/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 14:54:59,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 14:54:59,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 14:54:59,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 14:54:59,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 14:54:59,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 14:54:59,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 14:54:59,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 14:54:59,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 14:54:59,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 14:54:59,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 14:54:59,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 14:54:59,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 14:54:59,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 14:54:59,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 14:54:59,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 14:54:59,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 14:54:59,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 14:54:59,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 14:54:59,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 14:54:59,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 14:54:59,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 14:54:59,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 14:54:59,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 14:54:59,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 14:54:59,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 14:54:59,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 14:54:59,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 14:54:59,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 14:54:59,789 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 14:54:59,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 14:54:59,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 14:54:59,792 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 14:54:59,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 14:54:59,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 14:54:59,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 14:54:59,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 14:54:59,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 14:54:59,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 14:54:59,796 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 14:54:59,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 14:54:59,796 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 14:54:59,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 14:54:59,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 14:54:59,797 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 14:54:59,797 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 14:54:59,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 14:54:59,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 14:54:59,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 14:54:59,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 14:54:59,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 14:54:59,798 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 14:55:00,178 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 14:55:00,197 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 14:55:00,203 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 14:55:00,205 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 14:55:00,206 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 14:55:00,207 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-07-17 14:55:00,326 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b277f0d/f96b30f1b915485486345c7d63d9791c/FLAG0f0ea80f5 [2020-07-17 14:55:01,019 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 14:55:01,020 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-07-17 14:55:01,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b277f0d/f96b30f1b915485486345c7d63d9791c/FLAG0f0ea80f5 [2020-07-17 14:55:01,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b277f0d/f96b30f1b915485486345c7d63d9791c [2020-07-17 14:55:01,300 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 14:55:01,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 14:55:01,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 14:55:01,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 14:55:01,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 14:55:01,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:55:01" (1/1) ... [2020-07-17 14:55:01,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b0ad5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:55:01, skipping insertion in model container [2020-07-17 14:55:01,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:55:01" (1/1) ... [2020-07-17 14:55:01,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 14:55:01,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 14:55:01,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:55:01,607 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 14:55:01,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:55:01,658 INFO L208 MainTranslator]: Completed translation [2020-07-17 14:55:01,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:55:01 WrapperNode [2020-07-17 14:55:01,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 14:55:01,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 14:55:01,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 14:55:01,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 14:55:01,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:55:01" (1/1) ... [2020-07-17 14:55:01,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:55:01" (1/1) ... [2020-07-17 14:55:01,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:55:01" (1/1) ... [2020-07-17 14:55:01,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:55:01" (1/1) ... [2020-07-17 14:55:01,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:55:01" (1/1) ... [2020-07-17 14:55:01,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:55:01" (1/1) ... [2020-07-17 14:55:01,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:55:01" (1/1) ... [2020-07-17 14:55:01,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 14:55:01,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 14:55:01,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 14:55:01,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 14:55:01,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:55:01" (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 [2020-07-17 14:55:01,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 14:55:01,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 14:55:01,930 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 14:55:01,930 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 14:55:01,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 14:55:01,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 14:55:01,931 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 14:55:01,931 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 14:55:01,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 14:55:01,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 14:55:01,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 14:55:01,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 14:55:01,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 14:55:02,450 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 14:55:02,454 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-17 14:55:02,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:55:02 BoogieIcfgContainer [2020-07-17 14:55:02,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 14:55:02,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 14:55:02,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 14:55:02,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 14:55:02,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 02:55:01" (1/3) ... [2020-07-17 14:55:02,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584972ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:55:02, skipping insertion in model container [2020-07-17 14:55:02,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:55:01" (2/3) ... [2020-07-17 14:55:02,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584972ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:55:02, skipping insertion in model container [2020-07-17 14:55:02,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:55:02" (3/3) ... [2020-07-17 14:55:02,487 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2020-07-17 14:55:02,504 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 14:55:02,513 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 14:55:02,528 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 14:55:02,555 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 14:55:02,556 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 14:55:02,556 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 14:55:02,556 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 14:55:02,556 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 14:55:02,557 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 14:55:02,557 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 14:55:02,557 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 14:55:02,577 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-07-17 14:55:02,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-17 14:55:02,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:02,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:02,594 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:02,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:02,602 INFO L82 PathProgramCache]: Analyzing trace with hash -537390573, now seen corresponding path program 1 times [2020-07-17 14:55:02,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:02,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905488969] [2020-07-17 14:55:02,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:02,796 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:02,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905488969] [2020-07-17 14:55:02,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:02,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 14:55:02,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165135819] [2020-07-17 14:55:02,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 14:55:02,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:02,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 14:55:02,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 14:55:02,837 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 2 states. [2020-07-17 14:55:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:02,941 INFO L93 Difference]: Finished difference Result 134 states and 203 transitions. [2020-07-17 14:55:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 14:55:02,944 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-07-17 14:55:02,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:02,963 INFO L225 Difference]: With dead ends: 134 [2020-07-17 14:55:02,963 INFO L226 Difference]: Without dead ends: 69 [2020-07-17 14:55:02,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 14:55:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-17 14:55:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-17 14:55:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-17 14:55:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-07-17 14:55:03,045 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 19 [2020-07-17 14:55:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:03,046 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-07-17 14:55:03,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 14:55:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-07-17 14:55:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 14:55:03,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:03,048 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] [2020-07-17 14:55:03,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 14:55:03,049 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash 471335344, now seen corresponding path program 1 times [2020-07-17 14:55:03,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:03,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27819146] [2020-07-17 14:55:03,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:03,322 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:03,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27819146] [2020-07-17 14:55:03,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:03,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 14:55:03,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198070494] [2020-07-17 14:55:03,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 14:55:03,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:03,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 14:55:03,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 14:55:03,334 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 5 states. [2020-07-17 14:55:03,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:03,649 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2020-07-17 14:55:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 14:55:03,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-17 14:55:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:03,653 INFO L225 Difference]: With dead ends: 91 [2020-07-17 14:55:03,654 INFO L226 Difference]: Without dead ends: 89 [2020-07-17 14:55:03,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 14:55:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-17 14:55:03,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-07-17 14:55:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-17 14:55:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2020-07-17 14:55:03,703 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 20 [2020-07-17 14:55:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:03,704 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2020-07-17 14:55:03,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 14:55:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2020-07-17 14:55:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 14:55:03,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:03,706 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:03,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 14:55:03,707 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:03,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1383579147, now seen corresponding path program 1 times [2020-07-17 14:55:03,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:03,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957320211] [2020-07-17 14:55:03,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:03,872 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:03,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957320211] [2020-07-17 14:55:03,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:03,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 14:55:03,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510122331] [2020-07-17 14:55:03,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 14:55:03,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:03,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 14:55:03,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 14:55:03,878 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand 5 states. [2020-07-17 14:55:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:04,033 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2020-07-17 14:55:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 14:55:04,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-07-17 14:55:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:04,040 INFO L225 Difference]: With dead ends: 88 [2020-07-17 14:55:04,041 INFO L226 Difference]: Without dead ends: 78 [2020-07-17 14:55:04,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 14:55:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-17 14:55:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-17 14:55:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-17 14:55:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2020-07-17 14:55:04,062 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 25 [2020-07-17 14:55:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:04,063 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2020-07-17 14:55:04,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 14:55:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2020-07-17 14:55:04,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 14:55:04,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:04,065 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:04,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 14:55:04,066 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:04,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:04,067 INFO L82 PathProgramCache]: Analyzing trace with hash 344115466, now seen corresponding path program 1 times [2020-07-17 14:55:04,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:04,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850604009] [2020-07-17 14:55:04,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:04,250 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:04,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850604009] [2020-07-17 14:55:04,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:04,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 14:55:04,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345993544] [2020-07-17 14:55:04,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 14:55:04,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:04,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 14:55:04,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 14:55:04,254 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 7 states. [2020-07-17 14:55:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:04,534 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-07-17 14:55:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 14:55:04,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-17 14:55:04,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:04,539 INFO L225 Difference]: With dead ends: 90 [2020-07-17 14:55:04,539 INFO L226 Difference]: Without dead ends: 88 [2020-07-17 14:55:04,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-17 14:55:04,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-17 14:55:04,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-07-17 14:55:04,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-17 14:55:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-07-17 14:55:04,558 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 28 [2020-07-17 14:55:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:04,559 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-07-17 14:55:04,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 14:55:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-07-17 14:55:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-17 14:55:04,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:04,561 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:04,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 14:55:04,562 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1469174755, now seen corresponding path program 1 times [2020-07-17 14:55:04,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:04,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663523340] [2020-07-17 14:55:04,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:04,710 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:04,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663523340] [2020-07-17 14:55:04,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:04,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 14:55:04,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344229504] [2020-07-17 14:55:04,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 14:55:04,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:04,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 14:55:04,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 14:55:04,713 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 7 states. [2020-07-17 14:55:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:04,961 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-07-17 14:55:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 14:55:04,962 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-17 14:55:04,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:04,965 INFO L225 Difference]: With dead ends: 94 [2020-07-17 14:55:04,965 INFO L226 Difference]: Without dead ends: 85 [2020-07-17 14:55:04,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 14:55:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-17 14:55:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-07-17 14:55:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-17 14:55:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2020-07-17 14:55:04,984 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 38 [2020-07-17 14:55:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:04,985 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2020-07-17 14:55:04,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 14:55:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2020-07-17 14:55:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-17 14:55:04,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:04,987 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:04,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 14:55:04,988 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:04,989 INFO L82 PathProgramCache]: Analyzing trace with hash 859677550, now seen corresponding path program 1 times [2020-07-17 14:55:04,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:04,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286176550] [2020-07-17 14:55:04,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:05,192 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:05,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286176550] [2020-07-17 14:55:05,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:05,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 14:55:05,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916935549] [2020-07-17 14:55:05,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 14:55:05,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:05,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 14:55:05,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 14:55:05,195 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 7 states. [2020-07-17 14:55:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:05,407 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-07-17 14:55:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 14:55:05,407 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-07-17 14:55:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:05,414 INFO L225 Difference]: With dead ends: 91 [2020-07-17 14:55:05,415 INFO L226 Difference]: Without dead ends: 89 [2020-07-17 14:55:05,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 14:55:05,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-17 14:55:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-07-17 14:55:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-17 14:55:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2020-07-17 14:55:05,464 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 41 [2020-07-17 14:55:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:05,465 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2020-07-17 14:55:05,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 14:55:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2020-07-17 14:55:05,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-17 14:55:05,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:05,476 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:05,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 14:55:05,478 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:05,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:05,478 INFO L82 PathProgramCache]: Analyzing trace with hash -943144682, now seen corresponding path program 1 times [2020-07-17 14:55:05,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:05,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955787700] [2020-07-17 14:55:05,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:05,621 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:05,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955787700] [2020-07-17 14:55:05,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:05,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 14:55:05,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210459109] [2020-07-17 14:55:05,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 14:55:05,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:05,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 14:55:05,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 14:55:05,625 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 7 states. [2020-07-17 14:55:05,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:05,855 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2020-07-17 14:55:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 14:55:05,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-07-17 14:55:05,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:05,861 INFO L225 Difference]: With dead ends: 120 [2020-07-17 14:55:05,862 INFO L226 Difference]: Without dead ends: 118 [2020-07-17 14:55:05,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 14:55:05,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-17 14:55:05,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2020-07-17 14:55:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-17 14:55:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-07-17 14:55:05,917 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 44 [2020-07-17 14:55:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:05,919 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-07-17 14:55:05,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 14:55:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-07-17 14:55:05,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-17 14:55:05,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:05,928 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:05,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 14:55:05,929 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:05,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1177695863, now seen corresponding path program 2 times [2020-07-17 14:55:05,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:05,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145521780] [2020-07-17 14:55:05,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:06,089 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:06,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145521780] [2020-07-17 14:55:06,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:06,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 14:55:06,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487256651] [2020-07-17 14:55:06,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 14:55:06,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:06,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 14:55:06,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 14:55:06,093 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 8 states. [2020-07-17 14:55:06,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:06,284 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-07-17 14:55:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 14:55:06,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-07-17 14:55:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:06,287 INFO L225 Difference]: With dead ends: 115 [2020-07-17 14:55:06,287 INFO L226 Difference]: Without dead ends: 113 [2020-07-17 14:55:06,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-17 14:55:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-17 14:55:06,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-07-17 14:55:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-17 14:55:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2020-07-17 14:55:06,308 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 46 [2020-07-17 14:55:06,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:06,309 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2020-07-17 14:55:06,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 14:55:06,309 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2020-07-17 14:55:06,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-17 14:55:06,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:06,311 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:06,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 14:55:06,312 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:06,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:06,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1826770767, now seen corresponding path program 1 times [2020-07-17 14:55:06,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:06,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463756121] [2020-07-17 14:55:06,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:06,441 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:06,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463756121] [2020-07-17 14:55:06,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:06,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 14:55:06,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544207752] [2020-07-17 14:55:06,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 14:55:06,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:06,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 14:55:06,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 14:55:06,444 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand 8 states. [2020-07-17 14:55:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:06,702 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2020-07-17 14:55:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 14:55:06,702 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-07-17 14:55:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:06,705 INFO L225 Difference]: With dead ends: 128 [2020-07-17 14:55:06,705 INFO L226 Difference]: Without dead ends: 123 [2020-07-17 14:55:06,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-17 14:55:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-17 14:55:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-07-17 14:55:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-17 14:55:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2020-07-17 14:55:06,722 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 49 [2020-07-17 14:55:06,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:06,723 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2020-07-17 14:55:06,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 14:55:06,723 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2020-07-17 14:55:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-17 14:55:06,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:06,725 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:06,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 14:55:06,725 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:06,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1519048418, now seen corresponding path program 1 times [2020-07-17 14:55:06,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:06,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223852916] [2020-07-17 14:55:06,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:06,836 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:06,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223852916] [2020-07-17 14:55:06,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:06,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 14:55:06,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026987993] [2020-07-17 14:55:06,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 14:55:06,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 14:55:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 14:55:06,838 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand 9 states. [2020-07-17 14:55:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:07,119 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2020-07-17 14:55:07,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 14:55:07,120 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-07-17 14:55:07,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:07,122 INFO L225 Difference]: With dead ends: 135 [2020-07-17 14:55:07,123 INFO L226 Difference]: Without dead ends: 133 [2020-07-17 14:55:07,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-17 14:55:07,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-17 14:55:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2020-07-17 14:55:07,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-17 14:55:07,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2020-07-17 14:55:07,144 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 58 [2020-07-17 14:55:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:07,145 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2020-07-17 14:55:07,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 14:55:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2020-07-17 14:55:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-17 14:55:07,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:07,148 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:07,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 14:55:07,148 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:07,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1733407875, now seen corresponding path program 1 times [2020-07-17 14:55:07,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:07,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265821340] [2020-07-17 14:55:07,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:07,362 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:07,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265821340] [2020-07-17 14:55:07,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:07,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 14:55:07,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499678017] [2020-07-17 14:55:07,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 14:55:07,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 14:55:07,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 14:55:07,366 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand 9 states. [2020-07-17 14:55:07,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:07,683 INFO L93 Difference]: Finished difference Result 158 states and 182 transitions. [2020-07-17 14:55:07,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 14:55:07,684 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-07-17 14:55:07,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:07,687 INFO L225 Difference]: With dead ends: 158 [2020-07-17 14:55:07,688 INFO L226 Difference]: Without dead ends: 156 [2020-07-17 14:55:07,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-17 14:55:07,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-17 14:55:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2020-07-17 14:55:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-17 14:55:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2020-07-17 14:55:07,710 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 62 [2020-07-17 14:55:07,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:07,711 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2020-07-17 14:55:07,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 14:55:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2020-07-17 14:55:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-17 14:55:07,713 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:07,713 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:07,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 14:55:07,714 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:07,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:07,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1967257859, now seen corresponding path program 1 times [2020-07-17 14:55:07,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:07,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160518517] [2020-07-17 14:55:07,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:07,888 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:07,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160518517] [2020-07-17 14:55:07,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:07,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 14:55:07,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281288651] [2020-07-17 14:55:07,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 14:55:07,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:07,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 14:55:07,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-17 14:55:07,891 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand 9 states. [2020-07-17 14:55:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:08,178 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2020-07-17 14:55:08,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 14:55:08,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-07-17 14:55:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:08,182 INFO L225 Difference]: With dead ends: 158 [2020-07-17 14:55:08,182 INFO L226 Difference]: Without dead ends: 156 [2020-07-17 14:55:08,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-17 14:55:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-17 14:55:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2020-07-17 14:55:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-17 14:55:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 174 transitions. [2020-07-17 14:55:08,204 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 174 transitions. Word has length 63 [2020-07-17 14:55:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:08,205 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 174 transitions. [2020-07-17 14:55:08,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 14:55:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 174 transitions. [2020-07-17 14:55:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-17 14:55:08,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:08,208 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:08,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 14:55:08,208 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:08,209 INFO L82 PathProgramCache]: Analyzing trace with hash -822659134, now seen corresponding path program 1 times [2020-07-17 14:55:08,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:08,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23243047] [2020-07-17 14:55:08,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:08,337 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:08,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23243047] [2020-07-17 14:55:08,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:08,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 14:55:08,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120660027] [2020-07-17 14:55:08,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 14:55:08,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:08,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 14:55:08,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 14:55:08,340 INFO L87 Difference]: Start difference. First operand 152 states and 174 transitions. Second operand 9 states. [2020-07-17 14:55:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:08,622 INFO L93 Difference]: Finished difference Result 187 states and 216 transitions. [2020-07-17 14:55:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 14:55:08,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-07-17 14:55:08,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:08,625 INFO L225 Difference]: With dead ends: 187 [2020-07-17 14:55:08,626 INFO L226 Difference]: Without dead ends: 185 [2020-07-17 14:55:08,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-17 14:55:08,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-07-17 14:55:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 177. [2020-07-17 14:55:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-17 14:55:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 205 transitions. [2020-07-17 14:55:08,649 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 205 transitions. Word has length 65 [2020-07-17 14:55:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:08,650 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 205 transitions. [2020-07-17 14:55:08,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 14:55:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 205 transitions. [2020-07-17 14:55:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-17 14:55:08,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:08,652 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:08,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 14:55:08,653 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:08,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:08,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1510377470, now seen corresponding path program 1 times [2020-07-17 14:55:08,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:08,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491130605] [2020-07-17 14:55:08,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:08,843 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:08,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491130605] [2020-07-17 14:55:08,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:08,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 14:55:08,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258658248] [2020-07-17 14:55:08,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 14:55:08,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:08,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 14:55:08,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-17 14:55:08,846 INFO L87 Difference]: Start difference. First operand 177 states and 205 transitions. Second operand 9 states. [2020-07-17 14:55:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:09,133 INFO L93 Difference]: Finished difference Result 192 states and 221 transitions. [2020-07-17 14:55:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 14:55:09,134 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-07-17 14:55:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:09,137 INFO L225 Difference]: With dead ends: 192 [2020-07-17 14:55:09,137 INFO L226 Difference]: Without dead ends: 187 [2020-07-17 14:55:09,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-17 14:55:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-17 14:55:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2020-07-17 14:55:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-07-17 14:55:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 208 transitions. [2020-07-17 14:55:09,158 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 208 transitions. Word has length 67 [2020-07-17 14:55:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:09,159 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 208 transitions. [2020-07-17 14:55:09,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 14:55:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 208 transitions. [2020-07-17 14:55:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-17 14:55:09,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:09,162 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:09,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 14:55:09,162 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:09,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:09,163 INFO L82 PathProgramCache]: Analyzing trace with hash 869213219, now seen corresponding path program 2 times [2020-07-17 14:55:09,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:09,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383979846] [2020-07-17 14:55:09,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:09,307 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:09,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383979846] [2020-07-17 14:55:09,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:09,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 14:55:09,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022368732] [2020-07-17 14:55:09,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 14:55:09,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:09,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 14:55:09,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-17 14:55:09,309 INFO L87 Difference]: Start difference. First operand 181 states and 208 transitions. Second operand 9 states. [2020-07-17 14:55:09,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:09,613 INFO L93 Difference]: Finished difference Result 193 states and 220 transitions. [2020-07-17 14:55:09,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 14:55:09,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-07-17 14:55:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:09,617 INFO L225 Difference]: With dead ends: 193 [2020-07-17 14:55:09,617 INFO L226 Difference]: Without dead ends: 188 [2020-07-17 14:55:09,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-17 14:55:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-17 14:55:09,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2020-07-17 14:55:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-17 14:55:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2020-07-17 14:55:09,642 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 70 [2020-07-17 14:55:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:09,643 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2020-07-17 14:55:09,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 14:55:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2020-07-17 14:55:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-17 14:55:09,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:09,646 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:09,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 14:55:09,647 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:09,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1269119089, now seen corresponding path program 1 times [2020-07-17 14:55:09,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:09,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90271627] [2020-07-17 14:55:09,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:09,807 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:09,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90271627] [2020-07-17 14:55:09,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:09,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 14:55:09,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452557975] [2020-07-17 14:55:09,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 14:55:09,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:09,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 14:55:09,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-17 14:55:09,810 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand 11 states. [2020-07-17 14:55:10,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:10,131 INFO L93 Difference]: Finished difference Result 202 states and 228 transitions. [2020-07-17 14:55:10,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 14:55:10,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-07-17 14:55:10,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:10,135 INFO L225 Difference]: With dead ends: 202 [2020-07-17 14:55:10,135 INFO L226 Difference]: Without dead ends: 200 [2020-07-17 14:55:10,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-17 14:55:10,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-17 14:55:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 193. [2020-07-17 14:55:10,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-07-17 14:55:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 218 transitions. [2020-07-17 14:55:10,159 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 218 transitions. Word has length 76 [2020-07-17 14:55:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:10,160 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 218 transitions. [2020-07-17 14:55:10,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 14:55:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 218 transitions. [2020-07-17 14:55:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 14:55:10,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:10,162 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:10,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 14:55:10,163 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1147260786, now seen corresponding path program 1 times [2020-07-17 14:55:10,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:10,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763850031] [2020-07-17 14:55:10,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:10,290 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:10,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763850031] [2020-07-17 14:55:10,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:10,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 14:55:10,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086384857] [2020-07-17 14:55:10,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 14:55:10,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:10,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 14:55:10,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-17 14:55:10,293 INFO L87 Difference]: Start difference. First operand 193 states and 218 transitions. Second operand 11 states. [2020-07-17 14:55:10,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:10,706 INFO L93 Difference]: Finished difference Result 234 states and 268 transitions. [2020-07-17 14:55:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 14:55:10,707 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-07-17 14:55:10,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:10,710 INFO L225 Difference]: With dead ends: 234 [2020-07-17 14:55:10,710 INFO L226 Difference]: Without dead ends: 232 [2020-07-17 14:55:10,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-07-17 14:55:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-17 14:55:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 223. [2020-07-17 14:55:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-17 14:55:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 255 transitions. [2020-07-17 14:55:10,744 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 255 transitions. Word has length 79 [2020-07-17 14:55:10,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:10,747 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 255 transitions. [2020-07-17 14:55:10,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 14:55:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 255 transitions. [2020-07-17 14:55:10,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 14:55:10,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:10,749 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:10,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 14:55:10,750 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:10,750 INFO L82 PathProgramCache]: Analyzing trace with hash 341113206, now seen corresponding path program 2 times [2020-07-17 14:55:10,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:10,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764558319] [2020-07-17 14:55:10,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:10,911 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:10,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764558319] [2020-07-17 14:55:10,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:10,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 14:55:10,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853566629] [2020-07-17 14:55:10,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 14:55:10,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:10,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 14:55:10,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-17 14:55:10,920 INFO L87 Difference]: Start difference. First operand 223 states and 255 transitions. Second operand 11 states. [2020-07-17 14:55:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:11,345 INFO L93 Difference]: Finished difference Result 264 states and 305 transitions. [2020-07-17 14:55:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 14:55:11,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-07-17 14:55:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:11,350 INFO L225 Difference]: With dead ends: 264 [2020-07-17 14:55:11,350 INFO L226 Difference]: Without dead ends: 262 [2020-07-17 14:55:11,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-07-17 14:55:11,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-17 14:55:11,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 223. [2020-07-17 14:55:11,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-17 14:55:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 255 transitions. [2020-07-17 14:55:11,381 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 255 transitions. Word has length 79 [2020-07-17 14:55:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:11,382 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 255 transitions. [2020-07-17 14:55:11,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 14:55:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 255 transitions. [2020-07-17 14:55:11,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-17 14:55:11,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:11,386 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:11,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 14:55:11,386 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:11,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:11,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1759613834, now seen corresponding path program 1 times [2020-07-17 14:55:11,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:11,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419474845] [2020-07-17 14:55:11,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:11,602 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:11,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419474845] [2020-07-17 14:55:11,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:11,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-17 14:55:11,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648985808] [2020-07-17 14:55:11,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 14:55:11,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:11,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 14:55:11,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-17 14:55:11,606 INFO L87 Difference]: Start difference. First operand 223 states and 255 transitions. Second operand 10 states. [2020-07-17 14:55:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:11,941 INFO L93 Difference]: Finished difference Result 236 states and 268 transitions. [2020-07-17 14:55:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 14:55:11,942 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-07-17 14:55:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:11,946 INFO L225 Difference]: With dead ends: 236 [2020-07-17 14:55:11,947 INFO L226 Difference]: Without dead ends: 234 [2020-07-17 14:55:11,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-07-17 14:55:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-17 14:55:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2020-07-17 14:55:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-17 14:55:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 260 transitions. [2020-07-17 14:55:11,983 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 260 transitions. Word has length 81 [2020-07-17 14:55:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:11,983 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 260 transitions. [2020-07-17 14:55:11,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 14:55:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 260 transitions. [2020-07-17 14:55:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-17 14:55:11,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:11,986 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:11,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 14:55:11,987 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:11,988 INFO L82 PathProgramCache]: Analyzing trace with hash -343631243, now seen corresponding path program 1 times [2020-07-17 14:55:11,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:11,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156785231] [2020-07-17 14:55:11,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:12,176 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:12,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156785231] [2020-07-17 14:55:12,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:12,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 14:55:12,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203683002] [2020-07-17 14:55:12,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 14:55:12,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:12,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 14:55:12,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-17 14:55:12,181 INFO L87 Difference]: Start difference. First operand 228 states and 260 transitions. Second operand 11 states. [2020-07-17 14:55:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:12,629 INFO L93 Difference]: Finished difference Result 263 states and 302 transitions. [2020-07-17 14:55:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 14:55:12,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-07-17 14:55:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:12,634 INFO L225 Difference]: With dead ends: 263 [2020-07-17 14:55:12,635 INFO L226 Difference]: Without dead ends: 261 [2020-07-17 14:55:12,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-17 14:55:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-07-17 14:55:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 253. [2020-07-17 14:55:12,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-07-17 14:55:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 291 transitions. [2020-07-17 14:55:12,697 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 291 transitions. Word has length 83 [2020-07-17 14:55:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:12,698 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 291 transitions. [2020-07-17 14:55:12,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 14:55:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 291 transitions. [2020-07-17 14:55:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-17 14:55:12,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:12,703 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:12,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 14:55:12,707 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:12,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:12,708 INFO L82 PathProgramCache]: Analyzing trace with hash -857748777, now seen corresponding path program 3 times [2020-07-17 14:55:12,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:12,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114730649] [2020-07-17 14:55:12,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:12,906 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:12,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114730649] [2020-07-17 14:55:12,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:12,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-17 14:55:12,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676919758] [2020-07-17 14:55:12,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 14:55:12,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 14:55:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-17 14:55:12,909 INFO L87 Difference]: Start difference. First operand 253 states and 291 transitions. Second operand 10 states. [2020-07-17 14:55:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:13,257 INFO L93 Difference]: Finished difference Result 262 states and 299 transitions. [2020-07-17 14:55:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 14:55:13,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-07-17 14:55:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:13,260 INFO L225 Difference]: With dead ends: 262 [2020-07-17 14:55:13,260 INFO L226 Difference]: Without dead ends: 152 [2020-07-17 14:55:13,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-07-17 14:55:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-17 14:55:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-07-17 14:55:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-17 14:55:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2020-07-17 14:55:13,275 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 84 [2020-07-17 14:55:13,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:13,275 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2020-07-17 14:55:13,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 14:55:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2020-07-17 14:55:13,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-07-17 14:55:13,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:13,278 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:13,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 14:55:13,278 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:13,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:13,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1405253968, now seen corresponding path program 2 times [2020-07-17 14:55:13,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:13,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231527805] [2020-07-17 14:55:13,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:13,440 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:13,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231527805] [2020-07-17 14:55:13,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:13,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-17 14:55:13,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357765972] [2020-07-17 14:55:13,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 14:55:13,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:13,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 14:55:13,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-17 14:55:13,442 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand 10 states. [2020-07-17 14:55:13,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:13,758 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2020-07-17 14:55:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 14:55:13,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-07-17 14:55:13,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:13,762 INFO L225 Difference]: With dead ends: 160 [2020-07-17 14:55:13,763 INFO L226 Difference]: Without dead ends: 155 [2020-07-17 14:55:13,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-07-17 14:55:13,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-17 14:55:13,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-07-17 14:55:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-17 14:55:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2020-07-17 14:55:13,778 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 88 [2020-07-17 14:55:13,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:13,779 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2020-07-17 14:55:13,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 14:55:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2020-07-17 14:55:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-17 14:55:13,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:13,781 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:13,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 14:55:13,781 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:13,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:13,782 INFO L82 PathProgramCache]: Analyzing trace with hash 813915649, now seen corresponding path program 1 times [2020-07-17 14:55:13,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:13,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178243416] [2020-07-17 14:55:13,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:13,947 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:13,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178243416] [2020-07-17 14:55:13,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:13,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-17 14:55:13,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837595255] [2020-07-17 14:55:13,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 14:55:13,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:13,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 14:55:13,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-07-17 14:55:13,951 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand 13 states. [2020-07-17 14:55:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:14,528 INFO L93 Difference]: Finished difference Result 194 states and 221 transitions. [2020-07-17 14:55:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 14:55:14,529 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-07-17 14:55:14,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:14,531 INFO L225 Difference]: With dead ends: 194 [2020-07-17 14:55:14,531 INFO L226 Difference]: Without dead ends: 192 [2020-07-17 14:55:14,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-07-17 14:55:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-17 14:55:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2020-07-17 14:55:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-17 14:55:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 208 transitions. [2020-07-17 14:55:14,557 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 208 transitions. Word has length 97 [2020-07-17 14:55:14,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:14,558 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 208 transitions. [2020-07-17 14:55:14,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 14:55:14,559 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 208 transitions. [2020-07-17 14:55:14,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-17 14:55:14,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:14,562 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:14,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 14:55:14,562 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:14,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1992677655, now seen corresponding path program 2 times [2020-07-17 14:55:14,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:14,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091324987] [2020-07-17 14:55:14,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:14,798 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:14,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091324987] [2020-07-17 14:55:14,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:14,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-17 14:55:14,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395215983] [2020-07-17 14:55:14,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 14:55:14,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:14,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 14:55:14,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-07-17 14:55:14,802 INFO L87 Difference]: Start difference. First operand 183 states and 208 transitions. Second operand 13 states. [2020-07-17 14:55:15,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:15,386 INFO L93 Difference]: Finished difference Result 198 states and 224 transitions. [2020-07-17 14:55:15,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 14:55:15,387 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-07-17 14:55:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:15,390 INFO L225 Difference]: With dead ends: 198 [2020-07-17 14:55:15,391 INFO L226 Difference]: Without dead ends: 196 [2020-07-17 14:55:15,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-07-17 14:55:15,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-07-17 14:55:15,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 157. [2020-07-17 14:55:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-17 14:55:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2020-07-17 14:55:15,413 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 97 [2020-07-17 14:55:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:15,414 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2020-07-17 14:55:15,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 14:55:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2020-07-17 14:55:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-17 14:55:15,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:55:15,417 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:55:15,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-17 14:55:15,418 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:55:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:55:15,419 INFO L82 PathProgramCache]: Analyzing trace with hash 762056004, now seen corresponding path program 3 times [2020-07-17 14:55:15,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:55:15,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114537612] [2020-07-17 14:55:15,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:55:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:55:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 14:55:15,785 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:55:15,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114537612] [2020-07-17 14:55:15,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:55:15,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 14:55:15,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705279396] [2020-07-17 14:55:15,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 14:55:15,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:55:15,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 14:55:15,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-07-17 14:55:15,790 INFO L87 Difference]: Start difference. First operand 157 states and 174 transitions. Second operand 11 states. [2020-07-17 14:55:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:55:16,277 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2020-07-17 14:55:16,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 14:55:16,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 102 [2020-07-17 14:55:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:55:16,279 INFO L225 Difference]: With dead ends: 157 [2020-07-17 14:55:16,279 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 14:55:16,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-07-17 14:55:16,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 14:55:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 14:55:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 14:55:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 14:55:16,282 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2020-07-17 14:55:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:55:16,283 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 14:55:16,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 14:55:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 14:55:16,283 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 14:55:16,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-17 14:55:16,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 14:55:16,913 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2020-07-17 14:55:18,309 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 14:55:18,310 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-17 14:55:18,310 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-17 14:55:18,310 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 14:55:18,310 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 14:55:18,310 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-17 14:55:18,310 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-07-17 14:55:18,310 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-17 14:55:18,311 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-17 14:55:18,311 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-07-17 14:55:18,311 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-17 14:55:18,311 INFO L264 CegarLoopResult]: At program point L60(line 60) the Hoare annotation is: (and (<= (+ |main_#t~post9| 1) main_~tagbuf_len~0) (<= 1 |main_#t~post9|) (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,311 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,311 INFO L264 CegarLoopResult]: At program point L60-1(line 60) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= (+ |main_#t~post9| 1) main_~tagbuf_len~0) (<= 1 |main_#t~post9|) (<= 2 main_~t~0)) [2020-07-17 14:55:18,312 INFO L264 CegarLoopResult]: At program point L27-1(lines 27 29) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,312 INFO L264 CegarLoopResult]: At program point L27-2(line 27) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,312 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 66) the Hoare annotation is: true [2020-07-17 14:55:18,312 INFO L264 CegarLoopResult]: At program point L27-3(line 27) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,312 INFO L264 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,312 INFO L264 CegarLoopResult]: At program point L44-1(lines 44 53) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,313 INFO L264 CegarLoopResult]: At program point L44-2(line 44) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,313 INFO L264 CegarLoopResult]: At program point L44-4(line 44) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,313 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= (+ |main_#t~post4| 1) main_~tagbuf_len~0) (<= 0 |main_#t~post4|) (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,313 INFO L264 CegarLoopResult]: At program point L36-1(line 36) the Hoare annotation is: (and (<= (+ |main_#t~post4| 1) main_~tagbuf_len~0) (<= 0 |main_#t~post4|) (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,313 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,313 INFO L264 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,314 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-17 14:55:18,314 INFO L264 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,314 INFO L264 CegarLoopResult]: At program point L45-1(line 45) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,314 INFO L264 CegarLoopResult]: At program point L37-2(lines 37 61) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,314 INFO L264 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,315 INFO L264 CegarLoopResult]: At program point L62(line 62) the Hoare annotation is: (and (<= 0 main_~tagbuf_len~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,315 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 33) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-17 14:55:18,315 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 33) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,315 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,315 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 66) the Hoare annotation is: true [2020-07-17 14:55:18,315 INFO L264 CegarLoopResult]: At program point L38(lines 38 42) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,316 INFO L271 CegarLoopResult]: At program point L63(lines 14 66) the Hoare annotation is: true [2020-07-17 14:55:18,316 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,316 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 66) the Hoare annotation is: true [2020-07-17 14:55:18,316 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,316 INFO L264 CegarLoopResult]: At program point L55(line 55) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,317 INFO L264 CegarLoopResult]: At program point L22(lines 22 26) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-17 14:55:18,317 INFO L264 CegarLoopResult]: At program point L55-1(lines 55 57) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,317 INFO L264 CegarLoopResult]: At program point L55-2(line 55) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,317 INFO L264 CegarLoopResult]: At program point L55-3(line 55) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,317 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (and (<= (+ |main_#t~post7| 1) main_~tagbuf_len~0) (<= 1 |main_#t~post7|) (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,317 INFO L264 CegarLoopResult]: At program point L47-1(line 47) the Hoare annotation is: (and (<= (+ |main_#t~post7| 1) main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 1 |main_#t~post7|) (<= 2 main_~t~0)) [2020-07-17 14:55:18,318 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-17 14:55:18,318 INFO L264 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-07-17 14:55:18,318 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,318 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-17 14:55:18,318 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-07-17 14:55:18,318 INFO L264 CegarLoopResult]: At program point L48(lines 48 52) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 2 main_~t~0)) [2020-07-17 14:55:18,319 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (and (<= (+ |main_#t~post3| 1) main_~tagbuf_len~0) (<= 0 |main_#t~post3|) (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,319 INFO L264 CegarLoopResult]: At program point L32-1(line 32) the Hoare annotation is: (and (<= (+ |main_#t~post3| 1) main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 |main_#t~post3|) (<= 1 main_~t~0)) [2020-07-17 14:55:18,319 INFO L264 CegarLoopResult]: At program point L49(line 49) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2020-07-17 14:55:18,319 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-07-17 14:55:18,319 INFO L264 CegarLoopResult]: At program point L49-1(line 49) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-07-17 14:55:18,319 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,320 INFO L271 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: true [2020-07-17 14:55:18,320 INFO L271 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: true [2020-07-17 14:55:18,320 INFO L271 CegarLoopResult]: At program point L17-2(line 17) the Hoare annotation is: true [2020-07-17 14:55:18,320 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,320 INFO L264 CegarLoopResult]: At program point L59(line 59) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,320 INFO L271 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-07-17 14:55:18,320 INFO L264 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (<= 1 main_~tagbuf_len~0) [2020-07-17 14:55:18,321 INFO L264 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,321 INFO L264 CegarLoopResult]: At program point L43-1(lines 43 57) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,321 INFO L264 CegarLoopResult]: At program point L43-2(line 43) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,321 INFO L264 CegarLoopResult]: At program point L43-3(line 43) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,321 INFO L264 CegarLoopResult]: At program point L43-4(lines 43 57) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-07-17 14:55:18,321 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-07-17 14:55:18,322 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-17 14:55:18,322 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-17 14:55:18,322 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-17 14:55:18,322 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-17 14:55:18,322 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-17 14:55:18,322 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-17 14:55:18,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 02:55:18 BoogieIcfgContainer [2020-07-17 14:55:18,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 14:55:18,359 INFO L168 Benchmark]: Toolchain (without parser) took 17056.71 ms. Allocated memory was 136.8 MB in the beginning and 381.2 MB in the end (delta: 244.3 MB). Free memory was 101.0 MB in the beginning and 328.7 MB in the end (delta: -227.7 MB). Peak memory consumption was 227.3 MB. Max. memory is 7.1 GB. [2020-07-17 14:55:18,360 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 136.8 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 14:55:18,360 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.75 ms. Allocated memory is still 136.8 MB. Free memory was 100.5 MB in the beginning and 90.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-17 14:55:18,361 INFO L168 Benchmark]: Boogie Preprocessor took 178.13 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 90.5 MB in the beginning and 180.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-07-17 14:55:18,362 INFO L168 Benchmark]: RCFGBuilder took 628.24 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 161.1 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-07-17 14:55:18,363 INFO L168 Benchmark]: TraceAbstraction took 15886.22 ms. Allocated memory was 201.9 MB in the beginning and 381.2 MB in the end (delta: 179.3 MB). Free memory was 160.5 MB in the beginning and 328.7 MB in the end (delta: -168.2 MB). Peak memory consumption was 221.8 MB. Max. memory is 7.1 GB. [2020-07-17 14:55:18,366 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 136.8 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 353.75 ms. Allocated memory is still 136.8 MB. Free memory was 100.5 MB in the beginning and 90.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 178.13 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 90.5 MB in the beginning and 180.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 628.24 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 161.1 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15886.22 ms. Allocated memory was 201.9 MB in the beginning and 381.2 MB in the end (delta: 179.3 MB). Free memory was 160.5 MB in the beginning and 328.7 MB in the end (delta: -168.2 MB). Peak memory consumption was 221.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: t <= tagbuf_len && 0 <= t - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: t <= tagbuf_len && 1 <= t - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 0 == \old(cond) || !(0 == cond) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.7s, OverallIterations: 25, TraceHistogramMax: 10, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2053 SDtfs, 888 SDslu, 10849 SDs, 0 SdLazy, 3941 SolverSat, 357 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 701 GetRequests, 359 SyntacticMatches, 33 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=253occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 25 MinimizatonAttempts, 193 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 74 LocationsWithAnnotation, 494 PreInvPairs, 814 NumberOfFragments, 537 HoareAnnotationTreeSize, 494 FomulaSimplifications, 529911 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 74 FomulaSimplificationsInter, 1449 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...