/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/seq-mthreaded/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:19:18,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:19:18,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:19:19,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:19:19,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:19:19,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:19:19,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:19:19,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:19:19,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:19:19,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:19:19,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:19:19,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:19:19,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:19:19,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:19:19,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:19:19,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:19:19,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:19:19,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:19:19,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:19:19,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:19:19,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:19:19,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:19:19,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:19:19,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:19:19,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:19:19,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:19:19,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:19:19,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:19:19,058 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:19:19,087 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:19:19,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:19:19,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:19:19,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:19:19,091 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:19:19,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:19:19,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:19:19,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:19:19,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:19:19,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:19:19,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:19:19,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:19:19,093 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:19:19,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:19:19,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:19:19,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:19:19,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:19:19,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:19:19,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:19:19,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:19:19,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:19:19,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:19:19,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:19:19,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:19:19,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:19:19,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:19:19,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:19:19,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:19:19,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:19:19,550 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:19:19,551 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:19:19,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c [2020-12-22 07:19:19,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a10163c88/dd3cd667cae04f96b979343b69c73eb9/FLAG38b0cd14d [2020-12-22 07:19:20,246 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:19:20,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c [2020-12-22 07:19:20,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a10163c88/dd3cd667cae04f96b979343b69c73eb9/FLAG38b0cd14d [2020-12-22 07:19:20,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a10163c88/dd3cd667cae04f96b979343b69c73eb9 [2020-12-22 07:19:20,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:19:20,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:19:20,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:19:20,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:19:20,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:19:20,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:19:20" (1/1) ... [2020-12-22 07:19:20,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e6dc39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:20, skipping insertion in model container [2020-12-22 07:19:20,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:19:20" (1/1) ... [2020-12-22 07:19:20,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:19:20,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:19:20,954 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/seq-mthreaded/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c[12764,12777] [2020-12-22 07:19:20,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:19:20,997 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:19:21,119 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/seq-mthreaded/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c[12764,12777] [2020-12-22 07:19:21,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:19:21,144 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:19:21,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:21 WrapperNode [2020-12-22 07:19:21,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:19:21,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:19:21,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:19:21,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:19:21,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:21" (1/1) ... [2020-12-22 07:19:21,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:21" (1/1) ... [2020-12-22 07:19:21,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:19:21,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:19:21,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:19:21,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:19:21,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:21" (1/1) ... [2020-12-22 07:19:21,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:21" (1/1) ... [2020-12-22 07:19:21,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:21" (1/1) ... [2020-12-22 07:19:21,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:21" (1/1) ... [2020-12-22 07:19:21,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:21" (1/1) ... [2020-12-22 07:19:21,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:21" (1/1) ... [2020-12-22 07:19:21,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:21" (1/1) ... [2020-12-22 07:19:21,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:19:21,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:19:21,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:19:21,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:19:21,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:21" (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 07:19:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:19:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:19:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:19:21,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:19:22,491 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:19:22,491 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 07:19:22,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:19:22 BoogieIcfgContainer [2020-12-22 07:19:22,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:19:22,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:19:22,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:19:22,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:19:22,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:19:20" (1/3) ... [2020-12-22 07:19:22,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a5c476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:19:22, skipping insertion in model container [2020-12-22 07:19:22,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:19:21" (2/3) ... [2020-12-22 07:19:22,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a5c476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:19:22, skipping insertion in model container [2020-12-22 07:19:22,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:19:22" (3/3) ... [2020-12-22 07:19:22,505 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.BOUNDED-6.pals.c [2020-12-22 07:19:22,513 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:19:22,519 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:19:22,540 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:19:22,572 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:19:22,573 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:19:22,573 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:19:22,573 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:19:22,573 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:19:22,573 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:19:22,574 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:19:22,574 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:19:22,595 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states. [2020-12-22 07:19:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:19:22,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:22,606 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] [2020-12-22 07:19:22,607 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:22,614 INFO L82 PathProgramCache]: Analyzing trace with hash -306716250, now seen corresponding path program 1 times [2020-12-22 07:19:22,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:22,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056549686] [2020-12-22 07:19:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:22,944 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 07:19:22,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056549686] [2020-12-22 07:19:22,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:22,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:19:22,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126173236] [2020-12-22 07:19:22,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:19:22,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:22,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:19:22,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:19:22,971 INFO L87 Difference]: Start difference. First operand 131 states. Second operand 2 states. [2020-12-22 07:19:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:23,003 INFO L93 Difference]: Finished difference Result 206 states and 352 transitions. [2020-12-22 07:19:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:19:23,005 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:19:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:23,019 INFO L225 Difference]: With dead ends: 206 [2020-12-22 07:19:23,020 INFO L226 Difference]: Without dead ends: 127 [2020-12-22 07:19:23,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:19:23,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-22 07:19:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-12-22 07:19:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 07:19:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 220 transitions. [2020-12-22 07:19:23,079 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 220 transitions. Word has length 37 [2020-12-22 07:19:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:23,080 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 220 transitions. [2020-12-22 07:19:23,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:19:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 220 transitions. [2020-12-22 07:19:23,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:19:23,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:23,083 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] [2020-12-22 07:19:23,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:19:23,083 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:23,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1124364700, now seen corresponding path program 1 times [2020-12-22 07:19:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:23,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340848556] [2020-12-22 07:19:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:23,348 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 07:19:23,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340848556] [2020-12-22 07:19:23,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:23,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:19:23,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180174244] [2020-12-22 07:19:23,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:19:23,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:23,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:19:23,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:19:23,356 INFO L87 Difference]: Start difference. First operand 127 states and 220 transitions. Second operand 5 states. [2020-12-22 07:19:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:23,557 INFO L93 Difference]: Finished difference Result 271 states and 460 transitions. [2020-12-22 07:19:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:19:23,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:19:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:23,567 INFO L225 Difference]: With dead ends: 271 [2020-12-22 07:19:23,567 INFO L226 Difference]: Without dead ends: 197 [2020-12-22 07:19:23,569 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 07:19:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-22 07:19:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2020-12-22 07:19:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 07:19:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 193 transitions. [2020-12-22 07:19:23,599 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 193 transitions. Word has length 37 [2020-12-22 07:19:23,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:23,603 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 193 transitions. [2020-12-22 07:19:23,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:19:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 193 transitions. [2020-12-22 07:19:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:19:23,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:23,607 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, 1, 1] [2020-12-22 07:19:23,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:19:23,611 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:23,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:23,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1313145683, now seen corresponding path program 1 times [2020-12-22 07:19:23,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:23,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332084414] [2020-12-22 07:19:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:23,759 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 07:19:23,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332084414] [2020-12-22 07:19:23,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:23,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:23,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674547248] [2020-12-22 07:19:23,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:23,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:23,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:23,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:23,768 INFO L87 Difference]: Start difference. First operand 127 states and 193 transitions. Second operand 3 states. [2020-12-22 07:19:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:23,824 INFO L93 Difference]: Finished difference Result 258 states and 412 transitions. [2020-12-22 07:19:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:23,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:19:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:23,831 INFO L225 Difference]: With dead ends: 258 [2020-12-22 07:19:23,831 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 07:19:23,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:19:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 07:19:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-12-22 07:19:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-22 07:19:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 288 transitions. [2020-12-22 07:19:23,871 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 288 transitions. Word has length 63 [2020-12-22 07:19:23,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:23,872 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 288 transitions. [2020-12-22 07:19:23,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 288 transitions. [2020-12-22 07:19:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:19:23,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:23,874 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, 1, 1, 1, 1] [2020-12-22 07:19:23,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:19:23,875 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:23,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:23,876 INFO L82 PathProgramCache]: Analyzing trace with hash -255493166, now seen corresponding path program 1 times [2020-12-22 07:19:23,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:23,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644179314] [2020-12-22 07:19:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:23,961 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 07:19:23,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644179314] [2020-12-22 07:19:23,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:23,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:23,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769562747] [2020-12-22 07:19:23,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:23,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:23,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:23,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:23,964 INFO L87 Difference]: Start difference. First operand 186 states and 288 transitions. Second operand 3 states. [2020-12-22 07:19:23,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:23,991 INFO L93 Difference]: Finished difference Result 313 states and 501 transitions. [2020-12-22 07:19:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:23,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:19:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:23,996 INFO L225 Difference]: With dead ends: 313 [2020-12-22 07:19:23,996 INFO L226 Difference]: Without dead ends: 243 [2020-12-22 07:19:23,997 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 07:19:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-22 07:19:24,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2020-12-22 07:19:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-22 07:19:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 380 transitions. [2020-12-22 07:19:24,033 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 380 transitions. Word has length 65 [2020-12-22 07:19:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:24,034 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 380 transitions. [2020-12-22 07:19:24,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:24,034 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 380 transitions. [2020-12-22 07:19:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:19:24,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:24,036 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, 1, 1, 1, 1] [2020-12-22 07:19:24,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:19:24,036 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1395779292, now seen corresponding path program 1 times [2020-12-22 07:19:24,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:24,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222607822] [2020-12-22 07:19:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:24,124 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 07:19:24,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222607822] [2020-12-22 07:19:24,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:24,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:24,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776195481] [2020-12-22 07:19:24,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:24,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:24,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:24,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:24,127 INFO L87 Difference]: Start difference. First operand 241 states and 380 transitions. Second operand 3 states. [2020-12-22 07:19:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:24,157 INFO L93 Difference]: Finished difference Result 584 states and 947 transitions. [2020-12-22 07:19:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:24,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:19:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:24,160 INFO L225 Difference]: With dead ends: 584 [2020-12-22 07:19:24,160 INFO L226 Difference]: Without dead ends: 402 [2020-12-22 07:19:24,163 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 07:19:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-22 07:19:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-12-22 07:19:24,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-12-22 07:19:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 640 transitions. [2020-12-22 07:19:24,184 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 640 transitions. Word has length 65 [2020-12-22 07:19:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:24,184 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 640 transitions. [2020-12-22 07:19:24,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 640 transitions. [2020-12-22 07:19:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:19:24,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:24,186 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, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:24,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:19:24,186 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:24,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:24,187 INFO L82 PathProgramCache]: Analyzing trace with hash -812427391, now seen corresponding path program 1 times [2020-12-22 07:19:24,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:24,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987511241] [2020-12-22 07:19:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:24,274 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 07:19:24,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987511241] [2020-12-22 07:19:24,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:24,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:24,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731192599] [2020-12-22 07:19:24,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:24,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:24,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:24,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:24,279 INFO L87 Difference]: Start difference. First operand 400 states and 640 transitions. Second operand 3 states. [2020-12-22 07:19:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:24,329 INFO L93 Difference]: Finished difference Result 729 states and 1183 transitions. [2020-12-22 07:19:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:24,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:19:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:24,333 INFO L225 Difference]: With dead ends: 729 [2020-12-22 07:19:24,334 INFO L226 Difference]: Without dead ends: 547 [2020-12-22 07:19:24,335 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 07:19:24,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-12-22 07:19:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2020-12-22 07:19:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2020-12-22 07:19:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 875 transitions. [2020-12-22 07:19:24,372 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 875 transitions. Word has length 67 [2020-12-22 07:19:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:24,375 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 875 transitions. [2020-12-22 07:19:24,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:24,375 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 875 transitions. [2020-12-22 07:19:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:19:24,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:24,378 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, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:24,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:19:24,379 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:24,380 INFO L82 PathProgramCache]: Analyzing trace with hash 221435787, now seen corresponding path program 1 times [2020-12-22 07:19:24,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:24,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448142422] [2020-12-22 07:19:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:24,531 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 07:19:24,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448142422] [2020-12-22 07:19:24,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:24,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:24,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049826728] [2020-12-22 07:19:24,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:24,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:24,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:24,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:24,537 INFO L87 Difference]: Start difference. First operand 545 states and 875 transitions. Second operand 3 states. [2020-12-22 07:19:24,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:24,594 INFO L93 Difference]: Finished difference Result 1434 states and 2326 transitions. [2020-12-22 07:19:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:24,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:19:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:24,602 INFO L225 Difference]: With dead ends: 1434 [2020-12-22 07:19:24,602 INFO L226 Difference]: Without dead ends: 958 [2020-12-22 07:19:24,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:19:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2020-12-22 07:19:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 956. [2020-12-22 07:19:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2020-12-22 07:19:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1532 transitions. [2020-12-22 07:19:24,644 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1532 transitions. Word has length 67 [2020-12-22 07:19:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:24,645 INFO L481 AbstractCegarLoop]: Abstraction has 956 states and 1532 transitions. [2020-12-22 07:19:24,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1532 transitions. [2020-12-22 07:19:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:19:24,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:24,647 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:24,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:19:24,648 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:24,648 INFO L82 PathProgramCache]: Analyzing trace with hash 664156592, now seen corresponding path program 1 times [2020-12-22 07:19:24,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:24,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379391629] [2020-12-22 07:19:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:24,786 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 07:19:24,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379391629] [2020-12-22 07:19:24,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:24,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:24,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244486614] [2020-12-22 07:19:24,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:24,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:24,790 INFO L87 Difference]: Start difference. First operand 956 states and 1532 transitions. Second operand 3 states. [2020-12-22 07:19:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:24,837 INFO L93 Difference]: Finished difference Result 1783 states and 2881 transitions. [2020-12-22 07:19:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:24,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 07:19:24,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:24,845 INFO L225 Difference]: With dead ends: 1783 [2020-12-22 07:19:24,845 INFO L226 Difference]: Without dead ends: 1307 [2020-12-22 07:19:24,846 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 07:19:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-12-22 07:19:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1305. [2020-12-22 07:19:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1305 states. [2020-12-22 07:19:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 2086 transitions. [2020-12-22 07:19:24,899 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 2086 transitions. Word has length 69 [2020-12-22 07:19:24,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:24,900 INFO L481 AbstractCegarLoop]: Abstraction has 1305 states and 2086 transitions. [2020-12-22 07:19:24,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:24,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 2086 transitions. [2020-12-22 07:19:24,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:19:24,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:24,901 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:24,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:19:24,902 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:24,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:24,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1757720902, now seen corresponding path program 1 times [2020-12-22 07:19:24,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:24,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615440291] [2020-12-22 07:19:24,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:25,016 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 07:19:25,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615440291] [2020-12-22 07:19:25,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:25,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:19:25,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108341762] [2020-12-22 07:19:25,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:19:25,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:25,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:19:25,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:19:25,019 INFO L87 Difference]: Start difference. First operand 1305 states and 2086 transitions. Second operand 5 states. [2020-12-22 07:19:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:25,321 INFO L93 Difference]: Finished difference Result 6582 states and 10723 transitions. [2020-12-22 07:19:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:19:25,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 07:19:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:25,349 INFO L225 Difference]: With dead ends: 6582 [2020-12-22 07:19:25,349 INFO L226 Difference]: Without dead ends: 5356 [2020-12-22 07:19:25,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:19:25,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2020-12-22 07:19:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 2452. [2020-12-22 07:19:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2452 states. [2020-12-22 07:19:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3914 transitions. [2020-12-22 07:19:25,479 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3914 transitions. Word has length 69 [2020-12-22 07:19:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:25,479 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 3914 transitions. [2020-12-22 07:19:25,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:19:25,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3914 transitions. [2020-12-22 07:19:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:19:25,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:25,481 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:25,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:19:25,481 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:25,482 INFO L82 PathProgramCache]: Analyzing trace with hash -577605759, now seen corresponding path program 1 times [2020-12-22 07:19:25,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:25,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977601269] [2020-12-22 07:19:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:25,554 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 07:19:25,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977601269] [2020-12-22 07:19:25,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:25,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:25,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668557334] [2020-12-22 07:19:25,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:25,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:25,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:25,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:25,557 INFO L87 Difference]: Start difference. First operand 2452 states and 3914 transitions. Second operand 4 states. [2020-12-22 07:19:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:25,806 INFO L93 Difference]: Finished difference Result 7943 states and 12835 transitions. [2020-12-22 07:19:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:25,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 07:19:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:25,836 INFO L225 Difference]: With dead ends: 7943 [2020-12-22 07:19:25,836 INFO L226 Difference]: Without dead ends: 5570 [2020-12-22 07:19:25,861 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 07:19:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2020-12-22 07:19:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 3992. [2020-12-22 07:19:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3992 states. [2020-12-22 07:19:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 6384 transitions. [2020-12-22 07:19:26,076 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 6384 transitions. Word has length 70 [2020-12-22 07:19:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:26,077 INFO L481 AbstractCegarLoop]: Abstraction has 3992 states and 6384 transitions. [2020-12-22 07:19:26,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 6384 transitions. [2020-12-22 07:19:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:19:26,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:26,078 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:26,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:19:26,078 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:26,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:26,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1815229649, now seen corresponding path program 1 times [2020-12-22 07:19:26,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:26,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829502893] [2020-12-22 07:19:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:26,172 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 07:19:26,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829502893] [2020-12-22 07:19:26,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:26,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:26,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322079337] [2020-12-22 07:19:26,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:26,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:26,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:26,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:26,175 INFO L87 Difference]: Start difference. First operand 3992 states and 6384 transitions. Second operand 4 states. [2020-12-22 07:19:26,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:26,575 INFO L93 Difference]: Finished difference Result 13018 states and 20914 transitions. [2020-12-22 07:19:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:26,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 07:19:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:26,626 INFO L225 Difference]: With dead ends: 13018 [2020-12-22 07:19:26,627 INFO L226 Difference]: Without dead ends: 9105 [2020-12-22 07:19:26,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:26,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2020-12-22 07:19:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 6388. [2020-12-22 07:19:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6388 states. [2020-12-22 07:19:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6388 states to 6388 states and 10164 transitions. [2020-12-22 07:19:27,058 INFO L78 Accepts]: Start accepts. Automaton has 6388 states and 10164 transitions. Word has length 71 [2020-12-22 07:19:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:27,058 INFO L481 AbstractCegarLoop]: Abstraction has 6388 states and 10164 transitions. [2020-12-22 07:19:27,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:27,059 INFO L276 IsEmpty]: Start isEmpty. Operand 6388 states and 10164 transitions. [2020-12-22 07:19:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:19:27,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:27,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:27,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:19:27,060 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1147279688, now seen corresponding path program 1 times [2020-12-22 07:19:27,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:27,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487990608] [2020-12-22 07:19:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:27,118 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 07:19:27,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487990608] [2020-12-22 07:19:27,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:27,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:27,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078118491] [2020-12-22 07:19:27,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:27,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:27,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:27,121 INFO L87 Difference]: Start difference. First operand 6388 states and 10164 transitions. Second operand 4 states. [2020-12-22 07:19:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:27,743 INFO L93 Difference]: Finished difference Result 20047 states and 32019 transitions. [2020-12-22 07:19:27,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:27,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:19:27,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:27,781 INFO L225 Difference]: With dead ends: 20047 [2020-12-22 07:19:27,781 INFO L226 Difference]: Without dead ends: 13738 [2020-12-22 07:19:27,793 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 07:19:27,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13738 states. [2020-12-22 07:19:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13738 to 10020. [2020-12-22 07:19:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10020 states. [2020-12-22 07:19:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10020 states to 10020 states and 15856 transitions. [2020-12-22 07:19:28,407 INFO L78 Accepts]: Start accepts. Automaton has 10020 states and 15856 transitions. Word has length 72 [2020-12-22 07:19:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:28,407 INFO L481 AbstractCegarLoop]: Abstraction has 10020 states and 15856 transitions. [2020-12-22 07:19:28,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 10020 states and 15856 transitions. [2020-12-22 07:19:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:19:28,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:28,408 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:28,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:19:28,409 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:28,409 INFO L82 PathProgramCache]: Analyzing trace with hash -856706640, now seen corresponding path program 1 times [2020-12-22 07:19:28,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:28,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521589228] [2020-12-22 07:19:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:28,517 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 07:19:28,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521589228] [2020-12-22 07:19:28,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:28,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:28,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806449655] [2020-12-22 07:19:28,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:28,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:28,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:28,520 INFO L87 Difference]: Start difference. First operand 10020 states and 15856 transitions. Second operand 4 states. [2020-12-22 07:19:29,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:29,472 INFO L93 Difference]: Finished difference Result 29688 states and 46962 transitions. [2020-12-22 07:19:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:29,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:19:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:29,533 INFO L225 Difference]: With dead ends: 29688 [2020-12-22 07:19:29,533 INFO L226 Difference]: Without dead ends: 19677 [2020-12-22 07:19:29,555 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 07:19:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19677 states. [2020-12-22 07:19:30,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19677 to 19675. [2020-12-22 07:19:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19675 states. [2020-12-22 07:19:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19675 states to 19675 states and 30894 transitions. [2020-12-22 07:19:30,640 INFO L78 Accepts]: Start accepts. Automaton has 19675 states and 30894 transitions. Word has length 74 [2020-12-22 07:19:30,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:30,640 INFO L481 AbstractCegarLoop]: Abstraction has 19675 states and 30894 transitions. [2020-12-22 07:19:30,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 19675 states and 30894 transitions. [2020-12-22 07:19:30,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:19:30,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:30,641 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:30,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:19:30,642 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:30,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:30,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1857988380, now seen corresponding path program 1 times [2020-12-22 07:19:30,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:30,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19800264] [2020-12-22 07:19:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:30,677 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 07:19:30,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19800264] [2020-12-22 07:19:30,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:30,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:30,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708966188] [2020-12-22 07:19:30,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:30,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:30,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:30,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:30,679 INFO L87 Difference]: Start difference. First operand 19675 states and 30894 transitions. Second operand 3 states. [2020-12-22 07:19:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:32,177 INFO L93 Difference]: Finished difference Result 58987 states and 92620 transitions. [2020-12-22 07:19:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:32,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 07:19:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:32,267 INFO L225 Difference]: With dead ends: 58987 [2020-12-22 07:19:32,268 INFO L226 Difference]: Without dead ends: 39340 [2020-12-22 07:19:32,300 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 07:19:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39340 states. [2020-12-22 07:19:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39340 to 19677. [2020-12-22 07:19:33,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19677 states. [2020-12-22 07:19:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19677 states to 19677 states and 30896 transitions. [2020-12-22 07:19:33,616 INFO L78 Accepts]: Start accepts. Automaton has 19677 states and 30896 transitions. Word has length 75 [2020-12-22 07:19:33,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:33,616 INFO L481 AbstractCegarLoop]: Abstraction has 19677 states and 30896 transitions. [2020-12-22 07:19:33,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:33,616 INFO L276 IsEmpty]: Start isEmpty. Operand 19677 states and 30896 transitions. [2020-12-22 07:19:33,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:19:33,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:33,617 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:33,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:19:33,618 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:33,618 INFO L82 PathProgramCache]: Analyzing trace with hash 424514133, now seen corresponding path program 1 times [2020-12-22 07:19:33,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:33,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012784063] [2020-12-22 07:19:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:33,763 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 07:19:33,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012784063] [2020-12-22 07:19:33,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:33,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:33,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803086016] [2020-12-22 07:19:33,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:33,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:33,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:33,766 INFO L87 Difference]: Start difference. First operand 19677 states and 30896 transitions. Second operand 4 states. [2020-12-22 07:19:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:35,168 INFO L93 Difference]: Finished difference Result 58291 states and 91488 transitions. [2020-12-22 07:19:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:35,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:19:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:35,262 INFO L225 Difference]: With dead ends: 58291 [2020-12-22 07:19:35,263 INFO L226 Difference]: Without dead ends: 38626 [2020-12-22 07:19:35,304 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 07:19:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38626 states. [2020-12-22 07:19:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38626 to 38624. [2020-12-22 07:19:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38624 states. [2020-12-22 07:19:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38624 states to 38624 states and 60157 transitions. [2020-12-22 07:19:37,211 INFO L78 Accepts]: Start accepts. Automaton has 38624 states and 60157 transitions. Word has length 76 [2020-12-22 07:19:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:37,211 INFO L481 AbstractCegarLoop]: Abstraction has 38624 states and 60157 transitions. [2020-12-22 07:19:37,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 38624 states and 60157 transitions. [2020-12-22 07:19:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:19:37,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:37,213 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:37,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:19:37,214 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:37,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:37,219 INFO L82 PathProgramCache]: Analyzing trace with hash 551656516, now seen corresponding path program 1 times [2020-12-22 07:19:37,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:37,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190483253] [2020-12-22 07:19:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:19:37,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190483253] [2020-12-22 07:19:37,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:37,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:37,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990276879] [2020-12-22 07:19:37,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:37,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:37,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:37,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:37,309 INFO L87 Difference]: Start difference. First operand 38624 states and 60157 transitions. Second operand 4 states. [2020-12-22 07:19:39,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:39,814 INFO L93 Difference]: Finished difference Result 114364 states and 178019 transitions. [2020-12-22 07:19:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:39,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:19:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:39,987 INFO L225 Difference]: With dead ends: 114364 [2020-12-22 07:19:39,987 INFO L226 Difference]: Without dead ends: 75786 [2020-12-22 07:19:40,033 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 07:19:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75786 states. [2020-12-22 07:19:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75786 to 75784. [2020-12-22 07:19:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75784 states. [2020-12-22 07:19:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75784 states to 75784 states and 117031 transitions. [2020-12-22 07:19:43,447 INFO L78 Accepts]: Start accepts. Automaton has 75784 states and 117031 transitions. Word has length 76 [2020-12-22 07:19:43,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:43,447 INFO L481 AbstractCegarLoop]: Abstraction has 75784 states and 117031 transitions. [2020-12-22 07:19:43,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:19:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 75784 states and 117031 transitions. [2020-12-22 07:19:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:19:43,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:43,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:43,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:19:43,451 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:43,451 INFO L82 PathProgramCache]: Analyzing trace with hash -656359944, now seen corresponding path program 1 times [2020-12-22 07:19:43,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:43,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148458915] [2020-12-22 07:19:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:43,666 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 07:19:43,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148458915] [2020-12-22 07:19:43,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:43,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:19:43,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717240551] [2020-12-22 07:19:43,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:19:43,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:43,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:19:43,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:19:43,678 INFO L87 Difference]: Start difference. First operand 75784 states and 117031 transitions. Second operand 3 states. [2020-12-22 07:19:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:48,792 INFO L93 Difference]: Finished difference Result 227228 states and 350901 transitions. [2020-12-22 07:19:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:19:48,792 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 07:19:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:49,116 INFO L225 Difference]: With dead ends: 227228 [2020-12-22 07:19:49,117 INFO L226 Difference]: Without dead ends: 151518 [2020-12-22 07:19:49,201 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 07:19:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151518 states. [2020-12-22 07:19:52,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151518 to 75792. [2020-12-22 07:19:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75792 states. [2020-12-22 07:19:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75792 states to 75792 states and 117039 transitions. [2020-12-22 07:19:53,250 INFO L78 Accepts]: Start accepts. Automaton has 75792 states and 117039 transitions. Word has length 77 [2020-12-22 07:19:53,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:19:53,250 INFO L481 AbstractCegarLoop]: Abstraction has 75792 states and 117039 transitions. [2020-12-22 07:19:53,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:19:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 75792 states and 117039 transitions. [2020-12-22 07:19:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:19:53,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:19:53,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:19:53,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:19:53,252 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:19:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:19:53,253 INFO L82 PathProgramCache]: Analyzing trace with hash 834408617, now seen corresponding path program 1 times [2020-12-22 07:19:53,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:19:53,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068632086] [2020-12-22 07:19:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:19:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:19:53,347 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 07:19:53,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068632086] [2020-12-22 07:19:53,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:19:53,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:19:53,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146719603] [2020-12-22 07:19:53,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:19:53,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:19:53,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:19:53,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:19:53,349 INFO L87 Difference]: Start difference. First operand 75792 states and 117039 transitions. Second operand 4 states. [2020-12-22 07:19:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:19:59,273 INFO L93 Difference]: Finished difference Result 224404 states and 346298 transitions. [2020-12-22 07:19:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:19:59,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:19:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:19:59,544 INFO L225 Difference]: With dead ends: 224404 [2020-12-22 07:19:59,544 INFO L226 Difference]: Without dead ends: 148667 [2020-12-22 07:19:59,607 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 07:19:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148667 states. [2020-12-22 07:20:06,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148667 to 148665. [2020-12-22 07:20:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148665 states. [2020-12-22 07:20:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148665 states to 148665 states and 227541 transitions. [2020-12-22 07:20:06,811 INFO L78 Accepts]: Start accepts. Automaton has 148665 states and 227541 transitions. Word has length 78 [2020-12-22 07:20:06,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:06,811 INFO L481 AbstractCegarLoop]: Abstraction has 148665 states and 227541 transitions. [2020-12-22 07:20:06,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 148665 states and 227541 transitions. [2020-12-22 07:20:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:20:06,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:06,815 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:06,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:20:06,815 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:06,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:06,816 INFO L82 PathProgramCache]: Analyzing trace with hash 640680152, now seen corresponding path program 1 times [2020-12-22 07:20:06,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:06,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881829982] [2020-12-22 07:20:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:06,900 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 07:20:06,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881829982] [2020-12-22 07:20:06,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:06,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:06,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949503027] [2020-12-22 07:20:06,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:06,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:06,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:06,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:06,903 INFO L87 Difference]: Start difference. First operand 148665 states and 227541 transitions. Second operand 4 states. [2020-12-22 07:20:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:19,431 INFO L93 Difference]: Finished difference Result 440021 states and 672927 transitions. [2020-12-22 07:20:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:19,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:20:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:20,044 INFO L225 Difference]: With dead ends: 440021 [2020-12-22 07:20:20,045 INFO L226 Difference]: Without dead ends: 291515 [2020-12-22 07:20:20,190 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 07:20:20,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291515 states. [2020-12-22 07:20:33,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291515 to 291513. [2020-12-22 07:20:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291513 states. [2020-12-22 07:20:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291513 states to 291513 states and 442037 transitions. [2020-12-22 07:20:34,535 INFO L78 Accepts]: Start accepts. Automaton has 291513 states and 442037 transitions. Word has length 78 [2020-12-22 07:20:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:34,536 INFO L481 AbstractCegarLoop]: Abstraction has 291513 states and 442037 transitions. [2020-12-22 07:20:34,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 291513 states and 442037 transitions. [2020-12-22 07:20:34,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:20:34,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:34,549 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:34,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:20:34,551 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:34,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:34,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1890599668, now seen corresponding path program 1 times [2020-12-22 07:20:34,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:34,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576236605] [2020-12-22 07:20:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:34,599 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 07:20:34,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576236605] [2020-12-22 07:20:34,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:34,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:34,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144336481] [2020-12-22 07:20:34,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:34,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:34,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:34,602 INFO L87 Difference]: Start difference. First operand 291513 states and 442037 transitions. Second operand 3 states. [2020-12-22 07:20:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:59,308 INFO L93 Difference]: Finished difference Result 873245 states and 1324519 transitions. [2020-12-22 07:20:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:59,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:20:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:01,014 INFO L225 Difference]: With dead ends: 873245 [2020-12-22 07:21:01,014 INFO L226 Difference]: Without dead ends: 582795 [2020-12-22 07:21:01,347 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 07:21:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582795 states. [2020-12-22 07:21:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582795 to 291545. [2020-12-22 07:21:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291545 states. [2020-12-22 07:21:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291545 states to 291545 states and 442069 transitions. [2020-12-22 07:21:20,820 INFO L78 Accepts]: Start accepts. Automaton has 291545 states and 442069 transitions. Word has length 79 [2020-12-22 07:21:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:20,820 INFO L481 AbstractCegarLoop]: Abstraction has 291545 states and 442069 transitions. [2020-12-22 07:21:20,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:20,821 INFO L276 IsEmpty]: Start isEmpty. Operand 291545 states and 442069 transitions. [2020-12-22 07:21:20,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:21:20,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:20,844 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:20,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:21:20,850 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:20,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:20,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1453451011, now seen corresponding path program 1 times [2020-12-22 07:21:20,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:20,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263719305] [2020-12-22 07:21:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:21,066 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 07:21:21,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263719305] [2020-12-22 07:21:21,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:21,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:21,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737879901] [2020-12-22 07:21:21,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:21,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:21,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:21,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:21,071 INFO L87 Difference]: Start difference. First operand 291545 states and 442069 transitions. Second operand 4 states. [2020-12-22 07:21:51,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:51,494 INFO L93 Difference]: Finished difference Result 862768 states and 1306995 transitions. [2020-12-22 07:21:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:51,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 07:21:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:52,831 INFO L225 Difference]: With dead ends: 862768 [2020-12-22 07:21:52,831 INFO L226 Difference]: Without dead ends: 571474 [2020-12-22 07:21:53,158 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 07:21:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571474 states. [2020-12-22 07:22:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571474 to 571472. [2020-12-22 07:22:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571472 states.