/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/systemc/token_ring.10.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:10:28,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:10:28,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:10:28,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:10:28,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:10:28,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:10:28,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:10:28,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:10:28,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:10:28,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:10:28,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:10:28,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:10:28,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:10:28,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:10:28,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:10:28,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:10:28,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:10:28,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:10:28,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:10:28,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:10:28,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:10:28,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:10:28,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:10:28,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:10:28,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:10:28,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:10:28,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:10:28,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:10:28,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:10:28,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:10:28,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:10:28,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:10:28,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:10:28,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:10:28,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:10:28,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:10:28,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:10:28,611 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:10:28,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:10:28,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:10:28,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:10:28,613 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:10:28,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:10:28,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:10:28,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:10:28,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:10:28,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:10:28,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:10:28,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:10:28,615 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:10:28,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:10:28,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:10:28,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:10:28,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:10:28,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:10:28,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:10:28,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:10:28,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:10:28,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:10:28,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:10:28,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:10:28,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:10:28,617 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:10:28,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:10:29,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:10:29,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:10:29,022 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:10:29,023 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:10:29,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.10.cil-1.c [2020-12-22 07:10:29,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf61ac9e2/5bddef953e854032aa61632ac7990e74/FLAG44e52909c [2020-12-22 07:10:29,903 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:10:29,903 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.10.cil-1.c [2020-12-22 07:10:29,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf61ac9e2/5bddef953e854032aa61632ac7990e74/FLAG44e52909c [2020-12-22 07:10:30,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf61ac9e2/5bddef953e854032aa61632ac7990e74 [2020-12-22 07:10:30,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:10:30,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:10:30,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:30,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:10:30,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:10:30,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:30" (1/1) ... [2020-12-22 07:10:30,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0a1bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30, skipping insertion in model container [2020-12-22 07:10:30,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:10:30" (1/1) ... [2020-12-22 07:10:30,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:10:30,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:10:30,421 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.10.cil-1.c[366,379] [2020-12-22 07:10:30,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:30,571 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:10:30,585 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.10.cil-1.c[366,379] [2020-12-22 07:10:30,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:10:30,779 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:10:30,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30 WrapperNode [2020-12-22 07:10:30,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:10:30,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:30,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:10:30,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:10:30,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30" (1/1) ... [2020-12-22 07:10:30,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30" (1/1) ... [2020-12-22 07:10:31,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:10:31,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:10:31,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:10:31,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:10:31,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30" (1/1) ... [2020-12-22 07:10:31,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30" (1/1) ... [2020-12-22 07:10:31,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30" (1/1) ... [2020-12-22 07:10:31,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30" (1/1) ... [2020-12-22 07:10:31,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30" (1/1) ... [2020-12-22 07:10:31,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30" (1/1) ... [2020-12-22 07:10:31,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30" (1/1) ... [2020-12-22 07:10:31,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:10:31,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:10:31,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:10:31,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:10:31,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30" (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 07:10:31,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:10:31,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:10:31,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:10:31,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:10:33,756 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:10:33,756 INFO L299 CfgBuilder]: Removed 433 assume(true) statements. [2020-12-22 07:10:33,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:33 BoogieIcfgContainer [2020-12-22 07:10:33,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:10:33,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:10:33,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:10:33,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:10:33,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:10:30" (1/3) ... [2020-12-22 07:10:33,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648fd6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:33, skipping insertion in model container [2020-12-22 07:10:33,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:10:30" (2/3) ... [2020-12-22 07:10:33,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648fd6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:10:33, skipping insertion in model container [2020-12-22 07:10:33,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:10:33" (3/3) ... [2020-12-22 07:10:33,771 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.10.cil-1.c [2020-12-22 07:10:33,778 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:10:33,784 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 07:10:33,804 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 07:10:33,843 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:10:33,843 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:10:33,843 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:10:33,843 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:10:33,843 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:10:33,843 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:10:33,844 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:10:33,844 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:10:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states. [2020-12-22 07:10:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:33,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:33,898 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:33,898 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:33,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:33,905 INFO L82 PathProgramCache]: Analyzing trace with hash -734508672, now seen corresponding path program 1 times [2020-12-22 07:10:33,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:33,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67582941] [2020-12-22 07:10:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:34,255 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 07:10:34,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67582941] [2020-12-22 07:10:34,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:34,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:34,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134751517] [2020-12-22 07:10:34,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:34,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:34,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:34,289 INFO L87 Difference]: Start difference. First operand 1345 states. Second operand 3 states. [2020-12-22 07:10:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:34,459 INFO L93 Difference]: Finished difference Result 2685 states and 4073 transitions. [2020-12-22 07:10:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:34,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:34,499 INFO L225 Difference]: With dead ends: 2685 [2020-12-22 07:10:34,500 INFO L226 Difference]: Without dead ends: 1341 [2020-12-22 07:10:34,515 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 07:10:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2020-12-22 07:10:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1341. [2020-12-22 07:10:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1341 states. [2020-12-22 07:10:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2007 transitions. [2020-12-22 07:10:34,672 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2007 transitions. Word has length 138 [2020-12-22 07:10:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:34,673 INFO L481 AbstractCegarLoop]: Abstraction has 1341 states and 2007 transitions. [2020-12-22 07:10:34,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:34,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2007 transitions. [2020-12-22 07:10:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:34,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:34,687 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:34,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:10:34,688 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:34,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:34,689 INFO L82 PathProgramCache]: Analyzing trace with hash 882931778, now seen corresponding path program 1 times [2020-12-22 07:10:34,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:34,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942792975] [2020-12-22 07:10:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:34,864 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 07:10:34,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942792975] [2020-12-22 07:10:34,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:34,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:34,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880907607] [2020-12-22 07:10:34,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:34,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:34,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:34,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:34,869 INFO L87 Difference]: Start difference. First operand 1341 states and 2007 transitions. Second operand 3 states. [2020-12-22 07:10:34,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:34,971 INFO L93 Difference]: Finished difference Result 2669 states and 3992 transitions. [2020-12-22 07:10:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:34,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:34,982 INFO L225 Difference]: With dead ends: 2669 [2020-12-22 07:10:34,982 INFO L226 Difference]: Without dead ends: 1341 [2020-12-22 07:10:34,986 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 07:10:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2020-12-22 07:10:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1341. [2020-12-22 07:10:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1341 states. [2020-12-22 07:10:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2006 transitions. [2020-12-22 07:10:35,050 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2006 transitions. Word has length 138 [2020-12-22 07:10:35,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:35,052 INFO L481 AbstractCegarLoop]: Abstraction has 1341 states and 2006 transitions. [2020-12-22 07:10:35,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2006 transitions. [2020-12-22 07:10:35,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:35,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:35,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:35,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:10:35,056 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:35,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:35,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1312590084, now seen corresponding path program 1 times [2020-12-22 07:10:35,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:35,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594634549] [2020-12-22 07:10:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:35,218 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 07:10:35,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594634549] [2020-12-22 07:10:35,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:35,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:35,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723776362] [2020-12-22 07:10:35,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:35,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:35,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:35,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:35,222 INFO L87 Difference]: Start difference. First operand 1341 states and 2006 transitions. Second operand 3 states. [2020-12-22 07:10:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:35,391 INFO L93 Difference]: Finished difference Result 3795 states and 5660 transitions. [2020-12-22 07:10:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:35,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:35,407 INFO L225 Difference]: With dead ends: 3795 [2020-12-22 07:10:35,407 INFO L226 Difference]: Without dead ends: 2469 [2020-12-22 07:10:35,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:10:35,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2020-12-22 07:10:35,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2465. [2020-12-22 07:10:35,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3673 transitions. [2020-12-22 07:10:35,537 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3673 transitions. Word has length 138 [2020-12-22 07:10:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:35,543 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3673 transitions. [2020-12-22 07:10:35,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:35,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3673 transitions. [2020-12-22 07:10:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:35,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:35,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:35,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:10:35,548 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:35,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:35,550 INFO L82 PathProgramCache]: Analyzing trace with hash -2035339326, now seen corresponding path program 1 times [2020-12-22 07:10:35,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:35,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895489509] [2020-12-22 07:10:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:35,707 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 07:10:35,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895489509] [2020-12-22 07:10:35,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:35,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:35,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727773142] [2020-12-22 07:10:35,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:35,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:35,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:35,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:35,715 INFO L87 Difference]: Start difference. First operand 2465 states and 3673 transitions. Second operand 4 states. [2020-12-22 07:10:35,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:35,995 INFO L93 Difference]: Finished difference Result 6041 states and 8989 transitions. [2020-12-22 07:10:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:35,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:36,022 INFO L225 Difference]: With dead ends: 6041 [2020-12-22 07:10:36,022 INFO L226 Difference]: Without dead ends: 3592 [2020-12-22 07:10:36,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:36,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2020-12-22 07:10:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 2465. [2020-12-22 07:10:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3670 transitions. [2020-12-22 07:10:36,196 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3670 transitions. Word has length 138 [2020-12-22 07:10:36,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:36,197 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3670 transitions. [2020-12-22 07:10:36,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3670 transitions. [2020-12-22 07:10:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:36,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:36,201 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:36,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:10:36,202 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:36,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:36,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1173505724, now seen corresponding path program 1 times [2020-12-22 07:10:36,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:36,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713624215] [2020-12-22 07:10:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:36,284 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 07:10:36,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713624215] [2020-12-22 07:10:36,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:36,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:36,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840685623] [2020-12-22 07:10:36,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:36,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:36,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:36,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:36,287 INFO L87 Difference]: Start difference. First operand 2465 states and 3670 transitions. Second operand 4 states. [2020-12-22 07:10:36,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:36,653 INFO L93 Difference]: Finished difference Result 6039 states and 8979 transitions. [2020-12-22 07:10:36,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:36,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:36,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:36,675 INFO L225 Difference]: With dead ends: 6039 [2020-12-22 07:10:36,675 INFO L226 Difference]: Without dead ends: 3591 [2020-12-22 07:10:36,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2020-12-22 07:10:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 2465. [2020-12-22 07:10:36,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3667 transitions. [2020-12-22 07:10:36,852 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3667 transitions. Word has length 138 [2020-12-22 07:10:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:36,852 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3667 transitions. [2020-12-22 07:10:36,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3667 transitions. [2020-12-22 07:10:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:36,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:36,855 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:36,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:10:36,855 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1071052674, now seen corresponding path program 1 times [2020-12-22 07:10:36,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:36,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485901875] [2020-12-22 07:10:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:36,959 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 07:10:36,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485901875] [2020-12-22 07:10:36,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:36,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:36,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004772023] [2020-12-22 07:10:36,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:36,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:36,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:36,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:36,963 INFO L87 Difference]: Start difference. First operand 2465 states and 3667 transitions. Second operand 4 states. [2020-12-22 07:10:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:37,255 INFO L93 Difference]: Finished difference Result 6037 states and 8969 transitions. [2020-12-22 07:10:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:37,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:37,274 INFO L225 Difference]: With dead ends: 6037 [2020-12-22 07:10:37,274 INFO L226 Difference]: Without dead ends: 3590 [2020-12-22 07:10:37,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2020-12-22 07:10:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 2465. [2020-12-22 07:10:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3664 transitions. [2020-12-22 07:10:37,464 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3664 transitions. Word has length 138 [2020-12-22 07:10:37,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:37,464 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3664 transitions. [2020-12-22 07:10:37,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:37,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3664 transitions. [2020-12-22 07:10:37,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:37,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:37,466 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:37,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:10:37,466 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:37,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:37,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1559099780, now seen corresponding path program 1 times [2020-12-22 07:10:37,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:37,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513492017] [2020-12-22 07:10:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:37,524 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 07:10:37,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513492017] [2020-12-22 07:10:37,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:37,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:37,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31343585] [2020-12-22 07:10:37,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:37,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:37,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:37,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:37,527 INFO L87 Difference]: Start difference. First operand 2465 states and 3664 transitions. Second operand 3 states. [2020-12-22 07:10:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:37,689 INFO L93 Difference]: Finished difference Result 4911 states and 7299 transitions. [2020-12-22 07:10:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:37,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:37,702 INFO L225 Difference]: With dead ends: 4911 [2020-12-22 07:10:37,702 INFO L226 Difference]: Without dead ends: 2465 [2020-12-22 07:10:37,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:10:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2020-12-22 07:10:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2465. [2020-12-22 07:10:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3656 transitions. [2020-12-22 07:10:37,854 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3656 transitions. Word has length 138 [2020-12-22 07:10:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:37,854 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3656 transitions. [2020-12-22 07:10:37,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:37,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3656 transitions. [2020-12-22 07:10:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:37,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:37,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:37,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:10:37,857 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 741224192, now seen corresponding path program 1 times [2020-12-22 07:10:37,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:37,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103987110] [2020-12-22 07:10:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:37,971 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 07:10:37,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103987110] [2020-12-22 07:10:37,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:37,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:37,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547150009] [2020-12-22 07:10:37,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:37,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:37,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:37,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:37,975 INFO L87 Difference]: Start difference. First operand 2465 states and 3656 transitions. Second operand 3 states. [2020-12-22 07:10:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:38,155 INFO L93 Difference]: Finished difference Result 4910 states and 7282 transitions. [2020-12-22 07:10:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:38,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:38,170 INFO L225 Difference]: With dead ends: 4910 [2020-12-22 07:10:38,170 INFO L226 Difference]: Without dead ends: 2465 [2020-12-22 07:10:38,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:10:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2020-12-22 07:10:38,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2465. [2020-12-22 07:10:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:38,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3648 transitions. [2020-12-22 07:10:38,345 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3648 transitions. Word has length 138 [2020-12-22 07:10:38,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:38,345 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3648 transitions. [2020-12-22 07:10:38,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3648 transitions. [2020-12-22 07:10:38,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:38,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:38,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:38,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:10:38,348 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:38,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:38,349 INFO L82 PathProgramCache]: Analyzing trace with hash 160651780, now seen corresponding path program 1 times [2020-12-22 07:10:38,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:38,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004281571] [2020-12-22 07:10:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:38,415 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 07:10:38,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004281571] [2020-12-22 07:10:38,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:38,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:38,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300364987] [2020-12-22 07:10:38,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:38,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:38,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:38,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:38,423 INFO L87 Difference]: Start difference. First operand 2465 states and 3648 transitions. Second operand 4 states. [2020-12-22 07:10:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:38,689 INFO L93 Difference]: Finished difference Result 6029 states and 8913 transitions. [2020-12-22 07:10:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:38,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:38,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:38,730 INFO L225 Difference]: With dead ends: 6029 [2020-12-22 07:10:38,731 INFO L226 Difference]: Without dead ends: 3586 [2020-12-22 07:10:38,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:38,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2020-12-22 07:10:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 2465. [2020-12-22 07:10:38,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3645 transitions. [2020-12-22 07:10:38,906 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3645 transitions. Word has length 138 [2020-12-22 07:10:38,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:38,906 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3645 transitions. [2020-12-22 07:10:38,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3645 transitions. [2020-12-22 07:10:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:38,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:38,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:38,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:10:38,909 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:38,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1561350906, now seen corresponding path program 1 times [2020-12-22 07:10:38,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:38,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605175631] [2020-12-22 07:10:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:38,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605175631] [2020-12-22 07:10:38,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:38,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:38,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779657831] [2020-12-22 07:10:38,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:38,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:38,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:38,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:38,964 INFO L87 Difference]: Start difference. First operand 2465 states and 3645 transitions. Second operand 4 states. [2020-12-22 07:10:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:39,237 INFO L93 Difference]: Finished difference Result 6027 states and 8903 transitions. [2020-12-22 07:10:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:39,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:39,250 INFO L225 Difference]: With dead ends: 6027 [2020-12-22 07:10:39,251 INFO L226 Difference]: Without dead ends: 3585 [2020-12-22 07:10:39,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2020-12-22 07:10:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2465. [2020-12-22 07:10:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3642 transitions. [2020-12-22 07:10:39,432 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3642 transitions. Word has length 138 [2020-12-22 07:10:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:39,432 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3642 transitions. [2020-12-22 07:10:39,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:39,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3642 transitions. [2020-12-22 07:10:39,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:39,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:39,435 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:39,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:10:39,435 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:39,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1893994044, now seen corresponding path program 1 times [2020-12-22 07:10:39,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:39,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186657337] [2020-12-22 07:10:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:39,520 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 07:10:39,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186657337] [2020-12-22 07:10:39,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:39,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:39,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430403107] [2020-12-22 07:10:39,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:39,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:39,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:39,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:39,525 INFO L87 Difference]: Start difference. First operand 2465 states and 3642 transitions. Second operand 4 states. [2020-12-22 07:10:39,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:39,845 INFO L93 Difference]: Finished difference Result 6025 states and 8893 transitions. [2020-12-22 07:10:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:39,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:39,858 INFO L225 Difference]: With dead ends: 6025 [2020-12-22 07:10:39,858 INFO L226 Difference]: Without dead ends: 3584 [2020-12-22 07:10:39,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:39,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2020-12-22 07:10:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2465. [2020-12-22 07:10:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3639 transitions. [2020-12-22 07:10:40,068 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3639 transitions. Word has length 138 [2020-12-22 07:10:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:40,068 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3639 transitions. [2020-12-22 07:10:40,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:40,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3639 transitions. [2020-12-22 07:10:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:40,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:40,070 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:40,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:10:40,071 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:40,078 INFO L82 PathProgramCache]: Analyzing trace with hash 34938182, now seen corresponding path program 1 times [2020-12-22 07:10:40,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:40,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188008640] [2020-12-22 07:10:40,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:40,145 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 07:10:40,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188008640] [2020-12-22 07:10:40,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:40,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:40,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956635221] [2020-12-22 07:10:40,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:40,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:40,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:40,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:40,149 INFO L87 Difference]: Start difference. First operand 2465 states and 3639 transitions. Second operand 3 states. [2020-12-22 07:10:40,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:40,332 INFO L93 Difference]: Finished difference Result 4905 states and 7242 transitions. [2020-12-22 07:10:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:40,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:40,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:40,339 INFO L225 Difference]: With dead ends: 4905 [2020-12-22 07:10:40,340 INFO L226 Difference]: Without dead ends: 2465 [2020-12-22 07:10:40,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:10:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2020-12-22 07:10:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2465. [2020-12-22 07:10:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3631 transitions. [2020-12-22 07:10:40,507 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3631 transitions. Word has length 138 [2020-12-22 07:10:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:40,508 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3631 transitions. [2020-12-22 07:10:40,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3631 transitions. [2020-12-22 07:10:40,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:40,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:40,510 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:40,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:10:40,510 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:40,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:40,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2098864066, now seen corresponding path program 1 times [2020-12-22 07:10:40,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:40,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998999766] [2020-12-22 07:10:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:40,575 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 07:10:40,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998999766] [2020-12-22 07:10:40,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:40,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:40,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470486012] [2020-12-22 07:10:40,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:40,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:40,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:40,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:40,579 INFO L87 Difference]: Start difference. First operand 2465 states and 3631 transitions. Second operand 4 states. [2020-12-22 07:10:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:40,942 INFO L93 Difference]: Finished difference Result 5944 states and 8752 transitions. [2020-12-22 07:10:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:40,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:40,951 INFO L225 Difference]: With dead ends: 5944 [2020-12-22 07:10:40,951 INFO L226 Difference]: Without dead ends: 3505 [2020-12-22 07:10:40,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2020-12-22 07:10:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 2465. [2020-12-22 07:10:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3628 transitions. [2020-12-22 07:10:41,203 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3628 transitions. Word has length 138 [2020-12-22 07:10:41,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:41,204 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3628 transitions. [2020-12-22 07:10:41,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:41,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3628 transitions. [2020-12-22 07:10:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:41,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:41,207 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:41,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:10:41,207 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:41,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:41,208 INFO L82 PathProgramCache]: Analyzing trace with hash -468958268, now seen corresponding path program 1 times [2020-12-22 07:10:41,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:41,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689001210] [2020-12-22 07:10:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:41,280 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 07:10:41,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689001210] [2020-12-22 07:10:41,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:41,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:41,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481971709] [2020-12-22 07:10:41,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:41,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:41,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:41,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:41,283 INFO L87 Difference]: Start difference. First operand 2465 states and 3628 transitions. Second operand 4 states. [2020-12-22 07:10:41,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:41,681 INFO L93 Difference]: Finished difference Result 5942 states and 8742 transitions. [2020-12-22 07:10:41,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:41,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:41,692 INFO L225 Difference]: With dead ends: 5942 [2020-12-22 07:10:41,692 INFO L226 Difference]: Without dead ends: 3504 [2020-12-22 07:10:41,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2020-12-22 07:10:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 2465. [2020-12-22 07:10:41,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3625 transitions. [2020-12-22 07:10:41,886 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3625 transitions. Word has length 138 [2020-12-22 07:10:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:41,887 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3625 transitions. [2020-12-22 07:10:41,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3625 transitions. [2020-12-22 07:10:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:41,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:41,890 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:41,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:10:41,890 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:41,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2398082, now seen corresponding path program 1 times [2020-12-22 07:10:41,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:41,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101883276] [2020-12-22 07:10:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:41,967 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 07:10:41,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101883276] [2020-12-22 07:10:41,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:41,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:41,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435474515] [2020-12-22 07:10:41,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:41,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:41,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:41,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:41,970 INFO L87 Difference]: Start difference. First operand 2465 states and 3625 transitions. Second operand 3 states. [2020-12-22 07:10:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:42,205 INFO L93 Difference]: Finished difference Result 4902 states and 7211 transitions. [2020-12-22 07:10:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:42,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:42,212 INFO L225 Difference]: With dead ends: 4902 [2020-12-22 07:10:42,214 INFO L226 Difference]: Without dead ends: 2465 [2020-12-22 07:10:42,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:10:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2020-12-22 07:10:42,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2465. [2020-12-22 07:10:42,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:42,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3593 transitions. [2020-12-22 07:10:42,401 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3593 transitions. Word has length 138 [2020-12-22 07:10:42,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:42,402 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3593 transitions. [2020-12-22 07:10:42,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3593 transitions. [2020-12-22 07:10:42,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:42,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:42,404 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:42,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:10:42,404 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:42,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash 844564102, now seen corresponding path program 1 times [2020-12-22 07:10:42,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:42,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000664349] [2020-12-22 07:10:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:42,470 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 07:10:42,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000664349] [2020-12-22 07:10:42,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:42,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:42,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902991324] [2020-12-22 07:10:42,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:42,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:42,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:42,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:42,476 INFO L87 Difference]: Start difference. First operand 2465 states and 3593 transitions. Second operand 4 states. [2020-12-22 07:10:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:42,847 INFO L93 Difference]: Finished difference Result 5936 states and 8649 transitions. [2020-12-22 07:10:42,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:42,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:42,855 INFO L225 Difference]: With dead ends: 5936 [2020-12-22 07:10:42,856 INFO L226 Difference]: Without dead ends: 3501 [2020-12-22 07:10:42,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2020-12-22 07:10:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 2465. [2020-12-22 07:10:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:43,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3590 transitions. [2020-12-22 07:10:43,070 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3590 transitions. Word has length 138 [2020-12-22 07:10:43,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:43,071 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3590 transitions. [2020-12-22 07:10:43,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:43,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3590 transitions. [2020-12-22 07:10:43,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:43,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:43,073 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:43,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:10:43,074 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:43,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:43,074 INFO L82 PathProgramCache]: Analyzing trace with hash -194020472, now seen corresponding path program 1 times [2020-12-22 07:10:43,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:43,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149158835] [2020-12-22 07:10:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:43,132 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 07:10:43,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149158835] [2020-12-22 07:10:43,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:43,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:43,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80281993] [2020-12-22 07:10:43,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:43,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:43,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:43,134 INFO L87 Difference]: Start difference. First operand 2465 states and 3590 transitions. Second operand 4 states. [2020-12-22 07:10:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:43,517 INFO L93 Difference]: Finished difference Result 5934 states and 8639 transitions. [2020-12-22 07:10:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:43,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:43,526 INFO L225 Difference]: With dead ends: 5934 [2020-12-22 07:10:43,526 INFO L226 Difference]: Without dead ends: 3500 [2020-12-22 07:10:43,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2020-12-22 07:10:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2465. [2020-12-22 07:10:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3587 transitions. [2020-12-22 07:10:43,746 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3587 transitions. Word has length 138 [2020-12-22 07:10:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:43,746 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3587 transitions. [2020-12-22 07:10:43,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3587 transitions. [2020-12-22 07:10:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:43,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:43,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:43,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:10:43,748 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2127781446, now seen corresponding path program 1 times [2020-12-22 07:10:43,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:43,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397738346] [2020-12-22 07:10:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:43,806 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 07:10:43,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397738346] [2020-12-22 07:10:43,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:43,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:43,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565441571] [2020-12-22 07:10:43,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:43,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:43,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:43,808 INFO L87 Difference]: Start difference. First operand 2465 states and 3587 transitions. Second operand 4 states. [2020-12-22 07:10:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:44,217 INFO L93 Difference]: Finished difference Result 5932 states and 8629 transitions. [2020-12-22 07:10:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:44,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:44,226 INFO L225 Difference]: With dead ends: 5932 [2020-12-22 07:10:44,227 INFO L226 Difference]: Without dead ends: 3499 [2020-12-22 07:10:44,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3499 states. [2020-12-22 07:10:44,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3499 to 2465. [2020-12-22 07:10:44,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3584 transitions. [2020-12-22 07:10:44,438 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3584 transitions. Word has length 138 [2020-12-22 07:10:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:44,438 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3584 transitions. [2020-12-22 07:10:44,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3584 transitions. [2020-12-22 07:10:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:44,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:44,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:44,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:10:44,441 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:44,445 INFO L82 PathProgramCache]: Analyzing trace with hash -14079032, now seen corresponding path program 1 times [2020-12-22 07:10:44,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:44,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849222050] [2020-12-22 07:10:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:44,552 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 07:10:44,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849222050] [2020-12-22 07:10:44,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:44,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:44,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680338256] [2020-12-22 07:10:44,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:44,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:44,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:44,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:44,557 INFO L87 Difference]: Start difference. First operand 2465 states and 3584 transitions. Second operand 4 states. [2020-12-22 07:10:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:45,058 INFO L93 Difference]: Finished difference Result 5930 states and 8619 transitions. [2020-12-22 07:10:45,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:45,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:45,068 INFO L225 Difference]: With dead ends: 5930 [2020-12-22 07:10:45,068 INFO L226 Difference]: Without dead ends: 3498 [2020-12-22 07:10:45,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2020-12-22 07:10:45,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 2465. [2020-12-22 07:10:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3581 transitions. [2020-12-22 07:10:45,285 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3581 transitions. Word has length 138 [2020-12-22 07:10:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:45,286 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3581 transitions. [2020-12-22 07:10:45,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3581 transitions. [2020-12-22 07:10:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:45,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:45,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:45,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:10:45,288 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:45,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:45,289 INFO L82 PathProgramCache]: Analyzing trace with hash -637360634, now seen corresponding path program 1 times [2020-12-22 07:10:45,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:45,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910324792] [2020-12-22 07:10:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:45,349 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 07:10:45,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910324792] [2020-12-22 07:10:45,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:45,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:45,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854978769] [2020-12-22 07:10:45,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:45,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:45,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:45,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:45,352 INFO L87 Difference]: Start difference. First operand 2465 states and 3581 transitions. Second operand 4 states. [2020-12-22 07:10:45,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:45,795 INFO L93 Difference]: Finished difference Result 5928 states and 8609 transitions. [2020-12-22 07:10:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:45,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:45,803 INFO L225 Difference]: With dead ends: 5928 [2020-12-22 07:10:45,803 INFO L226 Difference]: Without dead ends: 3497 [2020-12-22 07:10:45,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3497 states. [2020-12-22 07:10:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3497 to 2465. [2020-12-22 07:10:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3578 transitions. [2020-12-22 07:10:46,013 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3578 transitions. Word has length 138 [2020-12-22 07:10:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:46,013 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3578 transitions. [2020-12-22 07:10:46,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3578 transitions. [2020-12-22 07:10:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:46,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:46,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:46,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:10:46,016 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:46,016 INFO L82 PathProgramCache]: Analyzing trace with hash -518919160, now seen corresponding path program 1 times [2020-12-22 07:10:46,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:46,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008931288] [2020-12-22 07:10:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:46,075 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 07:10:46,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008931288] [2020-12-22 07:10:46,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:46,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:46,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457033888] [2020-12-22 07:10:46,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:46,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:46,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:46,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:46,079 INFO L87 Difference]: Start difference. First operand 2465 states and 3578 transitions. Second operand 4 states. [2020-12-22 07:10:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:46,530 INFO L93 Difference]: Finished difference Result 5926 states and 8599 transitions. [2020-12-22 07:10:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:46,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:46,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:46,539 INFO L225 Difference]: With dead ends: 5926 [2020-12-22 07:10:46,539 INFO L226 Difference]: Without dead ends: 3496 [2020-12-22 07:10:46,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2020-12-22 07:10:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 2465. [2020-12-22 07:10:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3575 transitions. [2020-12-22 07:10:46,769 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3575 transitions. Word has length 138 [2020-12-22 07:10:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:46,769 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3575 transitions. [2020-12-22 07:10:46,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3575 transitions. [2020-12-22 07:10:46,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:46,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:46,776 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:46,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:10:46,777 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:46,777 INFO L82 PathProgramCache]: Analyzing trace with hash 870374854, now seen corresponding path program 1 times [2020-12-22 07:10:46,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:46,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198406535] [2020-12-22 07:10:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:46,830 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 07:10:46,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198406535] [2020-12-22 07:10:46,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:46,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:46,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049135254] [2020-12-22 07:10:46,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:46,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:46,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:46,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:46,832 INFO L87 Difference]: Start difference. First operand 2465 states and 3575 transitions. Second operand 4 states. [2020-12-22 07:10:47,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:47,233 INFO L93 Difference]: Finished difference Result 5924 states and 8589 transitions. [2020-12-22 07:10:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:47,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:10:47,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:47,243 INFO L225 Difference]: With dead ends: 5924 [2020-12-22 07:10:47,243 INFO L226 Difference]: Without dead ends: 3495 [2020-12-22 07:10:47,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2020-12-22 07:10:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 2465. [2020-12-22 07:10:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2465 states. [2020-12-22 07:10:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3572 transitions. [2020-12-22 07:10:47,450 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3572 transitions. Word has length 138 [2020-12-22 07:10:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:47,450 INFO L481 AbstractCegarLoop]: Abstraction has 2465 states and 3572 transitions. [2020-12-22 07:10:47,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3572 transitions. [2020-12-22 07:10:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:10:47,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:47,452 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:47,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:10:47,453 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:47,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1163019192, now seen corresponding path program 1 times [2020-12-22 07:10:47,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:47,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198820608] [2020-12-22 07:10:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:47,533 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 07:10:47,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198820608] [2020-12-22 07:10:47,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:47,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:10:47,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185815773] [2020-12-22 07:10:47,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:47,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:47,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:47,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:47,538 INFO L87 Difference]: Start difference. First operand 2465 states and 3572 transitions. Second operand 3 states. [2020-12-22 07:10:47,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:47,841 INFO L93 Difference]: Finished difference Result 7178 states and 10389 transitions. [2020-12-22 07:10:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:47,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 07:10:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:47,852 INFO L225 Difference]: With dead ends: 7178 [2020-12-22 07:10:47,852 INFO L226 Difference]: Without dead ends: 4751 [2020-12-22 07:10:47,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:10:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2020-12-22 07:10:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 4601. [2020-12-22 07:10:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4601 states. [2020-12-22 07:10:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 6629 transitions. [2020-12-22 07:10:48,233 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 6629 transitions. Word has length 138 [2020-12-22 07:10:48,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:48,233 INFO L481 AbstractCegarLoop]: Abstraction has 4601 states and 6629 transitions. [2020-12-22 07:10:48,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:48,233 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 6629 transitions. [2020-12-22 07:10:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:10:48,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:48,238 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:48,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:10:48,239 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:48,240 INFO L82 PathProgramCache]: Analyzing trace with hash 92158667, now seen corresponding path program 1 times [2020-12-22 07:10:48,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:48,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835432578] [2020-12-22 07:10:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:10:48,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835432578] [2020-12-22 07:10:48,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:48,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:48,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726898761] [2020-12-22 07:10:48,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:48,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:48,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:48,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:48,358 INFO L87 Difference]: Start difference. First operand 4601 states and 6629 transitions. Second operand 5 states. [2020-12-22 07:10:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:49,567 INFO L93 Difference]: Finished difference Result 13603 states and 19616 transitions. [2020-12-22 07:10:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:10:49,567 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:10:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:49,588 INFO L225 Difference]: With dead ends: 13603 [2020-12-22 07:10:49,588 INFO L226 Difference]: Without dead ends: 9044 [2020-12-22 07:10:49,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:10:49,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9044 states. [2020-12-22 07:10:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9044 to 4676. [2020-12-22 07:10:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4676 states. [2020-12-22 07:10:50,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4676 states to 4676 states and 6680 transitions. [2020-12-22 07:10:50,041 INFO L78 Accepts]: Start accepts. Automaton has 4676 states and 6680 transitions. Word has length 225 [2020-12-22 07:10:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:50,042 INFO L481 AbstractCegarLoop]: Abstraction has 4676 states and 6680 transitions. [2020-12-22 07:10:50,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:10:50,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4676 states and 6680 transitions. [2020-12-22 07:10:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:10:50,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:50,047 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:50,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:10:50,047 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:50,048 INFO L82 PathProgramCache]: Analyzing trace with hash -263209657, now seen corresponding path program 1 times [2020-12-22 07:10:50,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:50,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352218635] [2020-12-22 07:10:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:10:50,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352218635] [2020-12-22 07:10:50,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:50,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:50,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045514237] [2020-12-22 07:10:50,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:50,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:50,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:50,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:50,129 INFO L87 Difference]: Start difference. First operand 4676 states and 6680 transitions. Second operand 4 states. [2020-12-22 07:10:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:51,195 INFO L93 Difference]: Finished difference Result 15871 states and 22630 transitions. [2020-12-22 07:10:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:51,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 07:10:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:51,223 INFO L225 Difference]: With dead ends: 15871 [2020-12-22 07:10:51,223 INFO L226 Difference]: Without dead ends: 11239 [2020-12-22 07:10:51,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11239 states. [2020-12-22 07:10:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11239 to 8845. [2020-12-22 07:10:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8845 states. [2020-12-22 07:10:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8845 states to 8845 states and 12578 transitions. [2020-12-22 07:10:51,938 INFO L78 Accepts]: Start accepts. Automaton has 8845 states and 12578 transitions. Word has length 225 [2020-12-22 07:10:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:51,938 INFO L481 AbstractCegarLoop]: Abstraction has 8845 states and 12578 transitions. [2020-12-22 07:10:51,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 8845 states and 12578 transitions. [2020-12-22 07:10:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:10:51,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:51,945 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:51,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:10:51,945 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:51,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:51,946 INFO L82 PathProgramCache]: Analyzing trace with hash 291204262, now seen corresponding path program 1 times [2020-12-22 07:10:51,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:51,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481531670] [2020-12-22 07:10:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:10:52,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481531670] [2020-12-22 07:10:52,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:52,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:52,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479260503] [2020-12-22 07:10:52,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:52,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:52,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:52,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:52,033 INFO L87 Difference]: Start difference. First operand 8845 states and 12578 transitions. Second operand 5 states. [2020-12-22 07:10:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:53,674 INFO L93 Difference]: Finished difference Result 25904 states and 36937 transitions. [2020-12-22 07:10:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:10:53,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:10:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:53,700 INFO L225 Difference]: With dead ends: 25904 [2020-12-22 07:10:53,700 INFO L226 Difference]: Without dead ends: 17107 [2020-12-22 07:10:53,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:10:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17107 states. [2020-12-22 07:10:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17107 to 8989. [2020-12-22 07:10:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8989 states. [2020-12-22 07:10:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8989 states to 8989 states and 12677 transitions. [2020-12-22 07:10:54,512 INFO L78 Accepts]: Start accepts. Automaton has 8989 states and 12677 transitions. Word has length 225 [2020-12-22 07:10:54,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:54,512 INFO L481 AbstractCegarLoop]: Abstraction has 8989 states and 12677 transitions. [2020-12-22 07:10:54,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:10:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 8989 states and 12677 transitions. [2020-12-22 07:10:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:10:54,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:54,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:54,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:10:54,521 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash -835748830, now seen corresponding path program 1 times [2020-12-22 07:10:54,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:54,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981318585] [2020-12-22 07:10:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:10:54,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981318585] [2020-12-22 07:10:54,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:54,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:54,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281018854] [2020-12-22 07:10:54,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:54,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:54,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:54,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:54,684 INFO L87 Difference]: Start difference. First operand 8989 states and 12677 transitions. Second operand 4 states. [2020-12-22 07:10:56,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:56,310 INFO L93 Difference]: Finished difference Result 30596 states and 43082 transitions. [2020-12-22 07:10:56,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:56,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 07:10:56,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:56,334 INFO L225 Difference]: With dead ends: 30596 [2020-12-22 07:10:56,334 INFO L226 Difference]: Without dead ends: 21664 [2020-12-22 07:10:56,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21664 states. [2020-12-22 07:10:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21664 to 17100. [2020-12-22 07:10:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17100 states. [2020-12-22 07:10:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17100 states to 17100 states and 24014 transitions. [2020-12-22 07:10:57,926 INFO L78 Accepts]: Start accepts. Automaton has 17100 states and 24014 transitions. Word has length 225 [2020-12-22 07:10:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:57,926 INFO L481 AbstractCegarLoop]: Abstraction has 17100 states and 24014 transitions. [2020-12-22 07:10:57,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:57,926 INFO L276 IsEmpty]: Start isEmpty. Operand 17100 states and 24014 transitions. [2020-12-22 07:10:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:10:57,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:57,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:57,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:10:57,939 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:57,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1531444735, now seen corresponding path program 1 times [2020-12-22 07:10:57,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:57,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593110492] [2020-12-22 07:10:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:10:58,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593110492] [2020-12-22 07:10:58,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:58,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:10:58,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769714037] [2020-12-22 07:10:58,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:10:58,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:58,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:10:58,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:58,042 INFO L87 Difference]: Start difference. First operand 17100 states and 24014 transitions. Second operand 5 states. [2020-12-22 07:11:00,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:00,492 INFO L93 Difference]: Finished difference Result 48887 states and 69033 transitions. [2020-12-22 07:11:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:00,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:11:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:00,529 INFO L225 Difference]: With dead ends: 48887 [2020-12-22 07:11:00,529 INFO L226 Difference]: Without dead ends: 31848 [2020-12-22 07:11:00,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31848 states. [2020-12-22 07:11:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31848 to 17376. [2020-12-22 07:11:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17376 states. [2020-12-22 07:11:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17376 states to 17376 states and 24205 transitions. [2020-12-22 07:11:02,056 INFO L78 Accepts]: Start accepts. Automaton has 17376 states and 24205 transitions. Word has length 225 [2020-12-22 07:11:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:02,057 INFO L481 AbstractCegarLoop]: Abstraction has 17376 states and 24205 transitions. [2020-12-22 07:11:02,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 17376 states and 24205 transitions. [2020-12-22 07:11:02,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:02,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:02,068 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:02,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:11:02,069 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1754633347, now seen corresponding path program 1 times [2020-12-22 07:11:02,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:02,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180029651] [2020-12-22 07:11:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:02,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180029651] [2020-12-22 07:11:02,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:02,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:02,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376976225] [2020-12-22 07:11:02,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:02,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:02,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:02,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:02,197 INFO L87 Difference]: Start difference. First operand 17376 states and 24205 transitions. Second operand 5 states. [2020-12-22 07:11:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:06,097 INFO L93 Difference]: Finished difference Result 62207 states and 87408 transitions. [2020-12-22 07:11:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:06,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:11:06,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:06,146 INFO L225 Difference]: With dead ends: 62207 [2020-12-22 07:11:06,146 INFO L226 Difference]: Without dead ends: 44899 [2020-12-22 07:11:06,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44899 states. [2020-12-22 07:11:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44899 to 17907. [2020-12-22 07:11:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17907 states. [2020-12-22 07:11:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17907 states to 17907 states and 24736 transitions. [2020-12-22 07:11:07,880 INFO L78 Accepts]: Start accepts. Automaton has 17907 states and 24736 transitions. Word has length 225 [2020-12-22 07:11:07,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:07,881 INFO L481 AbstractCegarLoop]: Abstraction has 17907 states and 24736 transitions. [2020-12-22 07:11:07,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:07,881 INFO L276 IsEmpty]: Start isEmpty. Operand 17907 states and 24736 transitions. [2020-12-22 07:11:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:07,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:07,888 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:07,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:11:07,889 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:07,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1754336059, now seen corresponding path program 1 times [2020-12-22 07:11:07,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:07,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579178663] [2020-12-22 07:11:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:08,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579178663] [2020-12-22 07:11:08,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:08,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:08,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439037115] [2020-12-22 07:11:08,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:08,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:08,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:08,014 INFO L87 Difference]: Start difference. First operand 17907 states and 24736 transitions. Second operand 4 states. [2020-12-22 07:11:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:12,365 INFO L93 Difference]: Finished difference Result 60900 states and 84006 transitions. [2020-12-22 07:11:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:12,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 07:11:12,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:12,421 INFO L225 Difference]: With dead ends: 60900 [2020-12-22 07:11:12,422 INFO L226 Difference]: Without dead ends: 43066 [2020-12-22 07:11:12,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:11:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43066 states. [2020-12-22 07:11:15,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43066 to 34138. [2020-12-22 07:11:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34138 states. [2020-12-22 07:11:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34138 states to 34138 states and 46969 transitions. [2020-12-22 07:11:15,530 INFO L78 Accepts]: Start accepts. Automaton has 34138 states and 46969 transitions. Word has length 225 [2020-12-22 07:11:15,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:15,530 INFO L481 AbstractCegarLoop]: Abstraction has 34138 states and 46969 transitions. [2020-12-22 07:11:15,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 34138 states and 46969 transitions. [2020-12-22 07:11:15,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:15,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:15,544 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:15,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:11:15,544 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:15,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:15,544 INFO L82 PathProgramCache]: Analyzing trace with hash 406323065, now seen corresponding path program 1 times [2020-12-22 07:11:15,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:15,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093674533] [2020-12-22 07:11:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:15,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093674533] [2020-12-22 07:11:15,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:15,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:15,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97717912] [2020-12-22 07:11:15,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:15,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:15,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:15,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:15,621 INFO L87 Difference]: Start difference. First operand 34138 states and 46969 transitions. Second operand 5 states. [2020-12-22 07:11:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:21,301 INFO L93 Difference]: Finished difference Result 94887 states and 131492 transitions. [2020-12-22 07:11:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:21,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:11:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:21,376 INFO L225 Difference]: With dead ends: 94887 [2020-12-22 07:11:21,376 INFO L226 Difference]: Without dead ends: 60826 [2020-12-22 07:11:21,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:21,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60826 states. [2020-12-22 07:11:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60826 to 34666. [2020-12-22 07:11:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34666 states. [2020-12-22 07:11:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34666 states to 34666 states and 47336 transitions. [2020-12-22 07:11:25,237 INFO L78 Accepts]: Start accepts. Automaton has 34666 states and 47336 transitions. Word has length 225 [2020-12-22 07:11:25,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:25,237 INFO L481 AbstractCegarLoop]: Abstraction has 34666 states and 47336 transitions. [2020-12-22 07:11:25,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:25,237 INFO L276 IsEmpty]: Start isEmpty. Operand 34666 states and 47336 transitions. [2020-12-22 07:11:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:25,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:25,249 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:25,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:11:25,250 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:25,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:25,251 INFO L82 PathProgramCache]: Analyzing trace with hash 671073013, now seen corresponding path program 1 times [2020-12-22 07:11:25,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:25,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418991598] [2020-12-22 07:11:25,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:25,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418991598] [2020-12-22 07:11:25,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:25,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:25,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82125346] [2020-12-22 07:11:25,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:25,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:25,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:25,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:25,333 INFO L87 Difference]: Start difference. First operand 34666 states and 47336 transitions. Second operand 5 states. [2020-12-22 07:11:33,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:33,646 INFO L93 Difference]: Finished difference Result 118783 states and 163919 transitions. [2020-12-22 07:11:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:11:33,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:11:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:33,753 INFO L225 Difference]: With dead ends: 118783 [2020-12-22 07:11:33,753 INFO L226 Difference]: Without dead ends: 84201 [2020-12-22 07:11:33,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:11:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84201 states. [2020-12-22 07:11:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84201 to 35677. [2020-12-22 07:11:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35677 states. [2020-12-22 07:11:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35677 states to 35677 states and 48347 transitions. [2020-12-22 07:11:38,016 INFO L78 Accepts]: Start accepts. Automaton has 35677 states and 48347 transitions. Word has length 225 [2020-12-22 07:11:38,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:38,016 INFO L481 AbstractCegarLoop]: Abstraction has 35677 states and 48347 transitions. [2020-12-22 07:11:38,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:11:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 35677 states and 48347 transitions. [2020-12-22 07:11:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:38,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:38,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:38,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 07:11:38,030 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:38,031 INFO L82 PathProgramCache]: Analyzing trace with hash 406425523, now seen corresponding path program 1 times [2020-12-22 07:11:38,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:38,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850419868] [2020-12-22 07:11:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:38,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850419868] [2020-12-22 07:11:38,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:38,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:38,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703849899] [2020-12-22 07:11:38,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:11:38,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:38,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:11:38,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:11:38,120 INFO L87 Difference]: Start difference. First operand 35677 states and 48347 transitions. Second operand 4 states. [2020-12-22 07:11:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:47,142 INFO L93 Difference]: Finished difference Result 121012 states and 163765 transitions. [2020-12-22 07:11:47,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:11:47,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 07:11:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:47,240 INFO L225 Difference]: With dead ends: 121012 [2020-12-22 07:11:47,240 INFO L226 Difference]: Without dead ends: 85424 [2020-12-22 07:11:47,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:11:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85424 states. [2020-12-22 07:11:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85424 to 68028. [2020-12-22 07:11:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68028 states. [2020-12-22 07:11:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68028 states to 68028 states and 91848 transitions. [2020-12-22 07:11:54,724 INFO L78 Accepts]: Start accepts. Automaton has 68028 states and 91848 transitions. Word has length 225 [2020-12-22 07:11:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:54,725 INFO L481 AbstractCegarLoop]: Abstraction has 68028 states and 91848 transitions. [2020-12-22 07:11:54,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:11:54,725 INFO L276 IsEmpty]: Start isEmpty. Operand 68028 states and 91848 transitions. [2020-12-22 07:11:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:11:54,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:54,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:54,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 07:11:54,750 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:54,750 INFO L82 PathProgramCache]: Analyzing trace with hash 158232817, now seen corresponding path program 1 times [2020-12-22 07:11:54,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:54,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472133678] [2020-12-22 07:11:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:11:54,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472133678] [2020-12-22 07:11:54,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:54,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:11:54,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126236696] [2020-12-22 07:11:54,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:11:54,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:54,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:11:54,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:11:54,856 INFO L87 Difference]: Start difference. First operand 68028 states and 91848 transitions. Second operand 5 states. [2020-12-22 07:12:07,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:07,501 INFO L93 Difference]: Finished difference Result 184051 states and 250419 transitions. [2020-12-22 07:12:07,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:07,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:12:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:07,652 INFO L225 Difference]: With dead ends: 184051 [2020-12-22 07:12:07,652 INFO L226 Difference]: Without dead ends: 116116 [2020-12-22 07:12:07,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:12:07,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116116 states. [2020-12-22 07:12:15,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116116 to 69036. [2020-12-22 07:12:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69036 states. [2020-12-22 07:12:15,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69036 states to 69036 states and 92551 transitions. [2020-12-22 07:12:15,955 INFO L78 Accepts]: Start accepts. Automaton has 69036 states and 92551 transitions. Word has length 225 [2020-12-22 07:12:15,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:15,955 INFO L481 AbstractCegarLoop]: Abstraction has 69036 states and 92551 transitions. [2020-12-22 07:12:15,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 69036 states and 92551 transitions. [2020-12-22 07:12:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:12:15,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:15,975 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:15,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 07:12:15,975 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:15,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:15,976 INFO L82 PathProgramCache]: Analyzing trace with hash -134050195, now seen corresponding path program 1 times [2020-12-22 07:12:15,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:15,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726156823] [2020-12-22 07:12:15,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:12:16,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726156823] [2020-12-22 07:12:16,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:16,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:12:16,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138364827] [2020-12-22 07:12:16,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:12:16,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:12:16,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:12:16,064 INFO L87 Difference]: Start difference. First operand 69036 states and 92551 transitions. Second operand 5 states. [2020-12-22 07:12:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:12:33,138 INFO L93 Difference]: Finished difference Result 226855 states and 307458 transitions. [2020-12-22 07:12:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:12:33,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-12-22 07:12:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:12:33,355 INFO L225 Difference]: With dead ends: 226855 [2020-12-22 07:12:33,355 INFO L226 Difference]: Without dead ends: 157919 [2020-12-22 07:12:33,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:12:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157919 states. [2020-12-22 07:12:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157919 to 70959. [2020-12-22 07:12:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70959 states. [2020-12-22 07:12:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70959 states to 70959 states and 94474 transitions. [2020-12-22 07:12:42,434 INFO L78 Accepts]: Start accepts. Automaton has 70959 states and 94474 transitions. Word has length 225 [2020-12-22 07:12:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:12:42,435 INFO L481 AbstractCegarLoop]: Abstraction has 70959 states and 94474 transitions. [2020-12-22 07:12:42,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:12:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 70959 states and 94474 transitions. [2020-12-22 07:12:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 07:12:42,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:12:42,459 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:42,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 07:12:42,460 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:12:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:12:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash -110528279, now seen corresponding path program 1 times [2020-12-22 07:12:42,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:12:42,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412362636] [2020-12-22 07:12:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:12:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:12:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:12:42,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412362636] [2020-12-22 07:12:42,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:12:42,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:12:42,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148172155] [2020-12-22 07:12:42,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:12:42,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:12:42,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:12:42,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:12:42,768 INFO L87 Difference]: Start difference. First operand 70959 states and 94474 transitions. Second operand 4 states.