/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/systemc/kundu2.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:05:19,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:05:19,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:05:19,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:05:19,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:05:19,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:05:19,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:05:19,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:05:19,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:05:19,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:05:19,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:05:19,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:05:19,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:05:19,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:05:19,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:05:19,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:05:19,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:05:19,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:05:19,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:05:19,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:05:19,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:05:19,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:05:19,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:05:19,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:05:19,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:05:19,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:05:19,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:05:19,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:05:19,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:05:19,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:05:19,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:05:19,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:05:19,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:05:19,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:05:19,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:05:19,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:05:19,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:05:19,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:05:19,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:05:19,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:05:19,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:05:19,356 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:05:19,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:05:19,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:05:19,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:05:19,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:05:19,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:05:19,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:05:19,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:05:19,360 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:05:19,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:05:19,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:05:19,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:05:19,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:05:19,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:05:19,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:05:19,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:05:19,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:05:19,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:05:19,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:05:19,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:05:19,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:05:19,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:05:19,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:05:19,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:05:19,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:05:19,812 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:05:19,813 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:05:19,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/kundu2.cil.c [2020-12-22 07:05:19,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d34fa04b4/8aa0a12f86224428839b8c3fe1d845f0/FLAGdbc4a745a [2020-12-22 07:05:20,599 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:05:20,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/kundu2.cil.c [2020-12-22 07:05:20,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d34fa04b4/8aa0a12f86224428839b8c3fe1d845f0/FLAGdbc4a745a [2020-12-22 07:05:20,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d34fa04b4/8aa0a12f86224428839b8c3fe1d845f0 [2020-12-22 07:05:20,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:05:20,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:05:20,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:05:20,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:05:20,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:05:20,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:20" (1/1) ... [2020-12-22 07:05:20,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78029015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:20, skipping insertion in model container [2020-12-22 07:05:20,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:05:20" (1/1) ... [2020-12-22 07:05:20,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:05:21,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:05:21,177 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/kundu2.cil.c[331,344] [2020-12-22 07:05:21,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:05:21,260 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:05:21,274 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/kundu2.cil.c[331,344] [2020-12-22 07:05:21,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:05:21,370 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:05:21,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:21 WrapperNode [2020-12-22 07:05:21,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:05:21,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:05:21,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:05:21,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:05:21,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:21" (1/1) ... [2020-12-22 07:05:21,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:21" (1/1) ... [2020-12-22 07:05:21,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:05:21,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:05:21,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:05:21,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:05:21,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:21" (1/1) ... [2020-12-22 07:05:21,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:21" (1/1) ... [2020-12-22 07:05:21,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:21" (1/1) ... [2020-12-22 07:05:21,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:21" (1/1) ... [2020-12-22 07:05:21,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:21" (1/1) ... [2020-12-22 07:05:21,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:21" (1/1) ... [2020-12-22 07:05:21,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:21" (1/1) ... [2020-12-22 07:05:21,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:05:21,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:05:21,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:05:21,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:05:21,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:21" (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 [2020-12-22 07:05:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:05:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:05:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:05:21,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:05:22,534 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:05:22,534 INFO L299 CfgBuilder]: Removed 95 assume(true) statements. [2020-12-22 07:05:22,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:22 BoogieIcfgContainer [2020-12-22 07:05:22,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:05:22,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:05:22,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:05:22,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:05:22,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:05:20" (1/3) ... [2020-12-22 07:05:22,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b2cb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:22, skipping insertion in model container [2020-12-22 07:05:22,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:05:21" (2/3) ... [2020-12-22 07:05:22,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b2cb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:05:22, skipping insertion in model container [2020-12-22 07:05:22,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:05:22" (3/3) ... [2020-12-22 07:05:22,547 INFO L111 eAbstractionObserver]: Analyzing ICFG kundu2.cil.c [2020-12-22 07:05:22,555 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:05:22,562 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-22 07:05:22,587 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-22 07:05:22,620 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:05:22,620 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:05:22,620 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:05:22,620 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:05:22,620 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:05:22,621 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:05:22,621 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:05:22,621 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:05:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-12-22 07:05:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:05:22,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:22,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:22,657 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:22,666 INFO L82 PathProgramCache]: Analyzing trace with hash 805260304, now seen corresponding path program 1 times [2020-12-22 07:05:22,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:22,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109124666] [2020-12-22 07:05:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:22,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109124666] [2020-12-22 07:05:22,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:22,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:05:22,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686319199] [2020-12-22 07:05:22,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:05:22,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:05:22,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:22,942 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 3 states. [2020-12-22 07:05:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:23,026 INFO L93 Difference]: Finished difference Result 354 states and 540 transitions. [2020-12-22 07:05:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:05:23,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 07:05:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:23,063 INFO L225 Difference]: With dead ends: 354 [2020-12-22 07:05:23,063 INFO L226 Difference]: Without dead ends: 175 [2020-12-22 07:05:23,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:23,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-22 07:05:23,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-12-22 07:05:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 07:05:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 257 transitions. [2020-12-22 07:05:23,161 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 257 transitions. Word has length 40 [2020-12-22 07:05:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:23,162 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 257 transitions. [2020-12-22 07:05:23,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:05:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 257 transitions. [2020-12-22 07:05:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:05:23,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:23,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:23,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:05:23,165 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:23,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1199627090, now seen corresponding path program 1 times [2020-12-22 07:05:23,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:23,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027678914] [2020-12-22 07:05:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:23,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027678914] [2020-12-22 07:05:23,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:23,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:05:23,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627615795] [2020-12-22 07:05:23,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:05:23,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:23,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:05:23,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:23,282 INFO L87 Difference]: Start difference. First operand 175 states and 257 transitions. Second operand 5 states. [2020-12-22 07:05:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:23,549 INFO L93 Difference]: Finished difference Result 637 states and 936 transitions. [2020-12-22 07:05:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:05:23,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 07:05:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:23,558 INFO L225 Difference]: With dead ends: 637 [2020-12-22 07:05:23,562 INFO L226 Difference]: Without dead ends: 475 [2020-12-22 07:05:23,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:05:23,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-12-22 07:05:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 187. [2020-12-22 07:05:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 07:05:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 269 transitions. [2020-12-22 07:05:23,627 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 269 transitions. Word has length 40 [2020-12-22 07:05:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:23,628 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 269 transitions. [2020-12-22 07:05:23,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:05:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 269 transitions. [2020-12-22 07:05:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:05:23,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:23,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:23,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:05:23,636 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:23,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1709136812, now seen corresponding path program 1 times [2020-12-22 07:05:23,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:23,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637035435] [2020-12-22 07:05:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:23,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637035435] [2020-12-22 07:05:23,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:23,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:05:23,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539469686] [2020-12-22 07:05:23,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:05:23,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:23,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:05:23,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:05:23,807 INFO L87 Difference]: Start difference. First operand 187 states and 269 transitions. Second operand 4 states. [2020-12-22 07:05:23,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:23,975 INFO L93 Difference]: Finished difference Result 653 states and 937 transitions. [2020-12-22 07:05:23,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:05:23,975 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-12-22 07:05:23,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:23,979 INFO L225 Difference]: With dead ends: 653 [2020-12-22 07:05:23,979 INFO L226 Difference]: Without dead ends: 474 [2020-12-22 07:05:23,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:23,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-12-22 07:05:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 418. [2020-12-22 07:05:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-12-22 07:05:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 603 transitions. [2020-12-22 07:05:24,018 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 603 transitions. Word has length 40 [2020-12-22 07:05:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:24,018 INFO L481 AbstractCegarLoop]: Abstraction has 418 states and 603 transitions. [2020-12-22 07:05:24,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:05:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 603 transitions. [2020-12-22 07:05:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:05:24,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:24,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:24,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:05:24,021 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:24,021 INFO L82 PathProgramCache]: Analyzing trace with hash 913312853, now seen corresponding path program 1 times [2020-12-22 07:05:24,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:24,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97555611] [2020-12-22 07:05:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:24,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97555611] [2020-12-22 07:05:24,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:24,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:05:24,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452169256] [2020-12-22 07:05:24,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:05:24,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:24,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:05:24,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:24,082 INFO L87 Difference]: Start difference. First operand 418 states and 603 transitions. Second operand 5 states. [2020-12-22 07:05:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:24,239 INFO L93 Difference]: Finished difference Result 1185 states and 1728 transitions. [2020-12-22 07:05:24,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:05:24,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 07:05:24,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:24,245 INFO L225 Difference]: With dead ends: 1185 [2020-12-22 07:05:24,245 INFO L226 Difference]: Without dead ends: 785 [2020-12-22 07:05:24,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:05:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-12-22 07:05:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 427. [2020-12-22 07:05:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-12-22 07:05:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 607 transitions. [2020-12-22 07:05:24,286 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 607 transitions. Word has length 40 [2020-12-22 07:05:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:24,287 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 607 transitions. [2020-12-22 07:05:24,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:05:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 607 transitions. [2020-12-22 07:05:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:05:24,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:24,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:24,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:05:24,288 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:24,289 INFO L82 PathProgramCache]: Analyzing trace with hash -892125481, now seen corresponding path program 1 times [2020-12-22 07:05:24,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:24,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689556283] [2020-12-22 07:05:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:24,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689556283] [2020-12-22 07:05:24,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:24,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:05:24,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481416102] [2020-12-22 07:05:24,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:05:24,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:24,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:05:24,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:05:24,366 INFO L87 Difference]: Start difference. First operand 427 states and 607 transitions. Second operand 4 states. [2020-12-22 07:05:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:24,626 INFO L93 Difference]: Finished difference Result 1576 states and 2236 transitions. [2020-12-22 07:05:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:05:24,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-12-22 07:05:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:24,638 INFO L225 Difference]: With dead ends: 1576 [2020-12-22 07:05:24,638 INFO L226 Difference]: Without dead ends: 1169 [2020-12-22 07:05:24,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2020-12-22 07:05:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1094. [2020-12-22 07:05:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-12-22 07:05:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1528 transitions. [2020-12-22 07:05:24,743 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1528 transitions. Word has length 40 [2020-12-22 07:05:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:24,745 INFO L481 AbstractCegarLoop]: Abstraction has 1094 states and 1528 transitions. [2020-12-22 07:05:24,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:05:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1528 transitions. [2020-12-22 07:05:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 07:05:24,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:24,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:24,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:05:24,747 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:24,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1178051785, now seen corresponding path program 1 times [2020-12-22 07:05:24,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:24,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717337096] [2020-12-22 07:05:24,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:24,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717337096] [2020-12-22 07:05:24,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:24,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:05:24,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674810434] [2020-12-22 07:05:24,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:05:24,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:24,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:05:24,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:24,842 INFO L87 Difference]: Start difference. First operand 1094 states and 1528 transitions. Second operand 3 states. [2020-12-22 07:05:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:25,011 INFO L93 Difference]: Finished difference Result 2533 states and 3533 transitions. [2020-12-22 07:05:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:05:25,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 07:05:25,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:25,021 INFO L225 Difference]: With dead ends: 2533 [2020-12-22 07:05:25,021 INFO L226 Difference]: Without dead ends: 1460 [2020-12-22 07:05:25,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:25,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-12-22 07:05:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1428. [2020-12-22 07:05:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1428 states. [2020-12-22 07:05:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1968 transitions. [2020-12-22 07:05:25,162 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1968 transitions. Word has length 41 [2020-12-22 07:05:25,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:25,162 INFO L481 AbstractCegarLoop]: Abstraction has 1428 states and 1968 transitions. [2020-12-22 07:05:25,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:05:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1968 transitions. [2020-12-22 07:05:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 07:05:25,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:25,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:25,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:05:25,164 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:25,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:25,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2143426552, now seen corresponding path program 1 times [2020-12-22 07:05:25,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:25,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101476850] [2020-12-22 07:05:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:25,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101476850] [2020-12-22 07:05:25,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:25,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:05:25,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70727652] [2020-12-22 07:05:25,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:05:25,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:25,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:05:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:25,218 INFO L87 Difference]: Start difference. First operand 1428 states and 1968 transitions. Second operand 5 states. [2020-12-22 07:05:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:25,518 INFO L93 Difference]: Finished difference Result 4207 states and 5902 transitions. [2020-12-22 07:05:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:05:25,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 07:05:25,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:25,535 INFO L225 Difference]: With dead ends: 4207 [2020-12-22 07:05:25,535 INFO L226 Difference]: Without dead ends: 2804 [2020-12-22 07:05:25,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:05:25,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2020-12-22 07:05:25,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 1470. [2020-12-22 07:05:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1470 states. [2020-12-22 07:05:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 1995 transitions. [2020-12-22 07:05:25,703 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 1995 transitions. Word has length 41 [2020-12-22 07:05:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:25,704 INFO L481 AbstractCegarLoop]: Abstraction has 1470 states and 1995 transitions. [2020-12-22 07:05:25,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:05:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 1995 transitions. [2020-12-22 07:05:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 07:05:25,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:25,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:25,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:05:25,705 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:25,706 INFO L82 PathProgramCache]: Analyzing trace with hash 555078650, now seen corresponding path program 1 times [2020-12-22 07:05:25,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:25,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394062916] [2020-12-22 07:05:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:25,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394062916] [2020-12-22 07:05:25,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:25,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:05:25,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854338653] [2020-12-22 07:05:25,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:05:25,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:25,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:05:25,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:05:25,753 INFO L87 Difference]: Start difference. First operand 1470 states and 1995 transitions. Second operand 4 states. [2020-12-22 07:05:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:26,166 INFO L93 Difference]: Finished difference Result 5362 states and 7334 transitions. [2020-12-22 07:05:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:05:26,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-12-22 07:05:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:26,190 INFO L225 Difference]: With dead ends: 5362 [2020-12-22 07:05:26,191 INFO L226 Difference]: Without dead ends: 4004 [2020-12-22 07:05:26,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:26,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2020-12-22 07:05:26,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 2314. [2020-12-22 07:05:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-12-22 07:05:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3150 transitions. [2020-12-22 07:05:26,429 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3150 transitions. Word has length 41 [2020-12-22 07:05:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:26,429 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 3150 transitions. [2020-12-22 07:05:26,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:05:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3150 transitions. [2020-12-22 07:05:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 07:05:26,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:26,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:26,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:05:26,431 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2112971018, now seen corresponding path program 1 times [2020-12-22 07:05:26,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:26,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98570109] [2020-12-22 07:05:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:26,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98570109] [2020-12-22 07:05:26,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:26,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:05:26,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223033935] [2020-12-22 07:05:26,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:05:26,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:26,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:05:26,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:26,512 INFO L87 Difference]: Start difference. First operand 2314 states and 3150 transitions. Second operand 5 states. [2020-12-22 07:05:27,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:27,226 INFO L93 Difference]: Finished difference Result 8160 states and 11182 transitions. [2020-12-22 07:05:27,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:05:27,227 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-12-22 07:05:27,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:27,260 INFO L225 Difference]: With dead ends: 8160 [2020-12-22 07:05:27,261 INFO L226 Difference]: Without dead ends: 6452 [2020-12-22 07:05:27,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:05:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6452 states. [2020-12-22 07:05:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6452 to 3793. [2020-12-22 07:05:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3793 states. [2020-12-22 07:05:27,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 5166 transitions. [2020-12-22 07:05:27,688 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 5166 transitions. Word has length 48 [2020-12-22 07:05:27,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:27,688 INFO L481 AbstractCegarLoop]: Abstraction has 3793 states and 5166 transitions. [2020-12-22 07:05:27,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:05:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 5166 transitions. [2020-12-22 07:05:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 07:05:27,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:27,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:27,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:05:27,690 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1420212558, now seen corresponding path program 1 times [2020-12-22 07:05:27,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:27,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794379992] [2020-12-22 07:05:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:27,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794379992] [2020-12-22 07:05:27,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:27,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:05:27,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644516083] [2020-12-22 07:05:27,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:05:27,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:27,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:05:27,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:27,746 INFO L87 Difference]: Start difference. First operand 3793 states and 5166 transitions. Second operand 3 states. [2020-12-22 07:05:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:28,440 INFO L93 Difference]: Finished difference Result 10718 states and 14524 transitions. [2020-12-22 07:05:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:05:28,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 07:05:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:28,483 INFO L225 Difference]: With dead ends: 10718 [2020-12-22 07:05:28,484 INFO L226 Difference]: Without dead ends: 6950 [2020-12-22 07:05:28,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2020-12-22 07:05:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 6865. [2020-12-22 07:05:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6865 states. [2020-12-22 07:05:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6865 states to 6865 states and 9161 transitions. [2020-12-22 07:05:29,224 INFO L78 Accepts]: Start accepts. Automaton has 6865 states and 9161 transitions. Word has length 52 [2020-12-22 07:05:29,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:29,224 INFO L481 AbstractCegarLoop]: Abstraction has 6865 states and 9161 transitions. [2020-12-22 07:05:29,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:05:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 6865 states and 9161 transitions. [2020-12-22 07:05:29,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 07:05:29,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:29,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:29,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:05:29,227 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:29,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1475283929, now seen corresponding path program 1 times [2020-12-22 07:05:29,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:29,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577000585] [2020-12-22 07:05:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:29,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577000585] [2020-12-22 07:05:29,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:29,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:05:29,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490101067] [2020-12-22 07:05:29,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:05:29,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:29,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:05:29,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:05:29,345 INFO L87 Difference]: Start difference. First operand 6865 states and 9161 transitions. Second operand 6 states. [2020-12-22 07:05:30,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:30,728 INFO L93 Difference]: Finished difference Result 19301 states and 25907 transitions. [2020-12-22 07:05:30,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:05:30,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 07:05:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:30,774 INFO L225 Difference]: With dead ends: 19301 [2020-12-22 07:05:30,774 INFO L226 Difference]: Without dead ends: 13394 [2020-12-22 07:05:30,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:05:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13394 states. [2020-12-22 07:05:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13394 to 8619. [2020-12-22 07:05:31,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8619 states. [2020-12-22 07:05:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8619 states to 8619 states and 11522 transitions. [2020-12-22 07:05:31,631 INFO L78 Accepts]: Start accepts. Automaton has 8619 states and 11522 transitions. Word has length 53 [2020-12-22 07:05:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:31,633 INFO L481 AbstractCegarLoop]: Abstraction has 8619 states and 11522 transitions. [2020-12-22 07:05:31,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:05:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 8619 states and 11522 transitions. [2020-12-22 07:05:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 07:05:31,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:31,637 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:05:31,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:05:31,637 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:31,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1170295472, now seen corresponding path program 1 times [2020-12-22 07:05:31,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:31,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215538563] [2020-12-22 07:05:31,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:05:31,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215538563] [2020-12-22 07:05:31,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:31,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:05:31,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161059793] [2020-12-22 07:05:31,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:05:31,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:31,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:05:31,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:31,729 INFO L87 Difference]: Start difference. First operand 8619 states and 11522 transitions. Second operand 3 states. [2020-12-22 07:05:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:33,075 INFO L93 Difference]: Finished difference Result 24890 states and 33001 transitions. [2020-12-22 07:05:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:05:33,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-22 07:05:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:33,118 INFO L225 Difference]: With dead ends: 24890 [2020-12-22 07:05:33,119 INFO L226 Difference]: Without dead ends: 16296 [2020-12-22 07:05:33,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2020-12-22 07:05:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 16290. [2020-12-22 07:05:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16290 states. [2020-12-22 07:05:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16290 states to 16290 states and 21183 transitions. [2020-12-22 07:05:34,381 INFO L78 Accepts]: Start accepts. Automaton has 16290 states and 21183 transitions. Word has length 57 [2020-12-22 07:05:34,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:34,381 INFO L481 AbstractCegarLoop]: Abstraction has 16290 states and 21183 transitions. [2020-12-22 07:05:34,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:05:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 16290 states and 21183 transitions. [2020-12-22 07:05:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 07:05:34,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:34,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:34,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:05:34,385 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:34,385 INFO L82 PathProgramCache]: Analyzing trace with hash 171117839, now seen corresponding path program 1 times [2020-12-22 07:05:34,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:34,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121865145] [2020-12-22 07:05:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:34,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121865145] [2020-12-22 07:05:34,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:34,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:05:34,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139984283] [2020-12-22 07:05:34,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:05:34,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:34,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:05:34,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:34,446 INFO L87 Difference]: Start difference. First operand 16290 states and 21183 transitions. Second operand 5 states. [2020-12-22 07:05:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:35,826 INFO L93 Difference]: Finished difference Result 34254 states and 44830 transitions. [2020-12-22 07:05:35,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:05:35,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-12-22 07:05:35,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:35,883 INFO L225 Difference]: With dead ends: 34254 [2020-12-22 07:05:35,883 INFO L226 Difference]: Without dead ends: 21536 [2020-12-22 07:05:35,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21536 states. [2020-12-22 07:05:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21536 to 21406. [2020-12-22 07:05:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21406 states. [2020-12-22 07:05:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21406 states to 21406 states and 27875 transitions. [2020-12-22 07:05:37,134 INFO L78 Accepts]: Start accepts. Automaton has 21406 states and 27875 transitions. Word has length 58 [2020-12-22 07:05:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:37,134 INFO L481 AbstractCegarLoop]: Abstraction has 21406 states and 27875 transitions. [2020-12-22 07:05:37,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:05:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 21406 states and 27875 transitions. [2020-12-22 07:05:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 07:05:37,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:37,137 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:05:37,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:05:37,137 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:37,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1927952390, now seen corresponding path program 1 times [2020-12-22 07:05:37,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:37,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421287882] [2020-12-22 07:05:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:37,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421287882] [2020-12-22 07:05:37,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:37,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:05:37,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065912772] [2020-12-22 07:05:37,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:05:37,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:37,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:05:37,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:05:37,177 INFO L87 Difference]: Start difference. First operand 21406 states and 27875 transitions. Second operand 4 states. [2020-12-22 07:05:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:39,612 INFO L93 Difference]: Finished difference Result 56769 states and 73796 transitions. [2020-12-22 07:05:39,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:05:39,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-12-22 07:05:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:39,713 INFO L225 Difference]: With dead ends: 56769 [2020-12-22 07:05:39,714 INFO L226 Difference]: Without dead ends: 35409 [2020-12-22 07:05:39,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:05:39,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35409 states. [2020-12-22 07:05:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35409 to 31293. [2020-12-22 07:05:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31293 states. [2020-12-22 07:05:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31293 states to 31293 states and 40448 transitions. [2020-12-22 07:05:42,261 INFO L78 Accepts]: Start accepts. Automaton has 31293 states and 40448 transitions. Word has length 59 [2020-12-22 07:05:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:42,261 INFO L481 AbstractCegarLoop]: Abstraction has 31293 states and 40448 transitions. [2020-12-22 07:05:42,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:05:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31293 states and 40448 transitions. [2020-12-22 07:05:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 07:05:42,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:42,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:42,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:05:42,267 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:42,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:42,268 INFO L82 PathProgramCache]: Analyzing trace with hash -348509553, now seen corresponding path program 1 times [2020-12-22 07:05:42,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:42,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100991153] [2020-12-22 07:05:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:42,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100991153] [2020-12-22 07:05:42,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:42,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:05:42,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132115717] [2020-12-22 07:05:42,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:05:42,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:42,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:05:42,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:05:42,391 INFO L87 Difference]: Start difference. First operand 31293 states and 40448 transitions. Second operand 6 states. [2020-12-22 07:05:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:47,339 INFO L93 Difference]: Finished difference Result 97977 states and 127906 transitions. [2020-12-22 07:05:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:05:47,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-12-22 07:05:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:47,524 INFO L225 Difference]: With dead ends: 97977 [2020-12-22 07:05:47,524 INFO L226 Difference]: Without dead ends: 74169 [2020-12-22 07:05:47,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:05:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74169 states. [2020-12-22 07:05:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74169 to 43231. [2020-12-22 07:05:51,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43231 states. [2020-12-22 07:05:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43231 states to 43231 states and 56108 transitions. [2020-12-22 07:05:51,309 INFO L78 Accepts]: Start accepts. Automaton has 43231 states and 56108 transitions. Word has length 61 [2020-12-22 07:05:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:51,309 INFO L481 AbstractCegarLoop]: Abstraction has 43231 states and 56108 transitions. [2020-12-22 07:05:51,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:05:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 43231 states and 56108 transitions. [2020-12-22 07:05:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:05:51,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:51,315 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:51,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:05:51,316 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash 807662601, now seen corresponding path program 1 times [2020-12-22 07:05:51,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:51,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698653879] [2020-12-22 07:05:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:51,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698653879] [2020-12-22 07:05:51,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:51,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:05:51,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127906140] [2020-12-22 07:05:51,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:05:51,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:51,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:05:51,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:51,360 INFO L87 Difference]: Start difference. First operand 43231 states and 56108 transitions. Second operand 3 states. [2020-12-22 07:05:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:54,075 INFO L93 Difference]: Finished difference Result 81948 states and 106613 transitions. [2020-12-22 07:05:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:05:54,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:05:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:54,162 INFO L225 Difference]: With dead ends: 81948 [2020-12-22 07:05:54,162 INFO L226 Difference]: Without dead ends: 43235 [2020-12-22 07:05:54,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43235 states. [2020-12-22 07:05:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43235 to 43231. [2020-12-22 07:05:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43231 states. [2020-12-22 07:05:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43231 states to 43231 states and 55751 transitions. [2020-12-22 07:05:57,381 INFO L78 Accepts]: Start accepts. Automaton has 43231 states and 55751 transitions. Word has length 65 [2020-12-22 07:05:57,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:57,381 INFO L481 AbstractCegarLoop]: Abstraction has 43231 states and 55751 transitions. [2020-12-22 07:05:57,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:05:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 43231 states and 55751 transitions. [2020-12-22 07:05:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:05:57,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:57,386 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:57,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:05:57,387 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:57,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:57,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1009486535, now seen corresponding path program 1 times [2020-12-22 07:05:57,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:57,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399045883] [2020-12-22 07:05:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:05:57,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399045883] [2020-12-22 07:05:57,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:57,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:05:57,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11440843] [2020-12-22 07:05:57,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:05:57,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:57,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:05:57,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:05:57,411 INFO L87 Difference]: Start difference. First operand 43231 states and 55751 transitions. Second operand 3 states. [2020-12-22 07:06:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:00,224 INFO L93 Difference]: Finished difference Result 46083 states and 59207 transitions. [2020-12-22 07:06:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:06:00,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:06:00,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:00,266 INFO L225 Difference]: With dead ends: 46083 [2020-12-22 07:06:00,266 INFO L226 Difference]: Without dead ends: 43193 [2020-12-22 07:06:00,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:06:00,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43193 states. [2020-12-22 07:06:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43193 to 43193. [2020-12-22 07:06:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43193 states. [2020-12-22 07:06:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43193 states to 43193 states and 55711 transitions. [2020-12-22 07:06:02,905 INFO L78 Accepts]: Start accepts. Automaton has 43193 states and 55711 transitions. Word has length 65 [2020-12-22 07:06:02,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:02,906 INFO L481 AbstractCegarLoop]: Abstraction has 43193 states and 55711 transitions. [2020-12-22 07:06:02,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:06:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 43193 states and 55711 transitions. [2020-12-22 07:06:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:06:02,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:02,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:02,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:06:02,911 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:02,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1172878516, now seen corresponding path program 1 times [2020-12-22 07:06:02,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:02,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257470619] [2020-12-22 07:06:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:06:02,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257470619] [2020-12-22 07:06:02,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:06:02,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:06:02,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558153390] [2020-12-22 07:06:02,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:06:02,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:06:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:06:02,948 INFO L87 Difference]: Start difference. First operand 43193 states and 55711 transitions. Second operand 4 states. [2020-12-22 07:06:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:06,113 INFO L93 Difference]: Finished difference Result 86812 states and 111917 transitions. [2020-12-22 07:06:06,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:06:06,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-12-22 07:06:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:06,164 INFO L225 Difference]: With dead ends: 86812 [2020-12-22 07:06:06,164 INFO L226 Difference]: Without dead ends: 43665 [2020-12-22 07:06:06,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:06:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43665 states. [2020-12-22 07:06:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43665 to 43193. [2020-12-22 07:06:09,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43193 states. [2020-12-22 07:06:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43193 states to 43193 states and 54871 transitions. [2020-12-22 07:06:09,141 INFO L78 Accepts]: Start accepts. Automaton has 43193 states and 54871 transitions. Word has length 66 [2020-12-22 07:06:09,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:09,141 INFO L481 AbstractCegarLoop]: Abstraction has 43193 states and 54871 transitions. [2020-12-22 07:06:09,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:06:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 43193 states and 54871 transitions. [2020-12-22 07:06:09,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:06:09,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:09,146 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:06:09,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:06:09,146 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:09,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:09,147 INFO L82 PathProgramCache]: Analyzing trace with hash 2075083770, now seen corresponding path program 1 times [2020-12-22 07:06:09,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:09,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072171621] [2020-12-22 07:06:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:06:09,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072171621] [2020-12-22 07:06:09,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:06:09,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:06:09,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355153661] [2020-12-22 07:06:09,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:06:09,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:09,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:06:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:06:09,189 INFO L87 Difference]: Start difference. First operand 43193 states and 54871 transitions. Second operand 4 states. [2020-12-22 07:06:12,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:12,764 INFO L93 Difference]: Finished difference Result 87492 states and 111061 transitions. [2020-12-22 07:06:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:06:12,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-12-22 07:06:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:12,821 INFO L225 Difference]: With dead ends: 87492 [2020-12-22 07:06:12,821 INFO L226 Difference]: Without dead ends: 43965 [2020-12-22 07:06:12,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:06:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43965 states. [2020-12-22 07:06:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43965 to 42492. [2020-12-22 07:06:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42492 states. [2020-12-22 07:06:15,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42492 states to 42492 states and 53550 transitions. [2020-12-22 07:06:15,807 INFO L78 Accepts]: Start accepts. Automaton has 42492 states and 53550 transitions. Word has length 68 [2020-12-22 07:06:15,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:15,807 INFO L481 AbstractCegarLoop]: Abstraction has 42492 states and 53550 transitions. [2020-12-22 07:06:15,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:06:15,807 INFO L276 IsEmpty]: Start isEmpty. Operand 42492 states and 53550 transitions. [2020-12-22 07:06:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:06:15,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:15,810 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:15,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:06:15,811 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:15,811 INFO L82 PathProgramCache]: Analyzing trace with hash 556975009, now seen corresponding path program 1 times [2020-12-22 07:06:15,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:15,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870244920] [2020-12-22 07:06:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:06:15,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870244920] [2020-12-22 07:06:15,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:06:15,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:06:15,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808094872] [2020-12-22 07:06:15,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:06:15,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:15,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:06:15,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:06:15,852 INFO L87 Difference]: Start difference. First operand 42492 states and 53550 transitions. Second operand 5 states. [2020-12-22 07:06:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:22,454 INFO L93 Difference]: Finished difference Result 129492 states and 163978 transitions. [2020-12-22 07:06:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:06:22,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 07:06:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:22,573 INFO L225 Difference]: With dead ends: 129492 [2020-12-22 07:06:22,573 INFO L226 Difference]: Without dead ends: 95188 [2020-12-22 07:06:22,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:06:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95188 states. [2020-12-22 07:06:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95188 to 47339. [2020-12-22 07:06:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47339 states. [2020-12-22 07:06:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47339 states to 47339 states and 59589 transitions. [2020-12-22 07:06:26,444 INFO L78 Accepts]: Start accepts. Automaton has 47339 states and 59589 transitions. Word has length 69 [2020-12-22 07:06:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:26,444 INFO L481 AbstractCegarLoop]: Abstraction has 47339 states and 59589 transitions. [2020-12-22 07:06:26,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:06:26,444 INFO L276 IsEmpty]: Start isEmpty. Operand 47339 states and 59589 transitions. [2020-12-22 07:06:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 07:06:26,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:26,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:26,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:06:26,452 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:26,452 INFO L82 PathProgramCache]: Analyzing trace with hash -636342002, now seen corresponding path program 1 times [2020-12-22 07:06:26,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:26,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004677132] [2020-12-22 07:06:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:06:26,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004677132] [2020-12-22 07:06:26,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:06:26,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:06:26,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613755195] [2020-12-22 07:06:26,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:06:26,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:26,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:06:26,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:06:26,487 INFO L87 Difference]: Start difference. First operand 47339 states and 59589 transitions. Second operand 3 states. [2020-12-22 07:06:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:32,512 INFO L93 Difference]: Finished difference Result 124874 states and 157980 transitions. [2020-12-22 07:06:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:06:32,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-12-22 07:06:32,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:32,631 INFO L225 Difference]: With dead ends: 124874 [2020-12-22 07:06:32,631 INFO L226 Difference]: Without dead ends: 80836 [2020-12-22 07:06:32,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:06:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80836 states. [2020-12-22 07:06:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80836 to 72525. [2020-12-22 07:06:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72525 states. [2020-12-22 07:06:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72525 states to 72525 states and 91951 transitions. [2020-12-22 07:06:38,353 INFO L78 Accepts]: Start accepts. Automaton has 72525 states and 91951 transitions. Word has length 85 [2020-12-22 07:06:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:38,354 INFO L481 AbstractCegarLoop]: Abstraction has 72525 states and 91951 transitions. [2020-12-22 07:06:38,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:06:38,354 INFO L276 IsEmpty]: Start isEmpty. Operand 72525 states and 91951 transitions. [2020-12-22 07:06:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 07:06:38,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:38,369 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:38,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:06:38,369 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:38,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:38,370 INFO L82 PathProgramCache]: Analyzing trace with hash 929392569, now seen corresponding path program 1 times [2020-12-22 07:06:38,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:38,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155664748] [2020-12-22 07:06:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:06:38,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155664748] [2020-12-22 07:06:38,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:06:38,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:06:38,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202753401] [2020-12-22 07:06:38,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:06:38,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:38,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:06:38,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:06:38,425 INFO L87 Difference]: Start difference. First operand 72525 states and 91951 transitions. Second operand 5 states. [2020-12-22 07:06:48,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:48,914 INFO L93 Difference]: Finished difference Result 200327 states and 251132 transitions. [2020-12-22 07:06:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:06:48,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-12-22 07:06:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:49,109 INFO L225 Difference]: With dead ends: 200327 [2020-12-22 07:06:49,109 INFO L226 Difference]: Without dead ends: 130987 [2020-12-22 07:06:49,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:06:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130987 states. [2020-12-22 07:06:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130987 to 114018. [2020-12-22 07:06:58,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114018 states. [2020-12-22 07:06:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114018 states to 114018 states and 140391 transitions. [2020-12-22 07:06:58,381 INFO L78 Accepts]: Start accepts. Automaton has 114018 states and 140391 transitions. Word has length 98 [2020-12-22 07:06:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:58,382 INFO L481 AbstractCegarLoop]: Abstraction has 114018 states and 140391 transitions. [2020-12-22 07:06:58,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:06:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 114018 states and 140391 transitions. [2020-12-22 07:06:58,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:06:58,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:58,399 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:58,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:06:58,399 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:58,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1073423074, now seen corresponding path program 1 times [2020-12-22 07:06:58,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:58,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484081978] [2020-12-22 07:06:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 07:06:58,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484081978] [2020-12-22 07:06:58,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:06:58,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:06:58,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997814962] [2020-12-22 07:06:58,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:06:58,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:58,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:06:58,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:06:58,460 INFO L87 Difference]: Start difference. First operand 114018 states and 140391 transitions. Second operand 5 states. [2020-12-22 07:07:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:07:04,234 INFO L93 Difference]: Finished difference Result 178334 states and 221029 transitions. [2020-12-22 07:07:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:07:04,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2020-12-22 07:07:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:07:04,328 INFO L225 Difference]: With dead ends: 178334 [2020-12-22 07:07:04,328 INFO L226 Difference]: Without dead ends: 64362 [2020-12-22 07:07:04,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:07:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64362 states. [2020-12-22 07:07:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64362 to 56702. [2020-12-22 07:07:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56702 states. [2020-12-22 07:07:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56702 states to 56702 states and 71070 transitions. [2020-12-22 07:07:09,350 INFO L78 Accepts]: Start accepts. Automaton has 56702 states and 71070 transitions. Word has length 100 [2020-12-22 07:07:09,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:07:09,351 INFO L481 AbstractCegarLoop]: Abstraction has 56702 states and 71070 transitions. [2020-12-22 07:07:09,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:07:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 56702 states and 71070 transitions. [2020-12-22 07:07:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 07:07:09,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:07:09,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:07:09,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:07:09,358 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:07:09,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:07:09,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1096113079, now seen corresponding path program 1 times [2020-12-22 07:07:09,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:07:09,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144926004] [2020-12-22 07:07:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:07:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 07:07:09,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144926004] [2020-12-22 07:07:09,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:07:09,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:07:09,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839752429] [2020-12-22 07:07:09,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:07:09,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:07:09,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:07:09,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:07:09,399 INFO L87 Difference]: Start difference. First operand 56702 states and 71070 transitions. Second operand 3 states. [2020-12-22 07:07:14,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:07:14,186 INFO L93 Difference]: Finished difference Result 113014 states and 141685 transitions. [2020-12-22 07:07:14,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:07:14,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2020-12-22 07:07:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:07:14,257 INFO L225 Difference]: With dead ends: 113014 [2020-12-22 07:07:14,258 INFO L226 Difference]: Without dead ends: 56679 [2020-12-22 07:07:14,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:07:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56679 states.