/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/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:02:38,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:02:38,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:02:39,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:02:39,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:02:39,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:02:39,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:02:39,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:02:39,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:02:39,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:02:39,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:02:39,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:02:39,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:02:39,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:02:39,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:02:39,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:02:39,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:02:39,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:02:39,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:02:39,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:02:39,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:02:39,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:02:39,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:02:39,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:02:39,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:02:39,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:02:39,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:02:39,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:02:39,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:02:39,045 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:02:39,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:02:39,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:02:39,047 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:02:39,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:02:39,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:02:39,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:02:39,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:02:39,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:02:39,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:02:39,049 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:02:39,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:02:39,049 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:02:39,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:02:39,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:02:39,050 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:02:39,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:02:39,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:02:39,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:02:39,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:02:39,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:02:39,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:02:39,051 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:02:39,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:02:39,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:02:39,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:02:39,387 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:02:39,387 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:02:39,388 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-07 13:02:39,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead3d022f/e02d7f5c0c984fdaa76e6f1001882cf8/FLAG7ddf7c6d3 [2020-07-07 13:02:39,946 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:02:39,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-07 13:02:39,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead3d022f/e02d7f5c0c984fdaa76e6f1001882cf8/FLAG7ddf7c6d3 [2020-07-07 13:02:40,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead3d022f/e02d7f5c0c984fdaa76e6f1001882cf8 [2020-07-07 13:02:40,276 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:02:40,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:02:40,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:02:40,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:02:40,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:02:40,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:02:40" (1/1) ... [2020-07-07 13:02:40,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e298f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:40, skipping insertion in model container [2020-07-07 13:02:40,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:02:40" (1/1) ... [2020-07-07 13:02:40,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:02:40,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:02:40,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:02:40,539 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:02:40,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:02:40,686 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:02:40,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:40 WrapperNode [2020-07-07 13:02:40,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:02:40,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:02:40,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:02:40,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:02:40,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:40" (1/1) ... [2020-07-07 13:02:40,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:40" (1/1) ... [2020-07-07 13:02:40,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:40" (1/1) ... [2020-07-07 13:02:40,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:40" (1/1) ... [2020-07-07 13:02:40,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:40" (1/1) ... [2020-07-07 13:02:40,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:40" (1/1) ... [2020-07-07 13:02:40,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:40" (1/1) ... [2020-07-07 13:02:40,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:02:40,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:02:40,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:02:40,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:02:40,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:40" (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 [2020-07-07 13:02:40,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:02:40,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:02:40,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:02:40,810 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-07 13:02:40,810 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-07 13:02:40,811 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-07 13:02:40,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:02:40,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:02:40,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 13:02:40,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-07 13:02:40,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:02:40,812 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-07 13:02:40,812 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-07 13:02:40,812 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-07 13:02:40,812 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:02:40,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:02:40,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:02:41,306 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:02:41,306 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 13:02:41,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:02:41 BoogieIcfgContainer [2020-07-07 13:02:41,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:02:41,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:02:41,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:02:41,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:02:41,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:02:40" (1/3) ... [2020-07-07 13:02:41,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656e50e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:02:41, skipping insertion in model container [2020-07-07 13:02:41,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:40" (2/3) ... [2020-07-07 13:02:41,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656e50e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:02:41, skipping insertion in model container [2020-07-07 13:02:41,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:02:41" (3/3) ... [2020-07-07 13:02:41,321 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-07-07 13:02:41,332 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:02:41,340 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:02:41,355 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:02:41,376 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:02:41,377 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:02:41,377 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:02:41,377 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:02:41,377 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:02:41,378 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:02:41,378 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:02:41,378 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:02:41,397 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-07-07 13:02:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-07 13:02:41,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:41,415 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:41,416 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:41,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:41,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2062280112, now seen corresponding path program 1 times [2020-07-07 13:02:41,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:41,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999137757] [2020-07-07 13:02:41,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-07 13:02:41,918 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:41,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999137757] [2020-07-07 13:02:41,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:41,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:02:41,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616043921] [2020-07-07 13:02:41,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:02:41,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:41,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:02:41,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:02:41,946 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 4 states. [2020-07-07 13:02:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:42,120 INFO L93 Difference]: Finished difference Result 286 states and 363 transitions. [2020-07-07 13:02:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:02:42,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-07-07 13:02:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:42,139 INFO L225 Difference]: With dead ends: 286 [2020-07-07 13:02:42,139 INFO L226 Difference]: Without dead ends: 168 [2020-07-07 13:02:42,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:02:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-07 13:02:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 145. [2020-07-07 13:02:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-07 13:02:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 169 transitions. [2020-07-07 13:02:42,225 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 169 transitions. Word has length 100 [2020-07-07 13:02:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:42,226 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 169 transitions. [2020-07-07 13:02:42,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:02:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 169 transitions. [2020-07-07 13:02:42,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-07 13:02:42,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:42,232 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:42,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:02:42,233 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:42,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1947593625, now seen corresponding path program 1 times [2020-07-07 13:02:42,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:42,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208075517] [2020-07-07 13:02:42,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 13:02:42,411 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:42,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208075517] [2020-07-07 13:02:42,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:42,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:02:42,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473906569] [2020-07-07 13:02:42,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:02:42,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:42,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:02:42,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:02:42,416 INFO L87 Difference]: Start difference. First operand 145 states and 169 transitions. Second operand 4 states. [2020-07-07 13:02:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:42,511 INFO L93 Difference]: Finished difference Result 278 states and 331 transitions. [2020-07-07 13:02:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:02:42,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-07-07 13:02:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:42,515 INFO L225 Difference]: With dead ends: 278 [2020-07-07 13:02:42,515 INFO L226 Difference]: Without dead ends: 169 [2020-07-07 13:02:42,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:02:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-07 13:02:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2020-07-07 13:02:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-07 13:02:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2020-07-07 13:02:42,540 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 103 [2020-07-07 13:02:42,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:42,540 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2020-07-07 13:02:42,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:02:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2020-07-07 13:02:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-07 13:02:42,543 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:42,544 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:42,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:02:42,544 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1622356113, now seen corresponding path program 1 times [2020-07-07 13:02:42,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:42,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852617986] [2020-07-07 13:02:42,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 13:02:42,726 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:42,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852617986] [2020-07-07 13:02:42,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:42,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:02:42,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022471100] [2020-07-07 13:02:42,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:02:42,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:42,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:02:42,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:02:42,738 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand 5 states. [2020-07-07 13:02:42,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:42,860 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-07-07 13:02:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:02:42,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-07-07 13:02:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:42,865 INFO L225 Difference]: With dead ends: 314 [2020-07-07 13:02:42,866 INFO L226 Difference]: Without dead ends: 192 [2020-07-07 13:02:42,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:02:42,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-07 13:02:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2020-07-07 13:02:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-07 13:02:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2020-07-07 13:02:42,890 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 108 [2020-07-07 13:02:42,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:42,890 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2020-07-07 13:02:42,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:02:42,891 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2020-07-07 13:02:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-07 13:02:42,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:42,893 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:42,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:02:42,893 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:42,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:42,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1409900093, now seen corresponding path program 1 times [2020-07-07 13:02:42,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:42,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959511251] [2020-07-07 13:02:42,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-07 13:02:43,019 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:43,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959511251] [2020-07-07 13:02:43,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:43,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:02:43,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348431742] [2020-07-07 13:02:43,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:02:43,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:43,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:02:43,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:02:43,023 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand 3 states. [2020-07-07 13:02:43,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:43,042 INFO L93 Difference]: Finished difference Result 188 states and 221 transitions. [2020-07-07 13:02:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:02:43,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-07-07 13:02:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:43,045 INFO L225 Difference]: With dead ends: 188 [2020-07-07 13:02:43,045 INFO L226 Difference]: Without dead ends: 172 [2020-07-07 13:02:43,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:02:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-07 13:02:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-07-07 13:02:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-07 13:02:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2020-07-07 13:02:43,069 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 108 [2020-07-07 13:02:43,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:43,070 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2020-07-07 13:02:43,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:02:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2020-07-07 13:02:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-07 13:02:43,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:43,072 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:43,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:02:43,073 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:43,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2123404618, now seen corresponding path program 1 times [2020-07-07 13:02:43,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:43,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761259352] [2020-07-07 13:02:43,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-07 13:02:43,196 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:43,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761259352] [2020-07-07 13:02:43,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:43,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:02:43,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611320266] [2020-07-07 13:02:43,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:02:43,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:43,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:02:43,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:02:43,200 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand 4 states. [2020-07-07 13:02:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:43,230 INFO L93 Difference]: Finished difference Result 188 states and 220 transitions. [2020-07-07 13:02:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:02:43,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-07-07 13:02:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:43,234 INFO L225 Difference]: With dead ends: 188 [2020-07-07 13:02:43,234 INFO L226 Difference]: Without dead ends: 171 [2020-07-07 13:02:43,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:02:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-07 13:02:43,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-07-07 13:02:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-07 13:02:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2020-07-07 13:02:43,253 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 110 [2020-07-07 13:02:43,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:43,254 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2020-07-07 13:02:43,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:02:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2020-07-07 13:02:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-07 13:02:43,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:43,256 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:43,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:02:43,256 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash -856467222, now seen corresponding path program 1 times [2020-07-07 13:02:43,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:43,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984739335] [2020-07-07 13:02:43,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 13:02:43,391 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:43,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984739335] [2020-07-07 13:02:43,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:43,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:02:43,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256176404] [2020-07-07 13:02:43,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:02:43,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:43,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:02:43,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:02:43,394 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand 5 states. [2020-07-07 13:02:43,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:43,488 INFO L93 Difference]: Finished difference Result 310 states and 367 transitions. [2020-07-07 13:02:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:02:43,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2020-07-07 13:02:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:43,491 INFO L225 Difference]: With dead ends: 310 [2020-07-07 13:02:43,491 INFO L226 Difference]: Without dead ends: 192 [2020-07-07 13:02:43,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:02:43,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-07 13:02:43,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 174. [2020-07-07 13:02:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-07 13:02:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 203 transitions. [2020-07-07 13:02:43,510 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 203 transitions. Word has length 110 [2020-07-07 13:02:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:43,510 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 203 transitions. [2020-07-07 13:02:43,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:02:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 203 transitions. [2020-07-07 13:02:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-07 13:02:43,514 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:43,514 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:43,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:02:43,514 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:43,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:43,515 INFO L82 PathProgramCache]: Analyzing trace with hash -812048320, now seen corresponding path program 1 times [2020-07-07 13:02:43,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:43,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899719158] [2020-07-07 13:02:43,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 13:02:45,719 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:45,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899719158] [2020-07-07 13:02:45,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:45,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:02:45,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357055459] [2020-07-07 13:02:45,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:02:45,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:45,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:02:45,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:02:45,722 INFO L87 Difference]: Start difference. First operand 174 states and 203 transitions. Second operand 6 states. [2020-07-07 13:02:45,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:45,854 INFO L93 Difference]: Finished difference Result 344 states and 408 transitions. [2020-07-07 13:02:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:02:45,855 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-07-07 13:02:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:45,857 INFO L225 Difference]: With dead ends: 344 [2020-07-07 13:02:45,857 INFO L226 Difference]: Without dead ends: 216 [2020-07-07 13:02:45,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:02:45,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-07 13:02:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2020-07-07 13:02:45,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-07 13:02:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 216 transitions. [2020-07-07 13:02:45,895 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 216 transitions. Word has length 115 [2020-07-07 13:02:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:45,895 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 216 transitions. [2020-07-07 13:02:45,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:02:45,896 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 216 transitions. [2020-07-07 13:02:45,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-07 13:02:45,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:45,898 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:45,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:02:45,899 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:45,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:45,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1472531698, now seen corresponding path program 1 times [2020-07-07 13:02:45,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:45,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683182248] [2020-07-07 13:02:45,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 13:02:46,097 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:46,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683182248] [2020-07-07 13:02:46,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:46,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:02:46,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973819156] [2020-07-07 13:02:46,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:02:46,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:46,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:02:46,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:02:46,100 INFO L87 Difference]: Start difference. First operand 184 states and 216 transitions. Second operand 6 states. [2020-07-07 13:02:46,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:46,222 INFO L93 Difference]: Finished difference Result 338 states and 402 transitions. [2020-07-07 13:02:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:02:46,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-07-07 13:02:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:46,227 INFO L225 Difference]: With dead ends: 338 [2020-07-07 13:02:46,227 INFO L226 Difference]: Without dead ends: 212 [2020-07-07 13:02:46,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:02:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-07 13:02:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 184. [2020-07-07 13:02:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-07 13:02:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 216 transitions. [2020-07-07 13:02:46,255 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 216 transitions. Word has length 115 [2020-07-07 13:02:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:46,256 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 216 transitions. [2020-07-07 13:02:46,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:02:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 216 transitions. [2020-07-07 13:02:46,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-07 13:02:46,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:46,262 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:46,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 13:02:46,263 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:46,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:46,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1788956360, now seen corresponding path program 2 times [2020-07-07 13:02:46,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:46,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022871943] [2020-07-07 13:02:46,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 13:02:46,391 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:46,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022871943] [2020-07-07 13:02:46,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:46,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:02:46,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092231000] [2020-07-07 13:02:46,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:02:46,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:46,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:02:46,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:02:46,398 INFO L87 Difference]: Start difference. First operand 184 states and 216 transitions. Second operand 7 states. [2020-07-07 13:02:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:46,525 INFO L93 Difference]: Finished difference Result 371 states and 441 transitions. [2020-07-07 13:02:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:02:46,525 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2020-07-07 13:02:46,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:46,527 INFO L225 Difference]: With dead ends: 371 [2020-07-07 13:02:46,527 INFO L226 Difference]: Without dead ends: 238 [2020-07-07 13:02:46,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:02:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-07 13:02:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 194. [2020-07-07 13:02:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-07 13:02:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 229 transitions. [2020-07-07 13:02:46,556 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 229 transitions. Word has length 120 [2020-07-07 13:02:46,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:46,557 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 229 transitions. [2020-07-07 13:02:46,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:02:46,557 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 229 transitions. [2020-07-07 13:02:46,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-07 13:02:46,559 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:46,559 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:46,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 13:02:46,559 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:46,560 INFO L82 PathProgramCache]: Analyzing trace with hash 495623658, now seen corresponding path program 2 times [2020-07-07 13:02:46,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:46,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065483048] [2020-07-07 13:02:46,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 13:02:46,721 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:46,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065483048] [2020-07-07 13:02:46,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:46,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:02:46,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133779074] [2020-07-07 13:02:46,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:02:46,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:46,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:02:46,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:02:46,724 INFO L87 Difference]: Start difference. First operand 194 states and 229 transitions. Second operand 7 states. [2020-07-07 13:02:46,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:46,931 INFO L93 Difference]: Finished difference Result 357 states and 427 transitions. [2020-07-07 13:02:46,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:02:46,932 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2020-07-07 13:02:46,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:46,934 INFO L225 Difference]: With dead ends: 357 [2020-07-07 13:02:46,934 INFO L226 Difference]: Without dead ends: 226 [2020-07-07 13:02:46,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:02:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-07 13:02:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 194. [2020-07-07 13:02:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-07 13:02:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 229 transitions. [2020-07-07 13:02:47,008 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 229 transitions. Word has length 120 [2020-07-07 13:02:47,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:47,009 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 229 transitions. [2020-07-07 13:02:47,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:02:47,009 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 229 transitions. [2020-07-07 13:02:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-07 13:02:47,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:47,011 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:47,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 13:02:47,011 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash 63241024, now seen corresponding path program 3 times [2020-07-07 13:02:47,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:47,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465628813] [2020-07-07 13:02:47,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 13:02:47,133 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:47,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465628813] [2020-07-07 13:02:47,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:47,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:02:47,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188535755] [2020-07-07 13:02:47,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:02:47,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:47,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:02:47,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:02:47,135 INFO L87 Difference]: Start difference. First operand 194 states and 229 transitions. Second operand 8 states. [2020-07-07 13:02:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:47,698 INFO L93 Difference]: Finished difference Result 398 states and 474 transitions. [2020-07-07 13:02:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 13:02:47,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 125 [2020-07-07 13:02:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:47,701 INFO L225 Difference]: With dead ends: 398 [2020-07-07 13:02:47,702 INFO L226 Difference]: Without dead ends: 260 [2020-07-07 13:02:47,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:02:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-07 13:02:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 204. [2020-07-07 13:02:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-07 13:02:48,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 242 transitions. [2020-07-07 13:02:48,031 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 242 transitions. Word has length 125 [2020-07-07 13:02:48,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:48,032 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 242 transitions. [2020-07-07 13:02:48,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:02:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 242 transitions. [2020-07-07 13:02:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-07 13:02:48,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:48,034 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:48,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 13:02:48,035 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:48,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:48,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1947146254, now seen corresponding path program 3 times [2020-07-07 13:02:48,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:48,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129396759] [2020-07-07 13:02:48,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 13:02:50,408 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:50,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129396759] [2020-07-07 13:02:50,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:50,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:02:50,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894573869] [2020-07-07 13:02:50,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:02:50,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:50,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:02:50,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:02:50,410 INFO L87 Difference]: Start difference. First operand 204 states and 242 transitions. Second operand 8 states. [2020-07-07 13:02:53,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:53,767 INFO L93 Difference]: Finished difference Result 376 states and 452 transitions. [2020-07-07 13:02:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 13:02:53,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 125 [2020-07-07 13:02:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:53,770 INFO L225 Difference]: With dead ends: 376 [2020-07-07 13:02:53,770 INFO L226 Difference]: Without dead ends: 240 [2020-07-07 13:02:53,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:02:53,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-07 13:02:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 204. [2020-07-07 13:02:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-07 13:02:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 242 transitions. [2020-07-07 13:02:55,676 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 242 transitions. Word has length 125 [2020-07-07 13:02:55,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:55,676 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 242 transitions. [2020-07-07 13:02:55,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:02:55,676 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 242 transitions. [2020-07-07 13:02:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-07 13:02:55,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:55,678 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:02:55,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 13:02:55,679 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:55,679 INFO L82 PathProgramCache]: Analyzing trace with hash -110905800, now seen corresponding path program 4 times [2020-07-07 13:02:55,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:55,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898705333] [2020-07-07 13:02:55,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 13:02:55,845 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:55,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898705333] [2020-07-07 13:02:55,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:55,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 13:02:55,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159830390] [2020-07-07 13:02:55,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 13:02:55,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:55,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 13:02:55,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:02:55,847 INFO L87 Difference]: Start difference. First operand 204 states and 242 transitions. Second operand 9 states. [2020-07-07 13:03:14,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:03:14,595 INFO L93 Difference]: Finished difference Result 425 states and 507 transitions. [2020-07-07 13:03:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 13:03:14,595 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-07-07 13:03:14,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:03:14,597 INFO L225 Difference]: With dead ends: 425 [2020-07-07 13:03:14,598 INFO L226 Difference]: Without dead ends: 282 [2020-07-07 13:03:14,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:03:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-07-07 13:03:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 214. [2020-07-07 13:03:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-07 13:03:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 255 transitions. [2020-07-07 13:03:29,591 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 255 transitions. Word has length 130 [2020-07-07 13:03:29,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:03:29,592 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 255 transitions. [2020-07-07 13:03:29,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 13:03:29,592 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 255 transitions. [2020-07-07 13:03:29,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-07 13:03:29,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:03:29,594 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:03:29,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 13:03:29,594 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:03:29,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:03:29,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2121293078, now seen corresponding path program 4 times [2020-07-07 13:03:29,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:03:29,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54292611] [2020-07-07 13:03:29,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:03:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:03:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 13:03:29,849 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:03:29,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54292611] [2020-07-07 13:03:29,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:03:29,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 13:03:29,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637516823] [2020-07-07 13:03:29,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 13:03:29,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:03:29,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 13:03:29,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:03:29,853 INFO L87 Difference]: Start difference. First operand 214 states and 255 transitions. Second operand 9 states. [2020-07-07 13:07:24,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:07:24,017 INFO L93 Difference]: Finished difference Result 395 states and 477 transitions. [2020-07-07 13:07:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 13:07:24,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-07-07 13:07:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:07:24,021 INFO L225 Difference]: With dead ends: 395 [2020-07-07 13:07:24,021 INFO L226 Difference]: Without dead ends: 254 [2020-07-07 13:07:24,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:07:24,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states.