:28,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 06:36:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-11-07 06:36:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2020-11-07 06:36:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-11-07 06:36:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2020-11-07 06:36:28,323 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 142 [2020-11-07 06:36:28,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:28,323 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2020-11-07 06:36:28,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-07 06:36:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2020-11-07 06:36:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-11-07 06:36:28,324 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:28,324 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:28,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 06:36:28,325 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1535347124, now seen corresponding path program 25 times [2020-11-07 06:36:28,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:28,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701489751] [2020-11-07 06:36:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:29,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:29,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701489751] [2020-11-07 06:36:29,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:29,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-11-07 06:36:29,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736101733] [2020-11-07 06:36:29,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-07 06:36:29,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:29,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-07 06:36:29,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 06:36:29,870 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 54 states. [2020-11-07 06:36:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:32,490 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2020-11-07 06:36:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-07 06:36:32,491 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 147 [2020-11-07 06:36:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:32,493 INFO L225 Difference]: With dead ends: 163 [2020-11-07 06:36:32,493 INFO L226 Difference]: Without dead ends: 156 [2020-11-07 06:36:32,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-11-07 06:36:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-11-07 06:36:32,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-11-07 06:36:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-11-07 06:36:32,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-11-07 06:36:32,508 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 147 [2020-11-07 06:36:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:32,509 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-11-07 06:36:32,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-07 06:36:32,509 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-11-07 06:36:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-11-07 06:36:32,510 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:32,510 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:32,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 06:36:32,510 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:32,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:32,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1893995716, now seen corresponding path program 26 times [2020-11-07 06:36:32,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:32,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678077130] [2020-11-07 06:36:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:34,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:34,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678077130] [2020-11-07 06:36:34,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:34,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-11-07 06:36:34,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123093004] [2020-11-07 06:36:34,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-07 06:36:34,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:34,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-07 06:36:34,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 06:36:34,176 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 56 states. [2020-11-07 06:36:36,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:36,991 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-11-07 06:36:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-11-07 06:36:36,992 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 152 [2020-11-07 06:36:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:36,993 INFO L225 Difference]: With dead ends: 168 [2020-11-07 06:36:36,993 INFO L226 Difference]: Without dead ends: 161 [2020-11-07 06:36:36,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-11-07 06:36:36,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-11-07 06:36:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2020-11-07 06:36:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 06:36:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2020-11-07 06:36:37,002 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 152 [2020-11-07 06:36:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:37,003 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2020-11-07 06:36:37,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-07 06:36:37,003 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2020-11-07 06:36:37,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-07 06:36:37,004 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:37,004 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:37,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 06:36:37,004 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:37,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1219182260, now seen corresponding path program 27 times [2020-11-07 06:36:37,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:37,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496909910] [2020-11-07 06:36:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:38,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:38,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496909910] [2020-11-07 06:36:38,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:38,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-11-07 06:36:38,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404770109] [2020-11-07 06:36:38,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-07 06:36:38,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:38,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-07 06:36:38,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 06:36:38,829 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 58 states. [2020-11-07 06:36:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:41,797 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2020-11-07 06:36:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-11-07 06:36:41,797 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 157 [2020-11-07 06:36:41,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:41,799 INFO L225 Difference]: With dead ends: 173 [2020-11-07 06:36:41,799 INFO L226 Difference]: Without dead ends: 166 [2020-11-07 06:36:41,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-11-07 06:36:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-07 06:36:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-11-07 06:36:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-11-07 06:36:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-11-07 06:36:41,808 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 157 [2020-11-07 06:36:41,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:41,809 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-11-07 06:36:41,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-11-07 06:36:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-11-07 06:36:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-11-07 06:36:41,810 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:41,810 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:41,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 06:36:41,810 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:41,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:41,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1619175876, now seen corresponding path program 28 times [2020-11-07 06:36:41,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:41,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491461690] [2020-11-07 06:36:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:43,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:43,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491461690] [2020-11-07 06:36:43,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:43,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-11-07 06:36:43,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646252481] [2020-11-07 06:36:43,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-07 06:36:43,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:43,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-07 06:36:43,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 06:36:43,796 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 60 states. [2020-11-07 06:36:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:47,041 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2020-11-07 06:36:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-11-07 06:36:47,042 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 162 [2020-11-07 06:36:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:47,044 INFO L225 Difference]: With dead ends: 178 [2020-11-07 06:36:47,044 INFO L226 Difference]: Without dead ends: 171 [2020-11-07 06:36:47,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-11-07 06:36:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-07 06:36:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2020-11-07 06:36:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-11-07 06:36:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2020-11-07 06:36:47,053 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 162 [2020-11-07 06:36:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:47,054 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2020-11-07 06:36:47,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-07 06:36:47,054 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2020-11-07 06:36:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-11-07 06:36:47,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:47,055 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:47,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 06:36:47,055 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:47,056 INFO L82 PathProgramCache]: Analyzing trace with hash -478891084, now seen corresponding path program 29 times [2020-11-07 06:36:47,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:47,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384336776] [2020-11-07 06:36:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:49,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:49,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384336776] [2020-11-07 06:36:49,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:49,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-11-07 06:36:49,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58381725] [2020-11-07 06:36:49,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-07 06:36:49,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:49,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-07 06:36:49,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-11-07 06:36:49,146 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 62 states. [2020-11-07 06:36:52,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:52,602 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2020-11-07 06:36:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-11-07 06:36:52,603 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 167 [2020-11-07 06:36:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:52,605 INFO L225 Difference]: With dead ends: 183 [2020-11-07 06:36:52,605 INFO L226 Difference]: Without dead ends: 176 [2020-11-07 06:36:52,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-11-07 06:36:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-11-07 06:36:52,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2020-11-07 06:36:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-11-07 06:36:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-11-07 06:36:52,613 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 167 [2020-11-07 06:36:52,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:52,613 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-11-07 06:36:52,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-11-07 06:36:52,614 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-11-07 06:36:52,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-11-07 06:36:52,615 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:52,615 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:52,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 06:36:52,615 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:52,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:52,616 INFO L82 PathProgramCache]: Analyzing trace with hash 22348092, now seen corresponding path program 30 times [2020-11-07 06:36:52,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:52,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023890249] [2020-11-07 06:36:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:54,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:54,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023890249] [2020-11-07 06:36:54,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:54,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-11-07 06:36:54,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401912106] [2020-11-07 06:36:54,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-11-07 06:36:54,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:54,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-11-07 06:36:54,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 06:36:54,842 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 64 states. [2020-11-07 06:36:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:58,535 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2020-11-07 06:36:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-11-07 06:36:58,535 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 172 [2020-11-07 06:36:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:58,538 INFO L225 Difference]: With dead ends: 188 [2020-11-07 06:36:58,538 INFO L226 Difference]: Without dead ends: 181 [2020-11-07 06:36:58,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-11-07 06:36:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-11-07 06:36:58,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-11-07 06:36:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-11-07 06:36:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2020-11-07 06:36:58,547 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 172 [2020-11-07 06:36:58,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:58,547 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2020-11-07 06:36:58,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-11-07 06:36:58,548 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2020-11-07 06:36:58,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-11-07 06:36:58,548 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:58,549 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:36:58,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 06:36:58,549 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:58,549 INFO L82 PathProgramCache]: Analyzing trace with hash -592451404, now seen corresponding path program 31 times [2020-11-07 06:36:58,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:58,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440772493] [2020-11-07 06:36:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:00,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:00,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440772493] [2020-11-07 06:37:00,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:00,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-11-07 06:37:00,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396711625] [2020-11-07 06:37:00,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-11-07 06:37:00,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-11-07 06:37:00,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-11-07 06:37:00,961 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 66 states. [2020-11-07 06:37:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:04,729 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2020-11-07 06:37:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-11-07 06:37:04,730 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 177 [2020-11-07 06:37:04,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:04,733 INFO L225 Difference]: With dead ends: 193 [2020-11-07 06:37:04,733 INFO L226 Difference]: Without dead ends: 186 [2020-11-07 06:37:04,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-11-07 06:37:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-07 06:37:04,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2020-11-07 06:37:04,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-11-07 06:37:04,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-11-07 06:37:04,743 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 177 [2020-11-07 06:37:04,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:04,743 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-11-07 06:37:04,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-11-07 06:37:04,744 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-11-07 06:37:04,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-11-07 06:37:04,745 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:04,745 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:04,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 06:37:04,745 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:04,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:04,746 INFO L82 PathProgramCache]: Analyzing trace with hash 97709116, now seen corresponding path program 32 times [2020-11-07 06:37:04,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:04,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064304911] [2020-11-07 06:37:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:07,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:07,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064304911] [2020-11-07 06:37:07,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:07,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-11-07 06:37:07,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385409160] [2020-11-07 06:37:07,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-07 06:37:07,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-07 06:37:07,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-11-07 06:37:07,331 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 68 states. [2020-11-07 06:37:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:11,485 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2020-11-07 06:37:11,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-11-07 06:37:11,486 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 182 [2020-11-07 06:37:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:11,488 INFO L225 Difference]: With dead ends: 198 [2020-11-07 06:37:11,488 INFO L226 Difference]: Without dead ends: 191 [2020-11-07 06:37:11,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-11-07 06:37:11,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-11-07 06:37:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2020-11-07 06:37:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-11-07 06:37:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2020-11-07 06:37:11,498 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 182 [2020-11-07 06:37:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:11,498 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2020-11-07 06:37:11,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-07 06:37:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2020-11-07 06:37:11,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-11-07 06:37:11,500 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:11,500 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:11,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 06:37:11,500 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:11,500 INFO L82 PathProgramCache]: Analyzing trace with hash 556588468, now seen corresponding path program 33 times [2020-11-07 06:37:11,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:11,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326426659] [2020-11-07 06:37:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:14,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:14,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326426659] [2020-11-07 06:37:14,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:14,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-11-07 06:37:14,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130095319] [2020-11-07 06:37:14,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-11-07 06:37:14,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:14,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-11-07 06:37:14,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 06:37:14,283 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 70 states. [2020-11-07 06:37:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:18,541 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2020-11-07 06:37:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-11-07 06:37:18,542 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 187 [2020-11-07 06:37:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:18,544 INFO L225 Difference]: With dead ends: 203 [2020-11-07 06:37:18,544 INFO L226 Difference]: Without dead ends: 196 [2020-11-07 06:37:18,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-11-07 06:37:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-11-07 06:37:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2020-11-07 06:37:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-11-07 06:37:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2020-11-07 06:37:18,553 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 187 [2020-11-07 06:37:18,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:18,554 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2020-11-07 06:37:18,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-11-07 06:37:18,554 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2020-11-07 06:37:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-11-07 06:37:18,555 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:18,555 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:18,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 06:37:18,555 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:18,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1109858108, now seen corresponding path program 34 times [2020-11-07 06:37:18,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:18,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728479290] [2020-11-07 06:37:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:21,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:21,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728479290] [2020-11-07 06:37:21,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:21,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-11-07 06:37:21,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956738133] [2020-11-07 06:37:21,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-11-07 06:37:21,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:21,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-11-07 06:37:21,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-11-07 06:37:21,389 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 72 states. [2020-11-07 06:37:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:25,871 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2020-11-07 06:37:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-11-07 06:37:25,872 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 192 [2020-11-07 06:37:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:25,874 INFO L225 Difference]: With dead ends: 208 [2020-11-07 06:37:25,874 INFO L226 Difference]: Without dead ends: 201 [2020-11-07 06:37:25,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-11-07 06:37:25,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-07 06:37:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-11-07 06:37:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-11-07 06:37:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2020-11-07 06:37:25,884 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 192 [2020-11-07 06:37:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:25,884 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2020-11-07 06:37:25,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-11-07 06:37:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2020-11-07 06:37:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-11-07 06:37:25,886 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:25,886 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:25,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 06:37:25,886 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:25,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash -642018636, now seen corresponding path program 35 times [2020-11-07 06:37:25,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:25,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633637317] [2020-11-07 06:37:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:28,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:28,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633637317] [2020-11-07 06:37:28,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:28,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-11-07 06:37:28,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346792795] [2020-11-07 06:37:28,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-11-07 06:37:28,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:28,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-11-07 06:37:28,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 06:37:28,935 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 74 states. [2020-11-07 06:37:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:33,724 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2020-11-07 06:37:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-11-07 06:37:33,725 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 197 [2020-11-07 06:37:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:33,727 INFO L225 Difference]: With dead ends: 213 [2020-11-07 06:37:33,727 INFO L226 Difference]: Without dead ends: 206 [2020-11-07 06:37:33,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-11-07 06:37:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-11-07 06:37:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-11-07 06:37:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-11-07 06:37:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2020-11-07 06:37:33,737 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 197 [2020-11-07 06:37:33,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:33,737 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2020-11-07 06:37:33,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-11-07 06:37:33,737 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2020-11-07 06:37:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-11-07 06:37:33,738 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:33,738 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:33,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 06:37:33,739 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:33,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:33,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1887337924, now seen corresponding path program 36 times [2020-11-07 06:37:33,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:33,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028790582] [2020-11-07 06:37:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:37,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:37,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028790582] [2020-11-07 06:37:37,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:37,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-11-07 06:37:37,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623159491] [2020-11-07 06:37:37,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-11-07 06:37:37,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:37,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-11-07 06:37:37,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-11-07 06:37:37,038 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 76 states. [2020-11-07 06:37:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:42,283 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2020-11-07 06:37:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-11-07 06:37:42,284 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 202 [2020-11-07 06:37:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:42,286 INFO L225 Difference]: With dead ends: 218 [2020-11-07 06:37:42,286 INFO L226 Difference]: Without dead ends: 211 [2020-11-07 06:37:42,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-11-07 06:37:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-07 06:37:42,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-11-07 06:37:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-11-07 06:37:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2020-11-07 06:37:42,296 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 202 [2020-11-07 06:37:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:42,296 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2020-11-07 06:37:42,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-11-07 06:37:42,296 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2020-11-07 06:37:42,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-11-07 06:37:42,297 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:42,297 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:42,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 06:37:42,298 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:42,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:42,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1798047668, now seen corresponding path program 37 times [2020-11-07 06:37:42,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:42,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844701555] [2020-11-07 06:37:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:45,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:45,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844701555] [2020-11-07 06:37:45,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:45,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-11-07 06:37:45,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266385010] [2020-11-07 06:37:45,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-11-07 06:37:45,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:45,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-11-07 06:37:45,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-11-07 06:37:45,772 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 78 states. [2020-11-07 06:37:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:51,396 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2020-11-07 06:37:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-11-07 06:37:51,397 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 207 [2020-11-07 06:37:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:51,399 INFO L225 Difference]: With dead ends: 223 [2020-11-07 06:37:51,400 INFO L226 Difference]: Without dead ends: 216 [2020-11-07 06:37:51,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-11-07 06:37:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-11-07 06:37:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2020-11-07 06:37:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-11-07 06:37:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2020-11-07 06:37:51,408 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 207 [2020-11-07 06:37:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:51,409 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2020-11-07 06:37:51,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-11-07 06:37:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2020-11-07 06:37:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-11-07 06:37:51,410 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:51,410 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:37:51,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 06:37:51,410 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:51,411 INFO L82 PathProgramCache]: Analyzing trace with hash 185740604, now seen corresponding path program 38 times [2020-11-07 06:37:51,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:51,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469959183] [2020-11-07 06:37:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:55,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:37:55,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469959183] [2020-11-07 06:37:55,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:55,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-11-07 06:37:55,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843134319] [2020-11-07 06:37:55,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-07 06:37:55,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:55,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-07 06:37:55,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-11-07 06:37:55,144 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 80 states. [2020-11-07 06:38:01,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:01,107 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2020-11-07 06:38:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-11-07 06:38:01,108 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 212 [2020-11-07 06:38:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:01,109 INFO L225 Difference]: With dead ends: 228 [2020-11-07 06:38:01,110 INFO L226 Difference]: Without dead ends: 221 [2020-11-07 06:38:01,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-11-07 06:38:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-11-07 06:38:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2020-11-07 06:38:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-11-07 06:38:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2020-11-07 06:38:01,118 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 212 [2020-11-07 06:38:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:01,119 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2020-11-07 06:38:01,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-07 06:38:01,119 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2020-11-07 06:38:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-11-07 06:38:01,120 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:01,120 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:01,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 06:38:01,121 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1984838836, now seen corresponding path program 39 times [2020-11-07 06:38:01,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:01,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85559715] [2020-11-07 06:38:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:05,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:38:05,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85559715] [2020-11-07 06:38:05,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:05,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-11-07 06:38:05,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667783074] [2020-11-07 06:38:05,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-11-07 06:38:05,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:05,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-11-07 06:38:05,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-11-07 06:38:05,146 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 82 states. [2020-11-07 06:38:11,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:11,350 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2020-11-07 06:38:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-11-07 06:38:11,351 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 217 [2020-11-07 06:38:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:11,353 INFO L225 Difference]: With dead ends: 233 [2020-11-07 06:38:11,353 INFO L226 Difference]: Without dead ends: 226 [2020-11-07 06:38:11,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-11-07 06:38:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-07 06:38:11,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2020-11-07 06:38:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-11-07 06:38:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2020-11-07 06:38:11,362 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 217 [2020-11-07 06:38:11,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:11,362 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2020-11-07 06:38:11,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-11-07 06:38:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2020-11-07 06:38:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-11-07 06:38:11,363 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:11,364 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:11,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 06:38:11,364 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:11,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:11,364 INFO L82 PathProgramCache]: Analyzing trace with hash 369694780, now seen corresponding path program 40 times [2020-11-07 06:38:11,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:11,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545518878] [2020-11-07 06:38:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:15,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:38:15,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545518878] [2020-11-07 06:38:15,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:15,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-11-07 06:38:15,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430596155] [2020-11-07 06:38:15,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-11-07 06:38:15,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:15,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-11-07 06:38:15,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 06:38:15,532 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 84 states. [2020-11-07 06:38:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:22,255 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2020-11-07 06:38:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-11-07 06:38:22,256 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 222 [2020-11-07 06:38:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:22,258 INFO L225 Difference]: With dead ends: 238 [2020-11-07 06:38:22,258 INFO L226 Difference]: Without dead ends: 231 [2020-11-07 06:38:22,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-11-07 06:38:22,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-11-07 06:38:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2020-11-07 06:38:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-11-07 06:38:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2020-11-07 06:38:22,268 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 222 [2020-11-07 06:38:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:22,268 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2020-11-07 06:38:22,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-11-07 06:38:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2020-11-07 06:38:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-11-07 06:38:22,270 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:22,270 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:22,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 06:38:22,270 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:22,271 INFO L82 PathProgramCache]: Analyzing trace with hash -671993420, now seen corresponding path program 41 times [2020-11-07 06:38:22,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:22,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999550575] [2020-11-07 06:38:22,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:26,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:38:26,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999550575] [2020-11-07 06:38:26,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:26,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-11-07 06:38:26,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119899959] [2020-11-07 06:38:26,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-11-07 06:38:26,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:26,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-11-07 06:38:26,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-11-07 06:38:26,764 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 86 states. [2020-11-07 06:38:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:33,901 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2020-11-07 06:38:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-11-07 06:38:33,902 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 227 [2020-11-07 06:38:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:33,904 INFO L225 Difference]: With dead ends: 243 [2020-11-07 06:38:33,904 INFO L226 Difference]: Without dead ends: 236 [2020-11-07 06:38:33,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-11-07 06:38:33,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-11-07 06:38:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2020-11-07 06:38:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-11-07 06:38:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2020-11-07 06:38:33,915 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 227 [2020-11-07 06:38:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:33,915 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2020-11-07 06:38:33,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-11-07 06:38:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2020-11-07 06:38:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-11-07 06:38:33,917 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:33,917 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:33,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 06:38:33,917 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:33,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:33,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1435910972, now seen corresponding path program 42 times [2020-11-07 06:38:33,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:33,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012193038] [2020-11-07 06:38:33,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:38,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:38:38,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012193038] [2020-11-07 06:38:38,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:38,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-11-07 06:38:38,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425129304] [2020-11-07 06:38:38,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-11-07 06:38:38,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:38,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-11-07 06:38:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-11-07 06:38:38,797 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 88 states. [2020-11-07 06:38:46,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:46,148 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2020-11-07 06:38:46,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-11-07 06:38:46,149 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 232 [2020-11-07 06:38:46,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:46,151 INFO L225 Difference]: With dead ends: 248 [2020-11-07 06:38:46,151 INFO L226 Difference]: Without dead ends: 241 [2020-11-07 06:38:46,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-11-07 06:38:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-11-07 06:38:46,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2020-11-07 06:38:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-11-07 06:38:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2020-11-07 06:38:46,161 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 232 [2020-11-07 06:38:46,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:46,162 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2020-11-07 06:38:46,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-11-07 06:38:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2020-11-07 06:38:46,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-11-07 06:38:46,163 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:46,163 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:46,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 06:38:46,164 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1461197132, now seen corresponding path program 43 times [2020-11-07 06:38:46,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:46,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570864220] [2020-11-07 06:38:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:51,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:38:51,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570864220] [2020-11-07 06:38:51,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:51,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-11-07 06:38:51,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568073885] [2020-11-07 06:38:51,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-11-07 06:38:51,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-11-07 06:38:51,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-11-07 06:38:51,155 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 90 states. [2020-11-07 06:38:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:59,139 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2020-11-07 06:38:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-11-07 06:38:59,140 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 237 [2020-11-07 06:38:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:59,143 INFO L225 Difference]: With dead ends: 253 [2020-11-07 06:38:59,143 INFO L226 Difference]: Without dead ends: 246 [2020-11-07 06:38:59,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-11-07 06:38:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-11-07 06:38:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-11-07 06:38:59,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-11-07 06:38:59,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2020-11-07 06:38:59,164 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 237 [2020-11-07 06:38:59,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:59,164 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2020-11-07 06:38:59,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-11-07 06:38:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2020-11-07 06:38:59,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-11-07 06:38:59,166 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:59,166 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:38:59,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 06:38:59,166 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:59,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1293308356, now seen corresponding path program 44 times [2020-11-07 06:38:59,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:59,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447753781] [2020-11-07 06:38:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:04,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:04,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447753781] [2020-11-07 06:39:04,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:04,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-11-07 06:39:04,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730297179] [2020-11-07 06:39:04,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-11-07 06:39:04,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:04,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-11-07 06:39:04,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-11-07 06:39:04,489 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 92 states. [2020-11-07 06:39:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:12,956 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2020-11-07 06:39:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-11-07 06:39:12,957 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 242 [2020-11-07 06:39:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:12,959 INFO L225 Difference]: With dead ends: 258 [2020-11-07 06:39:12,959 INFO L226 Difference]: Without dead ends: 251 [2020-11-07 06:39:12,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-11-07 06:39:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-11-07 06:39:12,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 248. [2020-11-07 06:39:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-11-07 06:39:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2020-11-07 06:39:12,970 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 242 [2020-11-07 06:39:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:12,970 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2020-11-07 06:39:12,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-11-07 06:39:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2020-11-07 06:39:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-11-07 06:39:12,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:12,972 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:12,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 06:39:12,972 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:12,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1040145332, now seen corresponding path program 45 times [2020-11-07 06:39:12,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:12,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451619905] [2020-11-07 06:39:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:18,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:18,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451619905] [2020-11-07 06:39:18,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:18,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-11-07 06:39:18,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758019005] [2020-11-07 06:39:18,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-11-07 06:39:18,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-11-07 06:39:18,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-11-07 06:39:18,703 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 94 states. [2020-11-07 06:39:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:27,664 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2020-11-07 06:39:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-11-07 06:39:27,665 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 247 [2020-11-07 06:39:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:27,667 INFO L225 Difference]: With dead ends: 263 [2020-11-07 06:39:27,667 INFO L226 Difference]: Without dead ends: 256 [2020-11-07 06:39:27,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-11-07 06:39:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-11-07 06:39:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2020-11-07 06:39:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-11-07 06:39:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2020-11-07 06:39:27,677 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 247 [2020-11-07 06:39:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:27,678 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2020-11-07 06:39:27,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-11-07 06:39:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2020-11-07 06:39:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-11-07 06:39:27,679 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:27,679 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:27,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 06:39:27,680 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:27,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:27,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1530091836, now seen corresponding path program 46 times [2020-11-07 06:39:27,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:27,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010948560] [2020-11-07 06:39:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:33,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:33,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010948560] [2020-11-07 06:39:33,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:33,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-11-07 06:39:33,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674620521] [2020-11-07 06:39:33,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-11-07 06:39:33,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:33,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-11-07 06:39:33,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-11-07 06:39:33,692 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 96 states. [2020-11-07 06:39:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:42,762 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2020-11-07 06:39:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-11-07 06:39:42,764 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 252 [2020-11-07 06:39:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:42,766 INFO L225 Difference]: With dead ends: 268 [2020-11-07 06:39:42,766 INFO L226 Difference]: Without dead ends: 261 [2020-11-07 06:39:42,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-11-07 06:39:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-11-07 06:39:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2020-11-07 06:39:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-11-07 06:39:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 258 transitions. [2020-11-07 06:39:42,776 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 258 transitions. Word has length 252 [2020-11-07 06:39:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:42,776 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 258 transitions. [2020-11-07 06:39:42,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-11-07 06:39:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 258 transitions. [2020-11-07 06:39:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-11-07 06:39:42,778 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:42,778 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:42,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 06:39:42,779 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:42,779 INFO L82 PathProgramCache]: Analyzing trace with hash 671649972, now seen corresponding path program 47 times [2020-11-07 06:39:42,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:42,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503513600] [2020-11-07 06:39:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:49,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:49,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503513600] [2020-11-07 06:39:49,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:49,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2020-11-07 06:39:49,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660894268] [2020-11-07 06:39:49,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-11-07 06:39:49,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:49,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-11-07 06:39:49,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-11-07 06:39:49,106 INFO L87 Difference]: Start difference. First operand 258 states and 258 transitions. Second operand 98 states. [2020-11-07 06:39:58,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:58,995 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2020-11-07 06:39:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-11-07 06:39:58,996 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 257 [2020-11-07 06:39:58,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:58,998 INFO L225 Difference]: With dead ends: 273 [2020-11-07 06:39:58,998 INFO L226 Difference]: Without dead ends: 266 [2020-11-07 06:39:59,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-11-07 06:39:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-11-07 06:39:59,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2020-11-07 06:39:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-11-07 06:39:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2020-11-07 06:39:59,008 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 257 [2020-11-07 06:39:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:59,009 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2020-11-07 06:39:59,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-11-07 06:39:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2020-11-07 06:39:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-11-07 06:39:59,010 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:59,011 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:59,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 06:39:59,011 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:59,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1079819204, now seen corresponding path program 48 times [2020-11-07 06:39:59,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:59,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393018424] [2020-11-07 06:39:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:05,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:05,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393018424] [2020-11-07 06:40:05,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:05,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-11-07 06:40:05,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272116343] [2020-11-07 06:40:05,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-11-07 06:40:05,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-11-07 06:40:05,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-11-07 06:40:05,783 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 100 states. [2020-11-07 06:40:16,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:16,074 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2020-11-07 06:40:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-11-07 06:40:16,075 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 262 [2020-11-07 06:40:16,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:16,077 INFO L225 Difference]: With dead ends: 278 [2020-11-07 06:40:16,077 INFO L226 Difference]: Without dead ends: 271 [2020-11-07 06:40:16,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-11-07 06:40:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-11-07 06:40:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 268. [2020-11-07 06:40:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-11-07 06:40:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2020-11-07 06:40:16,086 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 262 [2020-11-07 06:40:16,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:16,087 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2020-11-07 06:40:16,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-11-07 06:40:16,087 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2020-11-07 06:40:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-11-07 06:40:16,089 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:16,089 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:16,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 06:40:16,089 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:16,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash 869500340, now seen corresponding path program 49 times [2020-11-07 06:40:16,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:16,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549044036] [2020-11-07 06:40:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:23,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:23,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549044036] [2020-11-07 06:40:23,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:23,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2020-11-07 06:40:23,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248502737] [2020-11-07 06:40:23,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-11-07 06:40:23,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:23,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-11-07 06:40:23,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-11-07 06:40:23,314 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 102 states. [2020-11-07 06:40:34,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:34,611 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2020-11-07 06:40:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-11-07 06:40:34,616 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 267 [2020-11-07 06:40:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:34,618 INFO L225 Difference]: With dead ends: 283 [2020-11-07 06:40:34,618 INFO L226 Difference]: Without dead ends: 276 [2020-11-07 06:40:34,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-11-07 06:40:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-11-07 06:40:34,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 273. [2020-11-07 06:40:34,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-11-07 06:40:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2020-11-07 06:40:34,629 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 267 [2020-11-07 06:40:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:34,629 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2020-11-07 06:40:34,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-11-07 06:40:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2020-11-07 06:40:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-11-07 06:40:34,634 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:34,634 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:34,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 06:40:34,634 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:34,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1788252356, now seen corresponding path program 50 times [2020-11-07 06:40:34,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:34,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804407028] [2020-11-07 06:40:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:42,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:40:42,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804407028] [2020-11-07 06:40:42,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:42,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2020-11-07 06:40:42,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710836841] [2020-11-07 06:40:42,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-11-07 06:40:42,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:42,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-11-07 06:40:42,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-11-07 06:40:42,349 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 104 states. [2020-11-07 06:40:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:54,169 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2020-11-07 06:40:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-11-07 06:40:54,171 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 272 [2020-11-07 06:40:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:54,173 INFO L225 Difference]: With dead ends: 288 [2020-11-07 06:40:54,173 INFO L226 Difference]: Without dead ends: 281 [2020-11-07 06:40:54,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-11-07 06:40:54,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-11-07 06:40:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2020-11-07 06:40:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-11-07 06:40:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2020-11-07 06:40:54,185 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 272 [2020-11-07 06:40:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:54,185 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2020-11-07 06:40:54,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-11-07 06:40:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2020-11-07 06:40:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-11-07 06:40:54,187 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:54,187 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:54,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-07 06:40:54,188 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1781545652, now seen corresponding path program 51 times [2020-11-07 06:40:54,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:54,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892132833] [2020-11-07 06:40:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:02,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:02,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892132833] [2020-11-07 06:41:02,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:02,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2020-11-07 06:41:02,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386540113] [2020-11-07 06:41:02,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-11-07 06:41:02,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:02,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-11-07 06:41:02,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-11-07 06:41:02,359 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 106 states. [2020-11-07 06:41:15,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:15,259 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2020-11-07 06:41:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-11-07 06:41:15,260 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 277 [2020-11-07 06:41:15,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:15,262 INFO L225 Difference]: With dead ends: 293 [2020-11-07 06:41:15,262 INFO L226 Difference]: Without dead ends: 286 [2020-11-07 06:41:15,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-11-07 06:41:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-11-07 06:41:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 283. [2020-11-07 06:41:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-11-07 06:41:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2020-11-07 06:41:15,274 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 277 [2020-11-07 06:41:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:15,275 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2020-11-07 06:41:15,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-11-07 06:41:15,275 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2020-11-07 06:41:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-11-07 06:41:15,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:15,276 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:15,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-07 06:41:15,276 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash -709502404, now seen corresponding path program 52 times [2020-11-07 06:41:15,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:15,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288351585] [2020-11-07 06:41:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:24,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:24,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288351585] [2020-11-07 06:41:24,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:24,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2020-11-07 06:41:24,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555599527] [2020-11-07 06:41:24,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-11-07 06:41:24,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:24,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-11-07 06:41:24,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-11-07 06:41:24,148 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 108 states. [2020-11-07 06:41:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:38,284 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2020-11-07 06:41:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-11-07 06:41:38,285 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 282 [2020-11-07 06:41:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:38,288 INFO L225 Difference]: With dead ends: 298 [2020-11-07 06:41:38,288 INFO L226 Difference]: Without dead ends: 291 [2020-11-07 06:41:38,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-11-07 06:41:38,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-07 06:41:38,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 288. [2020-11-07 06:41:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-11-07 06:41:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 288 transitions. [2020-11-07 06:41:38,302 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 288 transitions. Word has length 282 [2020-11-07 06:41:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:38,302 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 288 transitions. [2020-11-07 06:41:38,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-11-07 06:41:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 288 transitions. [2020-11-07 06:41:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-11-07 06:41:38,304 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:38,304 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:41:38,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-07 06:41:38,304 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:38,305 INFO L82 PathProgramCache]: Analyzing trace with hash 267300788, now seen corresponding path program 53 times [2020-11-07 06:41:38,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:38,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000165233] [2020-11-07 06:41:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:47,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:41:47,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000165233] [2020-11-07 06:41:47,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:47,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2020-11-07 06:41:47,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141215049] [2020-11-07 06:41:47,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-11-07 06:41:47,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:47,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-11-07 06:41:47,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-11-07 06:41:47,939 INFO L87 Difference]: Start difference. First operand 288 states and 288 transitions. Second operand 110 states. [2020-11-07 06:42:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:02,927 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2020-11-07 06:42:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-11-07 06:42:02,929 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 287 [2020-11-07 06:42:02,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:02,930 INFO L225 Difference]: With dead ends: 303 [2020-11-07 06:42:02,931 INFO L226 Difference]: Without dead ends: 296 [2020-11-07 06:42:02,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-11-07 06:42:02,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-11-07 06:42:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 293. [2020-11-07 06:42:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-11-07 06:42:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2020-11-07 06:42:02,945 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 287 [2020-11-07 06:42:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:02,946 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2020-11-07 06:42:02,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-11-07 06:42:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2020-11-07 06:42:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-11-07 06:42:02,948 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:02,948 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:02,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-07 06:42:02,948 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:02,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1111980740, now seen corresponding path program 54 times [2020-11-07 06:42:02,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:02,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192369396] [2020-11-07 06:42:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:13,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:13,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192369396] [2020-11-07 06:42:13,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:13,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2020-11-07 06:42:13,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070478066] [2020-11-07 06:42:13,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-11-07 06:42:13,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:13,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-11-07 06:42:13,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-11-07 06:42:13,318 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 112 states. [2020-11-07 06:42:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:29,673 INFO L93 Difference]: Finished difference Result 308 states and 308 transitions. [2020-11-07 06:42:29,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-11-07 06:42:29,675 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 292 [2020-11-07 06:42:29,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:29,677 INFO L225 Difference]: With dead ends: 308 [2020-11-07 06:42:29,677 INFO L226 Difference]: Without dead ends: 301 [2020-11-07 06:42:29,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-11-07 06:42:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-11-07 06:42:29,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-11-07 06:42:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-11-07 06:42:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 298 transitions. [2020-11-07 06:42:29,689 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 298 transitions. Word has length 292 [2020-11-07 06:42:29,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:29,690 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 298 transitions. [2020-11-07 06:42:29,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-11-07 06:42:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 298 transitions. [2020-11-07 06:42:29,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-11-07 06:42:29,692 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:29,692 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:29,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-07 06:42:29,692 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:29,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1512119116, now seen corresponding path program 55 times [2020-11-07 06:42:29,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:29,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854708897] [2020-11-07 06:42:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:40,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:42:40,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854708897] [2020-11-07 06:42:40,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:40,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2020-11-07 06:42:40,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951881651] [2020-11-07 06:42:40,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-11-07 06:42:40,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:40,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-11-07 06:42:40,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-11-07 06:42:40,962 INFO L87 Difference]: Start difference. First operand 298 states and 298 transitions. Second operand 114 states. [2020-11-07 06:42:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:58,708 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2020-11-07 06:42:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-11-07 06:42:58,710 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 297 [2020-11-07 06:42:58,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:58,713 INFO L225 Difference]: With dead ends: 313 [2020-11-07 06:42:58,713 INFO L226 Difference]: Without dead ends: 306 [2020-11-07 06:42:58,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-11-07 06:42:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-11-07 06:42:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 303. [2020-11-07 06:42:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-11-07 06:42:58,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2020-11-07 06:42:58,722 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 297 [2020-11-07 06:42:58,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:58,723 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2020-11-07 06:42:58,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-11-07 06:42:58,723 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2020-11-07 06:42:58,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-11-07 06:42:58,725 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:58,725 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:42:58,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-11-07 06:42:58,725 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:58,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:58,726 INFO L82 PathProgramCache]: Analyzing trace with hash -828280772, now seen corresponding path program 56 times [2020-11-07 06:42:58,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:58,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840424086] [2020-11-07 06:42:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:11,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:11,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840424086] [2020-11-07 06:43:11,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:11,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2020-11-07 06:43:11,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208665957] [2020-11-07 06:43:11,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-11-07 06:43:11,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:11,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-11-07 06:43:11,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-11-07 06:43:11,360 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 116 states. [2020-11-07 06:43:30,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:30,823 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2020-11-07 06:43:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-11-07 06:43:30,825 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 302 [2020-11-07 06:43:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:30,827 INFO L225 Difference]: With dead ends: 318 [2020-11-07 06:43:30,827 INFO L226 Difference]: Without dead ends: 311 [2020-11-07 06:43:30,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-11-07 06:43:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-11-07 06:43:30,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 308. [2020-11-07 06:43:30,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-11-07 06:43:30,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2020-11-07 06:43:30,837 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 302 [2020-11-07 06:43:30,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:30,838 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2020-11-07 06:43:30,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-11-07 06:43:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2020-11-07 06:43:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-11-07 06:43:30,839 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:30,839 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:43:30,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-11-07 06:43:30,839 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:30,840 INFO L82 PathProgramCache]: Analyzing trace with hash -388965964, now seen corresponding path program 57 times [2020-11-07 06:43:30,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:30,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673726018] [2020-11-07 06:43:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:44,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:43:44,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673726018] [2020-11-07 06:43:44,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:44,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2020-11-07 06:43:44,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697655142] [2020-11-07 06:43:44,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-11-07 06:43:44,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:44,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-11-07 06:43:44,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-11-07 06:43:44,665 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 118 states. [2020-11-07 06:44:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:06,523 INFO L93 Difference]: Finished difference Result 323 states and 323 transitions. [2020-11-07 06:44:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-11-07 06:44:06,525 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 307 [2020-11-07 06:44:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:06,527 INFO L225 Difference]: With dead ends: 323 [2020-11-07 06:44:06,527 INFO L226 Difference]: Without dead ends: 316 [2020-11-07 06:44:06,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-11-07 06:44:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-11-07 06:44:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 313. [2020-11-07 06:44:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-11-07 06:44:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2020-11-07 06:44:06,540 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 307 [2020-11-07 06:44:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:06,540 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2020-11-07 06:44:06,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-11-07 06:44:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2020-11-07 06:44:06,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-11-07 06:44:06,542 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:06,543 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:44:06,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-11-07 06:44:06,543 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:06,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:06,543 INFO L82 PathProgramCache]: Analyzing trace with hash -845112516, now seen corresponding path program 58 times [2020-11-07 06:44:06,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:06,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053247361] [2020-11-07 06:44:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:21,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:44:21,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053247361] [2020-11-07 06:44:21,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:21,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2020-11-07 06:44:21,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358625538] [2020-11-07 06:44:21,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-11-07 06:44:21,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:21,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-11-07 06:44:21,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-11-07 06:44:21,842 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand 120 states. [2020-11-07 06:44:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:45,309 INFO L93 Difference]: Finished difference Result 328 states and 328 transitions. [2020-11-07 06:44:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-11-07 06:44:45,312 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 312 [2020-11-07 06:44:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:45,315 INFO L225 Difference]: With dead ends: 328 [2020-11-07 06:44:45,315 INFO L226 Difference]: Without dead ends: 321 [2020-11-07 06:44:45,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-11-07 06:44:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-11-07 06:44:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2020-11-07 06:44:45,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-07 06:44:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 318 transitions. [2020-11-07 06:44:45,327 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 318 transitions. Word has length 312 [2020-11-07 06:44:45,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:45,327 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 318 transitions. [2020-11-07 06:44:45,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-11-07 06:44:45,328 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 318 transitions. [2020-11-07 06:44:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-11-07 06:44:45,329 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:45,330 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:44:45,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-11-07 06:44:45,330 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:45,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:45,331 INFO L82 PathProgramCache]: Analyzing trace with hash -778793292, now seen corresponding path program 59 times [2020-11-07 06:44:45,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:45,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085487547] [2020-11-07 06:44:45,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:01,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:45:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:45:01,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085487547] [2020-11-07 06:45:01,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:01,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2020-11-07 06:45:01,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685005108] [2020-11-07 06:45:01,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-11-07 06:45:01,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:01,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-11-07 06:45:01,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-11-07 06:45:01,969 INFO L87 Difference]: Start difference. First operand 318 states and 318 transitions. Second operand 122 states. [2020-11-07 06:45:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:45:28,359 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2020-11-07 06:45:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-11-07 06:45:28,362 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 317 [2020-11-07 06:45:28,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:45:28,365 INFO L225 Difference]: With dead ends: 333 [2020-11-07 06:45:28,365 INFO L226 Difference]: Without dead ends: 326 [2020-11-07 06:45:28,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-11-07 06:45:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-11-07 06:45:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 323. [2020-11-07 06:45:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-11-07 06:45:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2020-11-07 06:45:28,376 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 317 [2020-11-07 06:45:28,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:45:28,376 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2020-11-07 06:45:28,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-11-07 06:45:28,376 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2020-11-07 06:45:28,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-11-07 06:45:28,378 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:45:28,378 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:45:28,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-11-07 06:45:28,378 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:45:28,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:45:28,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1008335300, now seen corresponding path program 60 times [2020-11-07 06:45:28,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:45:28,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62247443] [2020-11-07 06:45:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:45:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:46,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:45:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:45:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:45:46,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62247443] [2020-11-07 06:45:46,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:46,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2020-11-07 06:45:46,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288334756] [2020-11-07 06:45:46,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 124 states [2020-11-07 06:45:46,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:46,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2020-11-07 06:45:46,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2020-11-07 06:45:46,456 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 124 states. [2020-11-07 06:46:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:46:14,916 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2020-11-07 06:46:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-11-07 06:46:14,919 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 322 [2020-11-07 06:46:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:46:14,921 INFO L225 Difference]: With dead ends: 338 [2020-11-07 06:46:14,922 INFO L226 Difference]: Without dead ends: 331 [2020-11-07 06:46:14,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10799 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=18605, Invalid=40687, Unknown=0, NotChecked=0, Total=59292 [2020-11-07 06:46:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-11-07 06:46:14,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 328. [2020-11-07 06:46:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-11-07 06:46:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2020-11-07 06:46:14,934 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 322 [2020-11-07 06:46:14,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:46:14,935 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2020-11-07 06:46:14,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 124 states. [2020-11-07 06:46:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2020-11-07 06:46:14,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-07 06:46:14,937 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:46:14,937 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:46:14,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-11-07 06:46:14,937 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:46:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:46:14,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1795554380, now seen corresponding path program 61 times [2020-11-07 06:46:14,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:46:14,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520175468] [2020-11-07 06:46:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:46:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:35,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:46:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:46:35,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520175468] [2020-11-07 06:46:35,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:46:35,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2020-11-07 06:46:35,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976410336] [2020-11-07 06:46:35,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-11-07 06:46:35,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:46:35,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-11-07 06:46:35,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3970, Invalid=11780, Unknown=0, NotChecked=0, Total=15750 [2020-11-07 06:46:35,323 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 126 states. [2020-11-07 06:47:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:47:06,140 INFO L93 Difference]: Finished difference Result 343 states and 343 transitions. [2020-11-07 06:47:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2020-11-07 06:47:06,144 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 327 [2020-11-07 06:47:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:47:06,147 INFO L225 Difference]: With dead ends: 343 [2020-11-07 06:47:06,147 INFO L226 Difference]: Without dead ends: 336 [2020-11-07 06:47:06,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11162 ImplicationChecksByTransitivity, 49.1s TimeCoverageRelationStatistics Valid=19220, Invalid=42036, Unknown=0, NotChecked=0, Total=61256 [2020-11-07 06:47:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-11-07 06:47:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 333. [2020-11-07 06:47:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-11-07 06:47:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2020-11-07 06:47:06,158 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 327 [2020-11-07 06:47:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:47:06,159 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2020-11-07 06:47:06,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-11-07 06:47:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2020-11-07 06:47:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-11-07 06:47:06,160 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:47:06,160 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:47:06,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-11-07 06:47:06,161 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:47:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:47:06,161 INFO L82 PathProgramCache]: Analyzing trace with hash -22957764, now seen corresponding path program 62 times [2020-11-07 06:47:06,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:47:06,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25971751] [2020-11-07 06:47:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:47:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:26,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:47:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:47:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:47:26,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25971751] [2020-11-07 06:47:26,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:47:26,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2020-11-07 06:47:26,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007611559] [2020-11-07 06:47:26,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 128 states [2020-11-07 06:47:26,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:47:26,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2020-11-07 06:47:26,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=12159, Unknown=0, NotChecked=0, Total=16256 [2020-11-07 06:47:26,581 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand 128 states. [2020-11-07 06:47:55,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:47:55,207 INFO L93 Difference]: Finished difference Result 348 states and 348 transitions. [2020-11-07 06:47:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2020-11-07 06:47:55,211 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 332 [2020-11-07 06:47:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:47:55,213 INFO L225 Difference]: With dead ends: 348 [2020-11-07 06:47:55,213 INFO L226 Difference]: Without dead ends: 341 [2020-11-07 06:47:55,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11531 ImplicationChecksByTransitivity, 46.1s TimeCoverageRelationStatistics Valid=19845, Invalid=43407, Unknown=0, NotChecked=0, Total=63252 [2020-11-07 06:47:55,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-11-07 06:47:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 338. [2020-11-07 06:47:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-11-07 06:47:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 338 transitions. [2020-11-07 06:47:55,223 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 338 transitions. Word has length 332 [2020-11-07 06:47:55,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:47:55,224 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 338 transitions. [2020-11-07 06:47:55,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 128 states. [2020-11-07 06:47:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 338 transitions. [2020-11-07 06:47:55,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-11-07 06:47:55,226 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:47:55,226 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:47:55,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-11-07 06:47:55,226 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:47:55,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:47:55,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1546569548, now seen corresponding path program 63 times [2020-11-07 06:47:55,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:47:55,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838766753] [2020-11-07 06:47:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:47:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:48:15,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:48:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:48:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:48:15,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838766753] [2020-11-07 06:48:15,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:48:15,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2020-11-07 06:48:15,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94713305] [2020-11-07 06:48:15,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 130 states [2020-11-07 06:48:15,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:48:15,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2020-11-07 06:48:15,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4226, Invalid=12544, Unknown=0, NotChecked=0, Total=16770 [2020-11-07 06:48:15,361 INFO L87 Difference]: Start difference. First operand 338 states and 338 transitions. Second operand 130 states. [2020-11-07 06:48:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:48:46,385 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2020-11-07 06:48:46,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2020-11-07 06:48:46,388 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 337 [2020-11-07 06:48:46,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:48:46,391 INFO L225 Difference]: With dead ends: 353 [2020-11-07 06:48:46,391 INFO L226 Difference]: Without dead ends: 346 [2020-11-07 06:48:46,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11906 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=20480, Invalid=44800, Unknown=0, NotChecked=0, Total=65280 [2020-11-07 06:48:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-11-07 06:48:46,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2020-11-07 06:48:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-11-07 06:48:46,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2020-11-07 06:48:46,413 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 337 [2020-11-07 06:48:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:48:46,414 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2020-11-07 06:48:46,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 130 states. [2020-11-07 06:48:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2020-11-07 06:48:46,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-11-07 06:48:46,416 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:48:46,416 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:48:46,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-11-07 06:48:46,416 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:48:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:48:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash 251894844, now seen corresponding path program 64 times [2020-11-07 06:48:46,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:48:46,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656504204] [2020-11-07 06:48:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:48:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat