/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.3.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:20:18,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:20:18,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:20:18,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:20:18,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:20:18,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:20:18,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:20:18,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:20:18,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:20:18,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:20:18,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:20:18,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:20:18,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:20:18,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:20:18,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:20:18,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:20:18,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:20:18,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:20:18,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:20:18,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:20:18,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:20:18,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:20:18,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:20:18,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:20:18,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:20:18,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:20:18,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:20:18,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:20:18,658 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:20:18,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:20:18,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:20:18,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:20:18,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:20:18,715 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:20:18,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:20:18,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:20:18,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:20:18,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:20:18,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:20:18,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:20:18,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:20:18,720 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:20:18,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:20:18,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:20:18,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:20:18,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:20:18,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:20:18,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:20:18,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:20:18,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:20:18,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:20:18,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:20:18,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:20:18,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:20:18,722 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:20:19,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:20:19,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:20:19,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:20:19,131 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:20:19,132 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:20:19,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:20:19,231 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37677e7ef/795b5405f5e049f4ad6849b922cb9641/FLAG8a2ae65fa [2020-12-22 07:20:20,029 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:20:20,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:20:20,051 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37677e7ef/795b5405f5e049f4ad6849b922cb9641/FLAG8a2ae65fa [2020-12-22 07:20:20,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37677e7ef/795b5405f5e049f4ad6849b922cb9641 [2020-12-22 07:20:20,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:20:20,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:20:20,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:20:20,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:20:20,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:20:20,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:20" (1/1) ... [2020-12-22 07:20:20,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2779df4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20, skipping insertion in model container [2020-12-22 07:20:20,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:20" (1/1) ... [2020-12-22 07:20:20,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:20:20,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:20:20,672 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.3.4.ufo.UNBOUNDED.pals.c[12968,12981] [2020-12-22 07:20:20,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:20:20,701 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:20:20,842 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.3.4.ufo.UNBOUNDED.pals.c[12968,12981] [2020-12-22 07:20:20,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:20:20,877 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:20:20,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20 WrapperNode [2020-12-22 07:20:20,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:20:20,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:20:20,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:20:20,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:20:20,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20" (1/1) ... [2020-12-22 07:20:20,934 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20" (1/1) ... [2020-12-22 07:20:21,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:20:21,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:20:21,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:20:21,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:20:21,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20" (1/1) ... [2020-12-22 07:20:21,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20" (1/1) ... [2020-12-22 07:20:21,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20" (1/1) ... [2020-12-22 07:20:21,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20" (1/1) ... [2020-12-22 07:20:21,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20" (1/1) ... [2020-12-22 07:20:21,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20" (1/1) ... [2020-12-22 07:20:21,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20" (1/1) ... [2020-12-22 07:20:21,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:20:21,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:20:21,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:20:21,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:20:21,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20" (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 07:20:21,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:20:21,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:20:21,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:20:21,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:20:22,384 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:20:22,384 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:20:22,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:22 BoogieIcfgContainer [2020-12-22 07:20:22,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:20:22,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:20:22,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:20:22,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:20:22,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:20:20" (1/3) ... [2020-12-22 07:20:22,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba283c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:22, skipping insertion in model container [2020-12-22 07:20:22,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:20" (2/3) ... [2020-12-22 07:20:22,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba283c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:22, skipping insertion in model container [2020-12-22 07:20:22,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:22" (3/3) ... [2020-12-22 07:20:22,396 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:20:22,403 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:20:22,408 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:20:22,428 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:20:22,458 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:20:22,458 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:20:22,458 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:20:22,458 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:20:22,458 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:20:22,459 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:20:22,459 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:20:22,459 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:20:22,479 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states. [2020-12-22 07:20:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:20:22,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:22,489 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 07:20:22,489 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:22,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:22,495 INFO L82 PathProgramCache]: Analyzing trace with hash 298975739, now seen corresponding path program 1 times [2020-12-22 07:20:22,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:22,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669263210] [2020-12-22 07:20:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:22,785 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 07:20:22,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669263210] [2020-12-22 07:20:22,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:22,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:20:22,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491321451] [2020-12-22 07:20:22,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:20:22,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:22,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:20:22,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:20:22,816 INFO L87 Difference]: Start difference. First operand 136 states. Second operand 2 states. [2020-12-22 07:20:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:22,852 INFO L93 Difference]: Finished difference Result 212 states and 365 transitions. [2020-12-22 07:20:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:20:22,854 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:20:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:22,868 INFO L225 Difference]: With dead ends: 212 [2020-12-22 07:20:22,868 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 07:20:22,872 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 07:20:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 07:20:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-12-22 07:20:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 07:20:22,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 228 transitions. [2020-12-22 07:20:22,929 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 228 transitions. Word has length 37 [2020-12-22 07:20:22,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:22,930 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 228 transitions. [2020-12-22 07:20:22,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:20:22,931 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 228 transitions. [2020-12-22 07:20:22,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:20:22,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:22,935 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 07:20:22,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:20:22,936 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:22,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:22,938 INFO L82 PathProgramCache]: Analyzing trace with hash -518672711, now seen corresponding path program 1 times [2020-12-22 07:20:22,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:22,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202087058] [2020-12-22 07:20:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:23,224 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 07:20:23,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202087058] [2020-12-22 07:20:23,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:23,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:20:23,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162484161] [2020-12-22 07:20:23,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:20:23,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:23,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:20:23,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:23,233 INFO L87 Difference]: Start difference. First operand 132 states and 228 transitions. Second operand 5 states. [2020-12-22 07:20:23,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:23,470 INFO L93 Difference]: Finished difference Result 211 states and 358 transitions. [2020-12-22 07:20:23,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:20:23,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:20:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:23,473 INFO L225 Difference]: With dead ends: 211 [2020-12-22 07:20:23,473 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 07:20:23,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:20:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 07:20:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-12-22 07:20:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 07:20:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 201 transitions. [2020-12-22 07:20:23,487 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 201 transitions. Word has length 37 [2020-12-22 07:20:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:23,487 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 201 transitions. [2020-12-22 07:20:23,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:20:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 201 transitions. [2020-12-22 07:20:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:20:23,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:23,490 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 07:20:23,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:20:23,491 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:23,491 INFO L82 PathProgramCache]: Analyzing trace with hash -707453694, now seen corresponding path program 1 times [2020-12-22 07:20:23,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:23,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979918914] [2020-12-22 07:20:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:23,619 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 07:20:23,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979918914] [2020-12-22 07:20:23,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:23,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:23,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81596447] [2020-12-22 07:20:23,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:23,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:23,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:23,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:23,624 INFO L87 Difference]: Start difference. First operand 132 states and 201 transitions. Second operand 3 states. [2020-12-22 07:20:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:23,722 INFO L93 Difference]: Finished difference Result 267 states and 426 transitions. [2020-12-22 07:20:23,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:23,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:20:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:23,728 INFO L225 Difference]: With dead ends: 267 [2020-12-22 07:20:23,728 INFO L226 Difference]: Without dead ends: 192 [2020-12-22 07:20:23,729 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 07:20:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-22 07:20:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-12-22 07:20:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 07:20:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 292 transitions. [2020-12-22 07:20:23,764 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 292 transitions. Word has length 63 [2020-12-22 07:20:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:23,769 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 292 transitions. [2020-12-22 07:20:23,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:23,770 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 292 transitions. [2020-12-22 07:20:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:20:23,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:23,776 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 07:20:23,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:20:23,777 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:23,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:23,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1995563601, now seen corresponding path program 1 times [2020-12-22 07:20:23,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:23,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450314147] [2020-12-22 07:20:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:23,951 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 07:20:23,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450314147] [2020-12-22 07:20:23,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:23,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:23,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003709836] [2020-12-22 07:20:23,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:23,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:23,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:23,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:23,959 INFO L87 Difference]: Start difference. First operand 189 states and 292 transitions. Second operand 3 states. [2020-12-22 07:20:24,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:24,021 INFO L93 Difference]: Finished difference Result 439 states and 700 transitions. [2020-12-22 07:20:24,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:24,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:20:24,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:24,027 INFO L225 Difference]: With dead ends: 439 [2020-12-22 07:20:24,027 INFO L226 Difference]: Without dead ends: 307 [2020-12-22 07:20:24,031 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 07:20:24,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-22 07:20:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 303. [2020-12-22 07:20:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-12-22 07:20:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 476 transitions. [2020-12-22 07:20:24,059 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 476 transitions. Word has length 65 [2020-12-22 07:20:24,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:24,060 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 476 transitions. [2020-12-22 07:20:24,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 476 transitions. [2020-12-22 07:20:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:20:24,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:24,065 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 07:20:24,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:20:24,066 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:24,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:24,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2137075392, now seen corresponding path program 1 times [2020-12-22 07:20:24,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:24,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33992940] [2020-12-22 07:20:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:24,158 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 07:20:24,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33992940] [2020-12-22 07:20:24,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:24,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:24,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703904468] [2020-12-22 07:20:24,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:24,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:24,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:24,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:24,163 INFO L87 Difference]: Start difference. First operand 303 states and 476 transitions. Second operand 3 states. [2020-12-22 07:20:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:24,246 INFO L93 Difference]: Finished difference Result 767 states and 1226 transitions. [2020-12-22 07:20:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:24,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:20:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:24,250 INFO L225 Difference]: With dead ends: 767 [2020-12-22 07:20:24,250 INFO L226 Difference]: Without dead ends: 521 [2020-12-22 07:20:24,252 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 07:20:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-12-22 07:20:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 515. [2020-12-22 07:20:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-12-22 07:20:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 812 transitions. [2020-12-22 07:20:24,313 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 812 transitions. Word has length 67 [2020-12-22 07:20:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:24,313 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 812 transitions. [2020-12-22 07:20:24,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:24,314 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 812 transitions. [2020-12-22 07:20:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:20:24,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:24,315 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 07:20:24,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:20:24,316 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:24,316 INFO L82 PathProgramCache]: Analyzing trace with hash -544230961, now seen corresponding path program 1 times [2020-12-22 07:20:24,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:24,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511361979] [2020-12-22 07:20:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:24,451 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 07:20:24,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511361979] [2020-12-22 07:20:24,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:24,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:20:24,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575032467] [2020-12-22 07:20:24,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:20:24,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:24,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:20:24,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:24,454 INFO L87 Difference]: Start difference. First operand 515 states and 812 transitions. Second operand 5 states. [2020-12-22 07:20:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:24,798 INFO L93 Difference]: Finished difference Result 2595 states and 4186 transitions. [2020-12-22 07:20:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:20:24,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 07:20:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:24,829 INFO L225 Difference]: With dead ends: 2595 [2020-12-22 07:20:24,830 INFO L226 Difference]: Without dead ends: 2137 [2020-12-22 07:20:24,834 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 07:20:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2020-12-22 07:20:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 955. [2020-12-22 07:20:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-12-22 07:20:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1516 transitions. [2020-12-22 07:20:24,908 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1516 transitions. Word has length 69 [2020-12-22 07:20:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:24,910 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1516 transitions. [2020-12-22 07:20:24,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:20:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1516 transitions. [2020-12-22 07:20:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:20:24,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:24,912 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 07:20:24,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:20:24,912 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1614123231, now seen corresponding path program 1 times [2020-12-22 07:20:24,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:24,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662034409] [2020-12-22 07:20:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:25,012 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 07:20:25,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662034409] [2020-12-22 07:20:25,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:25,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:25,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471937293] [2020-12-22 07:20:25,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:25,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:25,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:25,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:25,014 INFO L87 Difference]: Start difference. First operand 955 states and 1516 transitions. Second operand 4 states. [2020-12-22 07:20:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:25,254 INFO L93 Difference]: Finished difference Result 3461 states and 5545 transitions. [2020-12-22 07:20:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:25,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 07:20:25,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:25,272 INFO L225 Difference]: With dead ends: 3461 [2020-12-22 07:20:25,272 INFO L226 Difference]: Without dead ends: 2563 [2020-12-22 07:20:25,276 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 07:20:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2020-12-22 07:20:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 1750. [2020-12-22 07:20:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1750 states. [2020-12-22 07:20:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2781 transitions. [2020-12-22 07:20:25,362 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2781 transitions. Word has length 70 [2020-12-22 07:20:25,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:25,362 INFO L481 AbstractCegarLoop]: Abstraction has 1750 states and 2781 transitions. [2020-12-22 07:20:25,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:25,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2781 transitions. [2020-12-22 07:20:25,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:20:25,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:25,365 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 07:20:25,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:20:25,365 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:25,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:25,366 INFO L82 PathProgramCache]: Analyzing trace with hash -252040890, now seen corresponding path program 1 times [2020-12-22 07:20:25,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:25,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822172938] [2020-12-22 07:20:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:25,507 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 07:20:25,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822172938] [2020-12-22 07:20:25,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:25,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:25,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845959686] [2020-12-22 07:20:25,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:25,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:25,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:25,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:25,510 INFO L87 Difference]: Start difference. First operand 1750 states and 2781 transitions. Second operand 4 states. [2020-12-22 07:20:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:25,741 INFO L93 Difference]: Finished difference Result 5250 states and 8418 transitions. [2020-12-22 07:20:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:25,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 07:20:25,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:25,763 INFO L225 Difference]: With dead ends: 5250 [2020-12-22 07:20:25,764 INFO L226 Difference]: Without dead ends: 3557 [2020-12-22 07:20:25,770 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 07:20:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2020-12-22 07:20:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2583. [2020-12-22 07:20:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2583 states. [2020-12-22 07:20:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 4102 transitions. [2020-12-22 07:20:25,922 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 4102 transitions. Word has length 71 [2020-12-22 07:20:25,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:25,922 INFO L481 AbstractCegarLoop]: Abstraction has 2583 states and 4102 transitions. [2020-12-22 07:20:25,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:25,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 4102 transitions. [2020-12-22 07:20:25,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:20:25,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:25,929 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 07:20:25,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:20:25,930 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:25,931 INFO L82 PathProgramCache]: Analyzing trace with hash -630566449, now seen corresponding path program 1 times [2020-12-22 07:20:25,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:25,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101460764] [2020-12-22 07:20:25,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:26,007 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 07:20:26,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101460764] [2020-12-22 07:20:26,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:26,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:26,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693364195] [2020-12-22 07:20:26,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:26,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:26,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:26,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:26,017 INFO L87 Difference]: Start difference. First operand 2583 states and 4102 transitions. Second operand 3 states. [2020-12-22 07:20:26,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:26,174 INFO L93 Difference]: Finished difference Result 5240 states and 8342 transitions. [2020-12-22 07:20:26,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:26,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:20:26,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:26,194 INFO L225 Difference]: With dead ends: 5240 [2020-12-22 07:20:26,195 INFO L226 Difference]: Without dead ends: 3766 [2020-12-22 07:20:26,198 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 07:20:26,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2020-12-22 07:20:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3764. [2020-12-22 07:20:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3764 states. [2020-12-22 07:20:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 5928 transitions. [2020-12-22 07:20:26,388 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 5928 transitions. Word has length 72 [2020-12-22 07:20:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:26,388 INFO L481 AbstractCegarLoop]: Abstraction has 3764 states and 5928 transitions. [2020-12-22 07:20:26,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 5928 transitions. [2020-12-22 07:20:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:20:26,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:26,390 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 07:20:26,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:20:26,391 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash -808156936, now seen corresponding path program 1 times [2020-12-22 07:20:26,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:26,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518228071] [2020-12-22 07:20:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:26,454 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 07:20:26,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518228071] [2020-12-22 07:20:26,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:26,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:26,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159983530] [2020-12-22 07:20:26,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:26,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:26,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:26,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:26,457 INFO L87 Difference]: Start difference. First operand 3764 states and 5928 transitions. Second operand 4 states. [2020-12-22 07:20:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:26,866 INFO L93 Difference]: Finished difference Result 11568 states and 18341 transitions. [2020-12-22 07:20:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:26,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:20:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:26,911 INFO L225 Difference]: With dead ends: 11568 [2020-12-22 07:20:26,912 INFO L226 Difference]: Without dead ends: 7992 [2020-12-22 07:20:26,920 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 07:20:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7992 states. [2020-12-22 07:20:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7992 to 5856. [2020-12-22 07:20:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5856 states. [2020-12-22 07:20:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5856 states to 5856 states and 9200 transitions. [2020-12-22 07:20:27,232 INFO L78 Accepts]: Start accepts. Automaton has 5856 states and 9200 transitions. Word has length 72 [2020-12-22 07:20:27,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:27,233 INFO L481 AbstractCegarLoop]: Abstraction has 5856 states and 9200 transitions. [2020-12-22 07:20:27,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 5856 states and 9200 transitions. [2020-12-22 07:20:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:20:27,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:27,234 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 07:20:27,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:20:27,235 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:27,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:27,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1968035874, now seen corresponding path program 1 times [2020-12-22 07:20:27,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:27,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908702224] [2020-12-22 07:20:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:27,320 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 07:20:27,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908702224] [2020-12-22 07:20:27,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:27,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:27,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885517842] [2020-12-22 07:20:27,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:27,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:27,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:27,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:27,322 INFO L87 Difference]: Start difference. First operand 5856 states and 9200 transitions. Second operand 3 states. [2020-12-22 07:20:27,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:27,633 INFO L93 Difference]: Finished difference Result 12746 states and 20090 transitions. [2020-12-22 07:20:27,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:27,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:20:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:27,671 INFO L225 Difference]: With dead ends: 12746 [2020-12-22 07:20:27,671 INFO L226 Difference]: Without dead ends: 8627 [2020-12-22 07:20:27,682 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 07:20:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8627 states. [2020-12-22 07:20:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8627 to 8625. [2020-12-22 07:20:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8625 states. [2020-12-22 07:20:28,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8625 states to 8625 states and 13441 transitions. [2020-12-22 07:20:28,132 INFO L78 Accepts]: Start accepts. Automaton has 8625 states and 13441 transitions. Word has length 72 [2020-12-22 07:20:28,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:28,133 INFO L481 AbstractCegarLoop]: Abstraction has 8625 states and 13441 transitions. [2020-12-22 07:20:28,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:28,133 INFO L276 IsEmpty]: Start isEmpty. Operand 8625 states and 13441 transitions. [2020-12-22 07:20:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:20:28,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:28,134 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 07:20:28,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:20:28,135 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:28,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:28,135 INFO L82 PathProgramCache]: Analyzing trace with hash 952039085, now seen corresponding path program 1 times [2020-12-22 07:20:28,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:28,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657617141] [2020-12-22 07:20:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:28,190 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 07:20:28,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657617141] [2020-12-22 07:20:28,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:28,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:28,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472017695] [2020-12-22 07:20:28,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:28,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:28,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:28,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:28,193 INFO L87 Difference]: Start difference. First operand 8625 states and 13441 transitions. Second operand 3 states. [2020-12-22 07:20:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:28,723 INFO L93 Difference]: Finished difference Result 20658 states and 32373 transitions. [2020-12-22 07:20:28,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:28,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:20:28,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:28,757 INFO L225 Difference]: With dead ends: 20658 [2020-12-22 07:20:28,757 INFO L226 Difference]: Without dead ends: 12112 [2020-12-22 07:20:28,771 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 07:20:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12112 states. [2020-12-22 07:20:29,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12112 to 12110. [2020-12-22 07:20:29,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12110 states. [2020-12-22 07:20:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12110 states to 12110 states and 18945 transitions. [2020-12-22 07:20:29,402 INFO L78 Accepts]: Start accepts. Automaton has 12110 states and 18945 transitions. Word has length 72 [2020-12-22 07:20:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:29,403 INFO L481 AbstractCegarLoop]: Abstraction has 12110 states and 18945 transitions. [2020-12-22 07:20:29,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 12110 states and 18945 transitions. [2020-12-22 07:20:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:20:29,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:29,404 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 07:20:29,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:20:29,404 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:29,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1377255792, now seen corresponding path program 1 times [2020-12-22 07:20:29,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:29,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653914136] [2020-12-22 07:20:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:29,556 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 07:20:29,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653914136] [2020-12-22 07:20:29,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:29,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:29,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247573801] [2020-12-22 07:20:29,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:29,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:29,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:29,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:29,559 INFO L87 Difference]: Start difference. First operand 12110 states and 18945 transitions. Second operand 4 states. [2020-12-22 07:20:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:30,635 INFO L93 Difference]: Finished difference Result 36020 states and 56312 transitions. [2020-12-22 07:20:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:30,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:20:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:30,704 INFO L225 Difference]: With dead ends: 36020 [2020-12-22 07:20:30,704 INFO L226 Difference]: Without dead ends: 23919 [2020-12-22 07:20:30,729 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 07:20:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23919 states. [2020-12-22 07:20:31,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23919 to 23917. [2020-12-22 07:20:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23917 states. [2020-12-22 07:20:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23917 states to 23917 states and 37176 transitions. [2020-12-22 07:20:32,039 INFO L78 Accepts]: Start accepts. Automaton has 23917 states and 37176 transitions. Word has length 74 [2020-12-22 07:20:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:32,040 INFO L481 AbstractCegarLoop]: Abstraction has 23917 states and 37176 transitions. [2020-12-22 07:20:32,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 23917 states and 37176 transitions. [2020-12-22 07:20:32,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:20:32,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:32,041 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 07:20:32,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:20:32,041 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:32,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:32,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1916429764, now seen corresponding path program 1 times [2020-12-22 07:20:32,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:32,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713314704] [2020-12-22 07:20:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:32,086 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 07:20:32,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713314704] [2020-12-22 07:20:32,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:32,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:32,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738881684] [2020-12-22 07:20:32,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:32,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:32,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:32,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:32,088 INFO L87 Difference]: Start difference. First operand 23917 states and 37176 transitions. Second operand 3 states. [2020-12-22 07:20:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:33,889 INFO L93 Difference]: Finished difference Result 71713 states and 111466 transitions. [2020-12-22 07:20:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:33,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 07:20:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:34,048 INFO L225 Difference]: With dead ends: 71713 [2020-12-22 07:20:34,048 INFO L226 Difference]: Without dead ends: 47824 [2020-12-22 07:20:34,092 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 07:20:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47824 states. [2020-12-22 07:20:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47824 to 23919. [2020-12-22 07:20:35,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23919 states. [2020-12-22 07:20:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23919 states to 23919 states and 37178 transitions. [2020-12-22 07:20:35,761 INFO L78 Accepts]: Start accepts. Automaton has 23919 states and 37178 transitions. Word has length 75 [2020-12-22 07:20:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:35,761 INFO L481 AbstractCegarLoop]: Abstraction has 23919 states and 37178 transitions. [2020-12-22 07:20:35,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 23919 states and 37178 transitions. [2020-12-22 07:20:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:20:35,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:35,765 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 07:20:35,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:20:35,765 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:35,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:35,767 INFO L82 PathProgramCache]: Analyzing trace with hash 539922453, now seen corresponding path program 1 times [2020-12-22 07:20:35,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:35,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24369182] [2020-12-22 07:20:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:35,894 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 07:20:35,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24369182] [2020-12-22 07:20:35,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:35,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:35,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514721974] [2020-12-22 07:20:35,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:35,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:35,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:35,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:35,897 INFO L87 Difference]: Start difference. First operand 23919 states and 37178 transitions. Second operand 4 states. [2020-12-22 07:20:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:37,568 INFO L93 Difference]: Finished difference Result 71141 states and 110500 transitions. [2020-12-22 07:20:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:37,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:20:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:37,666 INFO L225 Difference]: With dead ends: 71141 [2020-12-22 07:20:37,667 INFO L226 Difference]: Without dead ends: 47234 [2020-12-22 07:20:37,695 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 07:20:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47234 states. [2020-12-22 07:20:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47234 to 47232. [2020-12-22 07:20:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47232 states. [2020-12-22 07:20:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47232 states to 47232 states and 72929 transitions. [2020-12-22 07:20:39,530 INFO L78 Accepts]: Start accepts. Automaton has 47232 states and 72929 transitions. Word has length 76 [2020-12-22 07:20:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:39,530 INFO L481 AbstractCegarLoop]: Abstraction has 47232 states and 72929 transitions. [2020-12-22 07:20:39,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 47232 states and 72929 transitions. [2020-12-22 07:20:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:20:39,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:39,532 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 07:20:39,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:20:39,532 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:39,533 INFO L82 PathProgramCache]: Analyzing trace with hash 31107364, now seen corresponding path program 1 times [2020-12-22 07:20:39,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:39,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906918581] [2020-12-22 07:20:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:39,631 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 07:20:39,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906918581] [2020-12-22 07:20:39,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:39,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:39,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014376703] [2020-12-22 07:20:39,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:39,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:39,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:39,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:39,633 INFO L87 Difference]: Start difference. First operand 47232 states and 72929 transitions. Second operand 4 states. [2020-12-22 07:20:42,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:42,728 INFO L93 Difference]: Finished difference Result 139948 states and 215975 transitions. [2020-12-22 07:20:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:42,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:20:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:42,884 INFO L225 Difference]: With dead ends: 139948 [2020-12-22 07:20:42,884 INFO L226 Difference]: Without dead ends: 92762 [2020-12-22 07:20:43,157 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 07:20:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92762 states. [2020-12-22 07:20:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92762 to 92760. [2020-12-22 07:20:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92760 states. [2020-12-22 07:20:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92760 states to 92760 states and 142095 transitions. [2020-12-22 07:20:47,155 INFO L78 Accepts]: Start accepts. Automaton has 92760 states and 142095 transitions. Word has length 76 [2020-12-22 07:20:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:47,156 INFO L481 AbstractCegarLoop]: Abstraction has 92760 states and 142095 transitions. [2020-12-22 07:20:47,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 92760 states and 142095 transitions. [2020-12-22 07:20:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:20:47,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:47,158 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 07:20:47,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:20:47,159 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:47,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1176909096, now seen corresponding path program 1 times [2020-12-22 07:20:47,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:47,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579096200] [2020-12-22 07:20:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:47,207 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 07:20:47,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579096200] [2020-12-22 07:20:47,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:47,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:47,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788756895] [2020-12-22 07:20:47,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:47,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:47,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:47,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:47,210 INFO L87 Difference]: Start difference. First operand 92760 states and 142095 transitions. Second operand 3 states. [2020-12-22 07:20:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:54,004 INFO L93 Difference]: Finished difference Result 278156 states and 426093 transitions. [2020-12-22 07:20:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:54,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 07:20:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:54,533 INFO L225 Difference]: With dead ends: 278156 [2020-12-22 07:20:54,533 INFO L226 Difference]: Without dead ends: 185470 [2020-12-22 07:20:54,615 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 07:20:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185470 states. [2020-12-22 07:20:59,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185470 to 92768. [2020-12-22 07:20:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92768 states. [2020-12-22 07:20:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92768 states to 92768 states and 142103 transitions. [2020-12-22 07:20:59,429 INFO L78 Accepts]: Start accepts. Automaton has 92768 states and 142103 transitions. Word has length 77 [2020-12-22 07:20:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:59,429 INFO L481 AbstractCegarLoop]: Abstraction has 92768 states and 142103 transitions. [2020-12-22 07:20:59,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 92768 states and 142103 transitions. [2020-12-22 07:20:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:20:59,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:59,439 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 07:20:59,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:20:59,439 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:59,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:59,440 INFO L82 PathProgramCache]: Analyzing trace with hash 604186441, now seen corresponding path program 1 times [2020-12-22 07:20:59,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:59,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616834302] [2020-12-22 07:20:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:59,573 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 07:20:59,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616834302] [2020-12-22 07:20:59,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:59,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:59,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229429174] [2020-12-22 07:20:59,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:59,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:59,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:59,580 INFO L87 Difference]: Start difference. First operand 92768 states and 142103 transitions. Second operand 4 states. [2020-12-22 07:21:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:06,521 INFO L93 Difference]: Finished difference Result 274692 states and 420450 transitions. [2020-12-22 07:21:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:06,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:21:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:06,902 INFO L225 Difference]: With dead ends: 274692 [2020-12-22 07:21:06,902 INFO L226 Difference]: Without dead ends: 181979 [2020-12-22 07:21:06,979 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 07:21:07,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181979 states. [2020-12-22 07:21:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181979 to 181977. [2020-12-22 07:21:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181977 states. [2020-12-22 07:21:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181977 states to 181977 states and 276229 transitions. [2020-12-22 07:21:15,431 INFO L78 Accepts]: Start accepts. Automaton has 181977 states and 276229 transitions. Word has length 78 [2020-12-22 07:21:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:15,431 INFO L481 AbstractCegarLoop]: Abstraction has 181977 states and 276229 transitions. [2020-12-22 07:21:15,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 181977 states and 276229 transitions. [2020-12-22 07:21:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:21:15,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:15,435 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 07:21:15,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:21:15,435 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:15,436 INFO L82 PathProgramCache]: Analyzing trace with hash 120131000, now seen corresponding path program 1 times [2020-12-22 07:21:15,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:15,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195340086] [2020-12-22 07:21:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:15,525 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 07:21:15,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195340086] [2020-12-22 07:21:15,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:15,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:15,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079066477] [2020-12-22 07:21:15,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:15,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:15,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:15,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:15,527 INFO L87 Difference]: Start difference. First operand 181977 states and 276229 transitions. Second operand 4 states. [2020-12-22 07:21:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:30,362 INFO L93 Difference]: Finished difference Result 538997 states and 817551 transitions. [2020-12-22 07:21:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:30,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:21:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:31,408 INFO L225 Difference]: With dead ends: 538997 [2020-12-22 07:21:31,408 INFO L226 Difference]: Without dead ends: 357179 [2020-12-22 07:21:31,594 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 07:21:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357179 states. [2020-12-22 07:21:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357179 to 357177. [2020-12-22 07:21:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357177 states. [2020-12-22 07:21:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357177 states to 357177 states and 537493 transitions. [2020-12-22 07:21:49,024 INFO L78 Accepts]: Start accepts. Automaton has 357177 states and 537493 transitions. Word has length 78 [2020-12-22 07:21:49,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:49,025 INFO L481 AbstractCegarLoop]: Abstraction has 357177 states and 537493 transitions. [2020-12-22 07:21:49,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 357177 states and 537493 transitions. [2020-12-22 07:21:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:21:49,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:49,030 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 07:21:49,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:21:49,030 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1883818476, now seen corresponding path program 1 times [2020-12-22 07:21:49,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:49,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457914909] [2020-12-22 07:21:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:49,624 WARN L197 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-12-22 07:21:49,640 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 07:21:49,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457914909] [2020-12-22 07:21:49,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:49,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:49,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98047610] [2020-12-22 07:21:49,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:49,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:49,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:49,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:49,643 INFO L87 Difference]: Start difference. First operand 357177 states and 537493 transitions. Second operand 3 states. [2020-12-22 07:22:18,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:18,317 INFO L93 Difference]: Finished difference Result 1070237 states and 1610887 transitions. [2020-12-22 07:22:18,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:18,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:22:18,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:20,235 INFO L225 Difference]: With dead ends: 1070237 [2020-12-22 07:22:20,235 INFO L226 Difference]: Without dead ends: 714123 [2020-12-22 07:22:20,598 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 07:22:21,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714123 states. [2020-12-22 07:22:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714123 to 357209. [2020-12-22 07:22:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357209 states. [2020-12-22 07:22:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357209 states to 357209 states and 537525 transitions. [2020-12-22 07:22:47,590 INFO L78 Accepts]: Start accepts. Automaton has 357209 states and 537525 transitions. Word has length 79 [2020-12-22 07:22:47,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:47,591 INFO L481 AbstractCegarLoop]: Abstraction has 357209 states and 537525 transitions. [2020-12-22 07:22:47,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 357209 states and 537525 transitions. [2020-12-22 07:22:47,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:22:47,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:47,615 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 07:22:47,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:22:47,616 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:47,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:47,619 INFO L82 PathProgramCache]: Analyzing trace with hash 809988221, now seen corresponding path program 1 times [2020-12-22 07:22:47,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:47,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853318361] [2020-12-22 07:22:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:47,768 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 07:22:47,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853318361] [2020-12-22 07:22:47,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:47,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:47,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266721614] [2020-12-22 07:22:47,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:47,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:47,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:47,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:47,772 INFO L87 Difference]: Start difference. First operand 357209 states and 537525 transitions. Second operand 4 states. [2020-12-22 07:23:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:20,203 INFO L93 Difference]: Finished difference Result 1057200 states and 1589203 transitions. [2020-12-22 07:23:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:20,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 07:23:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:22,297 INFO L225 Difference]: With dead ends: 1057200 [2020-12-22 07:23:22,297 INFO L226 Difference]: Without dead ends: 700242 [2020-12-22 07:23:22,720 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 07:23:23,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700242 states.