/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/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:18:14,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:18:14,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:18:14,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:18:14,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:18:14,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:18:14,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:18:14,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:18:14,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:18:14,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:18:14,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:18:14,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:18:14,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:18:14,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:18:14,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:18:14,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:18:14,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:18:14,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:18:14,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:18:14,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:18:14,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:18:14,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:18:14,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:18:14,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:18:14,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:18:14,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:18:14,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:18:14,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:18:14,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:18:14,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:18:14,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:18:14,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:18:14,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:18:14,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:18:14,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:18:14,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:18:14,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:18:14,309 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:18:14,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:18:14,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:18:14,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:18:14,313 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:18:14,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:18:14,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:18:14,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:18:14,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:18:14,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:18:14,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:18:14,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:18:14,319 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:18:14,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:18:14,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:18:14,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:18:14,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:18:14,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:18:14,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:18:14,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:18:14,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:18:14,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:18:14,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:18:14,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:18:14,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:18:14,323 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:18:14,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:18:14,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:18:14,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:18:14,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:18:14,786 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:18:14,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:18:14,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75bd16db4/5de8e4d0cd464f3487035e5bec9a8fa4/FLAGbd65b7229 [2020-12-22 10:18:15,778 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:18:15,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:18:15,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75bd16db4/5de8e4d0cd464f3487035e5bec9a8fa4/FLAGbd65b7229 [2020-12-22 10:18:16,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75bd16db4/5de8e4d0cd464f3487035e5bec9a8fa4 [2020-12-22 10:18:16,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:18:16,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:18:16,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:18:16,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:18:16,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:18:16,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:18:16" (1/1) ... [2020-12-22 10:18:16,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4df7cb28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:16, skipping insertion in model container [2020-12-22 10:18:16,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:18:16" (1/1) ... [2020-12-22 10:18:16,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:18:16,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:18:16,924 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/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[20646,20659] [2020-12-22 10:18:17,014 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/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[27339,27352] [2020-12-22 10:18:17,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:18:17,944 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:18:18,036 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/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[20646,20659] [2020-12-22 10:18:18,098 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/combinations/pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[27339,27352] [2020-12-22 10:18:18,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:18:18,802 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:18:18,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:18 WrapperNode [2020-12-22 10:18:18,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:18:18,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:18:18,805 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:18:18,805 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:18:18,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:18" (1/1) ... [2020-12-22 10:18:18,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:18" (1/1) ... [2020-12-22 10:18:19,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:18:19,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:18:19,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:18:19,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:18:19,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:18" (1/1) ... [2020-12-22 10:18:19,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:18" (1/1) ... [2020-12-22 10:18:19,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:18" (1/1) ... [2020-12-22 10:18:19,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:18" (1/1) ... [2020-12-22 10:18:19,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:18" (1/1) ... [2020-12-22 10:18:19,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:18" (1/1) ... [2020-12-22 10:18:19,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:18" (1/1) ... [2020-12-22 10:18:19,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:18:19,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:18:19,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:18:19,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:18:19,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:18" (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 10:18:19,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:18:19,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:18:19,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:18:19,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:18:25,633 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:18:25,633 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:18:25,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:18:25 BoogieIcfgContainer [2020-12-22 10:18:25,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:18:25,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:18:25,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:18:25,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:18:25,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:18:16" (1/3) ... [2020-12-22 10:18:25,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588aef11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:18:25, skipping insertion in model container [2020-12-22 10:18:25,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:18:18" (2/3) ... [2020-12-22 10:18:25,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588aef11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:18:25, skipping insertion in model container [2020-12-22 10:18:25,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:18:25" (3/3) ... [2020-12-22 10:18:25,647 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:18:25,653 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:18:25,659 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:18:25,679 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:18:25,716 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:18:25,716 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:18:25,716 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:18:25,717 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:18:25,717 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:18:25,717 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:18:25,717 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:18:25,717 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:18:25,751 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states. [2020-12-22 10:18:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:18:25,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:25,764 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] [2020-12-22 10:18:25,764 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash 720070723, now seen corresponding path program 1 times [2020-12-22 10:18:25,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:25,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523786173] [2020-12-22 10:18:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:26,058 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 10:18:26,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523786173] [2020-12-22 10:18:26,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:26,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:18:26,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497868279] [2020-12-22 10:18:26,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:18:26,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:26,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:18:26,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:18:26,087 INFO L87 Difference]: Start difference. First operand 943 states. Second operand 2 states. [2020-12-22 10:18:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:26,201 INFO L93 Difference]: Finished difference Result 1828 states and 3460 transitions. [2020-12-22 10:18:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:18:26,203 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:18:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:26,263 INFO L225 Difference]: With dead ends: 1828 [2020-12-22 10:18:26,263 INFO L226 Difference]: Without dead ends: 877 [2020-12-22 10:18:26,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:18:26,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2020-12-22 10:18:26,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2020-12-22 10:18:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2020-12-22 10:18:26,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1652 transitions. [2020-12-22 10:18:26,470 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1652 transitions. Word has length 42 [2020-12-22 10:18:26,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:26,472 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1652 transitions. [2020-12-22 10:18:26,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:18:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1652 transitions. [2020-12-22 10:18:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:18:26,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:26,475 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] [2020-12-22 10:18:26,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:18:26,476 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:26,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:26,479 INFO L82 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2020-12-22 10:18:26,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:26,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058158180] [2020-12-22 10:18:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:26,629 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 10:18:26,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058158180] [2020-12-22 10:18:26,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:26,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:18:26,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546096029] [2020-12-22 10:18:26,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:18:26,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:26,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:18:26,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:18:26,633 INFO L87 Difference]: Start difference. First operand 877 states and 1652 transitions. Second operand 5 states. [2020-12-22 10:18:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:26,848 INFO L93 Difference]: Finished difference Result 948 states and 1763 transitions. [2020-12-22 10:18:26,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:18:26,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:18:26,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:26,855 INFO L225 Difference]: With dead ends: 948 [2020-12-22 10:18:26,856 INFO L226 Difference]: Without dead ends: 877 [2020-12-22 10:18:26,858 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 10:18:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2020-12-22 10:18:26,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2020-12-22 10:18:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2020-12-22 10:18:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1602 transitions. [2020-12-22 10:18:26,887 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1602 transitions. Word has length 42 [2020-12-22 10:18:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:26,887 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1602 transitions. [2020-12-22 10:18:26,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:18:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1602 transitions. [2020-12-22 10:18:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 10:18:26,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:26,890 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] [2020-12-22 10:18:26,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:18:26,891 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:26,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1548744379, now seen corresponding path program 1 times [2020-12-22 10:18:26,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:26,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417602059] [2020-12-22 10:18:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:27,192 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 10:18:27,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417602059] [2020-12-22 10:18:27,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:27,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:27,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276435540] [2020-12-22 10:18:27,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:18:27,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:27,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:18:27,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:18:27,209 INFO L87 Difference]: Start difference. First operand 877 states and 1602 transitions. Second operand 4 states. [2020-12-22 10:18:38,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:38,715 INFO L93 Difference]: Finished difference Result 3132 states and 5911 transitions. [2020-12-22 10:18:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:18:38,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 10:18:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:38,739 INFO L225 Difference]: With dead ends: 3132 [2020-12-22 10:18:38,740 INFO L226 Difference]: Without dead ends: 2379 [2020-12-22 10:18:38,743 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 10:18:38,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2020-12-22 10:18:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2379. [2020-12-22 10:18:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2379 states. [2020-12-22 10:18:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 3728 transitions. [2020-12-22 10:18:38,835 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 3728 transitions. Word has length 60 [2020-12-22 10:18:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:38,836 INFO L481 AbstractCegarLoop]: Abstraction has 2379 states and 3728 transitions. [2020-12-22 10:18:38,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:18:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 3728 transitions. [2020-12-22 10:18:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:18:38,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:38,841 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] [2020-12-22 10:18:38,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:18:38,846 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:38,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2020-12-22 10:18:38,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:38,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649827958] [2020-12-22 10:18:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:39,054 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 10:18:39,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649827958] [2020-12-22 10:18:39,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:39,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:39,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469113487] [2020-12-22 10:18:39,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:39,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:39,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:39,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:39,059 INFO L87 Difference]: Start difference. First operand 2379 states and 3728 transitions. Second operand 3 states. [2020-12-22 10:18:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:39,111 INFO L93 Difference]: Finished difference Result 2507 states and 3932 transitions. [2020-12-22 10:18:39,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:39,112 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:18:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:39,128 INFO L225 Difference]: With dead ends: 2507 [2020-12-22 10:18:39,129 INFO L226 Difference]: Without dead ends: 2440 [2020-12-22 10:18:39,130 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 10:18:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2020-12-22 10:18:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2438. [2020-12-22 10:18:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-12-22 10:18:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 3823 transitions. [2020-12-22 10:18:39,197 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 3823 transitions. Word has length 91 [2020-12-22 10:18:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:39,198 INFO L481 AbstractCegarLoop]: Abstraction has 2438 states and 3823 transitions. [2020-12-22 10:18:39,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:39,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 3823 transitions. [2020-12-22 10:18:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:18:39,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:39,201 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] [2020-12-22 10:18:39,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:18:39,202 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:39,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2020-12-22 10:18:39,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:39,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116288527] [2020-12-22 10:18:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:39,346 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 10:18:39,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116288527] [2020-12-22 10:18:39,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:39,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:39,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403388020] [2020-12-22 10:18:39,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:39,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:39,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:39,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:39,349 INFO L87 Difference]: Start difference. First operand 2438 states and 3823 transitions. Second operand 3 states. [2020-12-22 10:18:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:39,414 INFO L93 Difference]: Finished difference Result 2678 states and 4207 transitions. [2020-12-22 10:18:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:39,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:18:39,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:39,431 INFO L225 Difference]: With dead ends: 2678 [2020-12-22 10:18:39,431 INFO L226 Difference]: Without dead ends: 2552 [2020-12-22 10:18:39,432 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 10:18:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2020-12-22 10:18:39,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2550. [2020-12-22 10:18:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2550 states. [2020-12-22 10:18:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 4002 transitions. [2020-12-22 10:18:39,502 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 4002 transitions. Word has length 91 [2020-12-22 10:18:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:39,502 INFO L481 AbstractCegarLoop]: Abstraction has 2550 states and 4002 transitions. [2020-12-22 10:18:39,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 4002 transitions. [2020-12-22 10:18:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:18:39,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:39,505 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] [2020-12-22 10:18:39,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:18:39,505 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:39,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2020-12-22 10:18:39,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:39,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751787270] [2020-12-22 10:18:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:39,614 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 10:18:39,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751787270] [2020-12-22 10:18:39,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:39,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:39,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241014607] [2020-12-22 10:18:39,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:39,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:39,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:39,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:39,618 INFO L87 Difference]: Start difference. First operand 2550 states and 4002 transitions. Second operand 3 states. [2020-12-22 10:18:39,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:39,684 INFO L93 Difference]: Finished difference Result 3002 states and 4724 transitions. [2020-12-22 10:18:39,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:39,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:18:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:39,703 INFO L225 Difference]: With dead ends: 3002 [2020-12-22 10:18:39,703 INFO L226 Difference]: Without dead ends: 2764 [2020-12-22 10:18:39,705 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 10:18:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2020-12-22 10:18:39,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2762. [2020-12-22 10:18:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2762 states. [2020-12-22 10:18:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 4338 transitions. [2020-12-22 10:18:39,784 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 4338 transitions. Word has length 91 [2020-12-22 10:18:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:39,785 INFO L481 AbstractCegarLoop]: Abstraction has 2762 states and 4338 transitions. [2020-12-22 10:18:39,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 4338 transitions. [2020-12-22 10:18:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:18:39,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:39,787 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] [2020-12-22 10:18:39,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:18:39,789 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:39,794 INFO L82 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2020-12-22 10:18:39,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:39,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665102650] [2020-12-22 10:18:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:39,882 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 10:18:39,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665102650] [2020-12-22 10:18:39,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:39,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:39,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27333776] [2020-12-22 10:18:39,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:39,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:39,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:39,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:39,885 INFO L87 Difference]: Start difference. First operand 2762 states and 4338 transitions. Second operand 3 states. [2020-12-22 10:18:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:39,952 INFO L93 Difference]: Finished difference Result 3614 states and 5692 transitions. [2020-12-22 10:18:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:39,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:18:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:39,969 INFO L225 Difference]: With dead ends: 3614 [2020-12-22 10:18:39,969 INFO L226 Difference]: Without dead ends: 3164 [2020-12-22 10:18:39,974 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 10:18:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2020-12-22 10:18:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 3162. [2020-12-22 10:18:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3162 states. [2020-12-22 10:18:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 4966 transitions. [2020-12-22 10:18:40,070 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 4966 transitions. Word has length 91 [2020-12-22 10:18:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:40,070 INFO L481 AbstractCegarLoop]: Abstraction has 3162 states and 4966 transitions. [2020-12-22 10:18:40,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 4966 transitions. [2020-12-22 10:18:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:18:40,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:40,072 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] [2020-12-22 10:18:40,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:18:40,072 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:40,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:40,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2020-12-22 10:18:40,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:40,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906718336] [2020-12-22 10:18:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:40,178 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 10:18:40,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906718336] [2020-12-22 10:18:40,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:40,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:40,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061812001] [2020-12-22 10:18:40,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:40,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:40,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:40,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:40,182 INFO L87 Difference]: Start difference. First operand 3162 states and 4966 transitions. Second operand 3 states. [2020-12-22 10:18:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:40,292 INFO L93 Difference]: Finished difference Result 4766 states and 7496 transitions. [2020-12-22 10:18:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:40,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:18:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:40,314 INFO L225 Difference]: With dead ends: 4766 [2020-12-22 10:18:40,315 INFO L226 Difference]: Without dead ends: 3916 [2020-12-22 10:18:40,318 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 10:18:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2020-12-22 10:18:40,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3914. [2020-12-22 10:18:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3914 states. [2020-12-22 10:18:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 6134 transitions. [2020-12-22 10:18:40,466 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 6134 transitions. Word has length 91 [2020-12-22 10:18:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:40,467 INFO L481 AbstractCegarLoop]: Abstraction has 3914 states and 6134 transitions. [2020-12-22 10:18:40,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 6134 transitions. [2020-12-22 10:18:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:18:40,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:40,468 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] [2020-12-22 10:18:40,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:18:40,469 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:40,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:40,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2020-12-22 10:18:40,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:40,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94332392] [2020-12-22 10:18:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:40,630 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 10:18:40,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94332392] [2020-12-22 10:18:40,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:40,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:40,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844166083] [2020-12-22 10:18:40,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:40,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:40,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:40,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:40,634 INFO L87 Difference]: Start difference. First operand 3914 states and 6134 transitions. Second operand 9 states. [2020-12-22 10:18:41,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:41,997 INFO L93 Difference]: Finished difference Result 26342 states and 41316 transitions. [2020-12-22 10:18:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:18:41,997 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:18:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:42,103 INFO L225 Difference]: With dead ends: 26342 [2020-12-22 10:18:42,104 INFO L226 Difference]: Without dead ends: 24740 [2020-12-22 10:18:42,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:18:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24740 states. [2020-12-22 10:18:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24740 to 5514. [2020-12-22 10:18:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5514 states. [2020-12-22 10:18:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 8582 transitions. [2020-12-22 10:18:42,626 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 8582 transitions. Word has length 91 [2020-12-22 10:18:42,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:42,626 INFO L481 AbstractCegarLoop]: Abstraction has 5514 states and 8582 transitions. [2020-12-22 10:18:42,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:42,626 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 8582 transitions. [2020-12-22 10:18:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:18:42,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:42,628 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] [2020-12-22 10:18:42,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:18:42,628 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:42,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2020-12-22 10:18:42,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:42,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255376571] [2020-12-22 10:18:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:42,731 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 10:18:42,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255376571] [2020-12-22 10:18:42,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:42,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:42,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35871136] [2020-12-22 10:18:42,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:42,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:42,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:42,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:42,736 INFO L87 Difference]: Start difference. First operand 5514 states and 8582 transitions. Second operand 3 states. [2020-12-22 10:18:43,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:43,076 INFO L93 Difference]: Finished difference Result 10240 states and 15898 transitions. [2020-12-22 10:18:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:43,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:18:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:43,093 INFO L225 Difference]: With dead ends: 10240 [2020-12-22 10:18:43,093 INFO L226 Difference]: Without dead ends: 7038 [2020-12-22 10:18:43,100 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 10:18:43,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2020-12-22 10:18:43,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 7036. [2020-12-22 10:18:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7036 states. [2020-12-22 10:18:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 10888 transitions. [2020-12-22 10:18:43,480 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 10888 transitions. Word has length 93 [2020-12-22 10:18:43,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:43,481 INFO L481 AbstractCegarLoop]: Abstraction has 7036 states and 10888 transitions. [2020-12-22 10:18:43,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:43,481 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 10888 transitions. [2020-12-22 10:18:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:18:43,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:43,483 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] [2020-12-22 10:18:43,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:18:43,483 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:43,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:43,484 INFO L82 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2020-12-22 10:18:43,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:43,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611014531] [2020-12-22 10:18:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:43,911 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 10:18:43,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611014531] [2020-12-22 10:18:43,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:43,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:43,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146903108] [2020-12-22 10:18:43,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:43,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:43,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:43,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:43,914 INFO L87 Difference]: Start difference. First operand 7036 states and 10888 transitions. Second operand 9 states. [2020-12-22 10:18:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:44,855 INFO L93 Difference]: Finished difference Result 11760 states and 18154 transitions. [2020-12-22 10:18:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:44,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:18:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:44,872 INFO L225 Difference]: With dead ends: 11760 [2020-12-22 10:18:44,872 INFO L226 Difference]: Without dead ends: 7038 [2020-12-22 10:18:44,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:18:44,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2020-12-22 10:18:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 7036. [2020-12-22 10:18:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7036 states. [2020-12-22 10:18:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 10840 transitions. [2020-12-22 10:18:45,305 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 10840 transitions. Word has length 93 [2020-12-22 10:18:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:45,306 INFO L481 AbstractCegarLoop]: Abstraction has 7036 states and 10840 transitions. [2020-12-22 10:18:45,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:45,306 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 10840 transitions. [2020-12-22 10:18:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:18:45,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:45,307 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] [2020-12-22 10:18:45,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:18:45,308 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:45,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:45,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2020-12-22 10:18:45,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:45,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931532963] [2020-12-22 10:18:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:45,378 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 10:18:45,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931532963] [2020-12-22 10:18:45,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:45,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:45,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871237298] [2020-12-22 10:18:45,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:45,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:45,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:45,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:45,381 INFO L87 Difference]: Start difference. First operand 7036 states and 10840 transitions. Second operand 3 states. [2020-12-22 10:18:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:45,926 INFO L93 Difference]: Finished difference Result 15904 states and 24314 transitions. [2020-12-22 10:18:45,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:45,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:18:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:45,949 INFO L225 Difference]: With dead ends: 15904 [2020-12-22 10:18:45,950 INFO L226 Difference]: Without dead ends: 11182 [2020-12-22 10:18:45,959 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 10:18:45,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11182 states. [2020-12-22 10:18:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11182 to 11180. [2020-12-22 10:18:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11180 states. [2020-12-22 10:18:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 17000 transitions. [2020-12-22 10:18:46,700 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 17000 transitions. Word has length 93 [2020-12-22 10:18:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:46,700 INFO L481 AbstractCegarLoop]: Abstraction has 11180 states and 17000 transitions. [2020-12-22 10:18:46,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 17000 transitions. [2020-12-22 10:18:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:18:46,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:46,702 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] [2020-12-22 10:18:46,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:18:46,703 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2020-12-22 10:18:46,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:46,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801398579] [2020-12-22 10:18:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:46,783 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 10:18:46,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801398579] [2020-12-22 10:18:46,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:46,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:46,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243591972] [2020-12-22 10:18:46,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:46,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:46,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:46,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:46,786 INFO L87 Difference]: Start difference. First operand 11180 states and 17000 transitions. Second operand 3 states. [2020-12-22 10:18:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:47,576 INFO L93 Difference]: Finished difference Result 27760 states and 41834 transitions. [2020-12-22 10:18:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:47,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:18:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:47,617 INFO L225 Difference]: With dead ends: 27760 [2020-12-22 10:18:47,617 INFO L226 Difference]: Without dead ends: 18894 [2020-12-22 10:18:47,632 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 10:18:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18894 states. [2020-12-22 10:18:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18894 to 18892. [2020-12-22 10:18:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18892 states. [2020-12-22 10:18:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 28264 transitions. [2020-12-22 10:18:48,859 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 28264 transitions. Word has length 93 [2020-12-22 10:18:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:48,859 INFO L481 AbstractCegarLoop]: Abstraction has 18892 states and 28264 transitions. [2020-12-22 10:18:48,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 28264 transitions. [2020-12-22 10:18:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:18:48,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:48,861 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] [2020-12-22 10:18:48,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:18:48,862 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2020-12-22 10:18:48,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:48,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564549373] [2020-12-22 10:18:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:48,971 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 10:18:48,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564549373] [2020-12-22 10:18:48,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:48,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:18:48,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972641902] [2020-12-22 10:18:48,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:18:48,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:48,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:18:48,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:18:48,974 INFO L87 Difference]: Start difference. First operand 18892 states and 28264 transitions. Second operand 6 states. [2020-12-22 10:18:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:50,354 INFO L93 Difference]: Finished difference Result 35470 states and 52905 transitions. [2020-12-22 10:18:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:18:50,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:18:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:50,403 INFO L225 Difference]: With dead ends: 35470 [2020-12-22 10:18:50,403 INFO L226 Difference]: Without dead ends: 18892 [2020-12-22 10:18:50,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2020-12-22 10:18:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18892. [2020-12-22 10:18:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18892 states. [2020-12-22 10:18:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 28008 transitions. [2020-12-22 10:18:51,685 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 28008 transitions. Word has length 94 [2020-12-22 10:18:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:51,685 INFO L481 AbstractCegarLoop]: Abstraction has 18892 states and 28008 transitions. [2020-12-22 10:18:51,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:18:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 28008 transitions. [2020-12-22 10:18:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:18:51,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:51,687 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] [2020-12-22 10:18:51,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:18:51,688 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2020-12-22 10:18:51,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:51,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26727069] [2020-12-22 10:18:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:51,813 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 10:18:51,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26727069] [2020-12-22 10:18:51,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:51,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:18:51,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111199109] [2020-12-22 10:18:51,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:18:51,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:18:51,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:18:51,816 INFO L87 Difference]: Start difference. First operand 18892 states and 28008 transitions. Second operand 6 states. [2020-12-22 10:18:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:52,912 INFO L93 Difference]: Finished difference Result 35470 states and 52393 transitions. [2020-12-22 10:18:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:18:52,912 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-12-22 10:18:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:52,955 INFO L225 Difference]: With dead ends: 35470 [2020-12-22 10:18:52,956 INFO L226 Difference]: Without dead ends: 18892 [2020-12-22 10:18:52,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2020-12-22 10:18:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18892. [2020-12-22 10:18:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18892 states. [2020-12-22 10:18:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 27816 transitions. [2020-12-22 10:18:53,929 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 27816 transitions. Word has length 94 [2020-12-22 10:18:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:53,929 INFO L481 AbstractCegarLoop]: Abstraction has 18892 states and 27816 transitions. [2020-12-22 10:18:53,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:18:53,929 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 27816 transitions. [2020-12-22 10:18:53,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:18:53,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:53,931 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] [2020-12-22 10:18:53,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:18:53,931 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:53,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:53,932 INFO L82 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2020-12-22 10:18:53,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:53,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054217451] [2020-12-22 10:18:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:54,060 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 10:18:54,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054217451] [2020-12-22 10:18:54,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:54,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:18:54,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32020774] [2020-12-22 10:18:54,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:18:54,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:54,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:18:54,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:18:54,063 INFO L87 Difference]: Start difference. First operand 18892 states and 27816 transitions. Second operand 8 states. [2020-12-22 10:18:54,271 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-22 10:18:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:56,314 INFO L93 Difference]: Finished difference Result 33135 states and 48210 transitions. [2020-12-22 10:18:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:18:56,314 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:18:56,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:56,365 INFO L225 Difference]: With dead ends: 33135 [2020-12-22 10:18:56,365 INFO L226 Difference]: Without dead ends: 33133 [2020-12-22 10:18:56,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:18:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33133 states. [2020-12-22 10:18:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33133 to 19660. [2020-12-22 10:18:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19660 states. [2020-12-22 10:18:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19660 states to 19660 states and 28520 transitions. [2020-12-22 10:18:57,990 INFO L78 Accepts]: Start accepts. Automaton has 19660 states and 28520 transitions. Word has length 94 [2020-12-22 10:18:57,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:57,990 INFO L481 AbstractCegarLoop]: Abstraction has 19660 states and 28520 transitions. [2020-12-22 10:18:57,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:18:57,991 INFO L276 IsEmpty]: Start isEmpty. Operand 19660 states and 28520 transitions. [2020-12-22 10:18:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:18:58,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:58,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:18:58,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:18:58,008 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:58,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1704205326, now seen corresponding path program 1 times [2020-12-22 10:18:58,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:58,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230032823] [2020-12-22 10:18:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:18:58,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230032823] [2020-12-22 10:18:58,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:58,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:58,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390569313] [2020-12-22 10:18:58,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:58,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:58,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:58,192 INFO L87 Difference]: Start difference. First operand 19660 states and 28520 transitions. Second operand 9 states. [2020-12-22 10:19:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:06,667 INFO L93 Difference]: Finished difference Result 144476 states and 207504 transitions. [2020-12-22 10:19:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:06,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:19:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:06,992 INFO L225 Difference]: With dead ends: 144476 [2020-12-22 10:19:06,992 INFO L226 Difference]: Without dead ends: 127130 [2020-12-22 10:19:07,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:19:07,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127130 states. [2020-12-22 10:19:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127130 to 37004. [2020-12-22 10:19:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37004 states. [2020-12-22 10:19:10,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37004 states to 37004 states and 53224 transitions. [2020-12-22 10:19:10,665 INFO L78 Accepts]: Start accepts. Automaton has 37004 states and 53224 transitions. Word has length 129 [2020-12-22 10:19:10,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:10,666 INFO L481 AbstractCegarLoop]: Abstraction has 37004 states and 53224 transitions. [2020-12-22 10:19:10,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:10,666 INFO L276 IsEmpty]: Start isEmpty. Operand 37004 states and 53224 transitions. [2020-12-22 10:19:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:19:10,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:10,683 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:10,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:19:10,684 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:10,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1343254354, now seen corresponding path program 1 times [2020-12-22 10:19:10,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:10,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730123040] [2020-12-22 10:19:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:19:10,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730123040] [2020-12-22 10:19:10,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:10,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:19:10,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711658843] [2020-12-22 10:19:10,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:19:10,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:10,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:19:10,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:19:10,873 INFO L87 Difference]: Start difference. First operand 37004 states and 53224 transitions. Second operand 9 states. [2020-12-22 10:19:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:21,047 INFO L93 Difference]: Finished difference Result 161820 states and 232208 transitions. [2020-12-22 10:19:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:21,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:19:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:21,232 INFO L225 Difference]: With dead ends: 161820 [2020-12-22 10:19:21,232 INFO L226 Difference]: Without dead ends: 144474 [2020-12-22 10:19:21,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:19:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144474 states. [2020-12-22 10:19:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144474 to 63052. [2020-12-22 10:19:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63052 states. [2020-12-22 10:19:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63052 states to 63052 states and 90120 transitions. [2020-12-22 10:19:27,094 INFO L78 Accepts]: Start accepts. Automaton has 63052 states and 90120 transitions. Word has length 129 [2020-12-22 10:19:27,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:27,094 INFO L481 AbstractCegarLoop]: Abstraction has 63052 states and 90120 transitions. [2020-12-22 10:19:27,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:27,095 INFO L276 IsEmpty]: Start isEmpty. Operand 63052 states and 90120 transitions. [2020-12-22 10:19:27,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:19:27,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:27,110 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:27,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:19:27,110 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:27,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:27,111 INFO L82 PathProgramCache]: Analyzing trace with hash 126178628, now seen corresponding path program 1 times [2020-12-22 10:19:27,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:27,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869942817] [2020-12-22 10:19:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:19:27,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869942817] [2020-12-22 10:19:27,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:27,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:19:27,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482075697] [2020-12-22 10:19:27,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:19:27,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:27,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:19:27,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:19:27,308 INFO L87 Difference]: Start difference. First operand 63052 states and 90120 transitions. Second operand 9 states. [2020-12-22 10:19:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:39,243 INFO L93 Difference]: Finished difference Result 179164 states and 256912 transitions. [2020-12-22 10:19:39,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:19:39,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:19:39,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:39,444 INFO L225 Difference]: With dead ends: 179164 [2020-12-22 10:19:39,444 INFO L226 Difference]: Without dead ends: 161818 [2020-12-22 10:19:39,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:19:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161818 states. [2020-12-22 10:19:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161818 to 80396. [2020-12-22 10:19:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80396 states. [2020-12-22 10:19:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80396 states to 80396 states and 114824 transitions. [2020-12-22 10:19:46,813 INFO L78 Accepts]: Start accepts. Automaton has 80396 states and 114824 transitions. Word has length 129 [2020-12-22 10:19:46,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:46,814 INFO L481 AbstractCegarLoop]: Abstraction has 80396 states and 114824 transitions. [2020-12-22 10:19:46,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:19:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 80396 states and 114824 transitions. [2020-12-22 10:19:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:19:46,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:46,829 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:46,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:19:46,829 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1109280412, now seen corresponding path program 1 times [2020-12-22 10:19:46,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:46,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561931475] [2020-12-22 10:19:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:19:47,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561931475] [2020-12-22 10:19:47,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:47,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:19:47,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613603003] [2020-12-22 10:19:47,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:19:47,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:47,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:19:47,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:19:47,056 INFO L87 Difference]: Start difference. First operand 80396 states and 114824 transitions. Second operand 9 states. [2020-12-22 10:20:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:01,097 INFO L93 Difference]: Finished difference Result 196508 states and 281616 transitions. [2020-12-22 10:20:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:20:01,098 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:20:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:01,493 INFO L225 Difference]: With dead ends: 196508 [2020-12-22 10:20:01,493 INFO L226 Difference]: Without dead ends: 179162 [2020-12-22 10:20:01,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:20:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179162 states. [2020-12-22 10:20:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179162 to 97740. [2020-12-22 10:20:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97740 states. [2020-12-22 10:20:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97740 states to 97740 states and 139528 transitions. [2020-12-22 10:20:10,585 INFO L78 Accepts]: Start accepts. Automaton has 97740 states and 139528 transitions. Word has length 129 [2020-12-22 10:20:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:10,585 INFO L481 AbstractCegarLoop]: Abstraction has 97740 states and 139528 transitions. [2020-12-22 10:20:10,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:20:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 97740 states and 139528 transitions. [2020-12-22 10:20:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:20:10,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:10,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:20:10,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:20:10,599 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:10,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:10,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1764691332, now seen corresponding path program 1 times [2020-12-22 10:20:10,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:10,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807801320] [2020-12-22 10:20:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:20:10,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807801320] [2020-12-22 10:20:10,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:10,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:20:10,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793342836] [2020-12-22 10:20:10,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:20:10,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:10,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:20:10,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:20:10,965 INFO L87 Difference]: Start difference. First operand 97740 states and 139528 transitions. Second operand 9 states. [2020-12-22 10:20:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:27,917 INFO L93 Difference]: Finished difference Result 213852 states and 306320 transitions. [2020-12-22 10:20:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:20:27,918 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:20:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:28,183 INFO L225 Difference]: With dead ends: 213852 [2020-12-22 10:20:28,183 INFO L226 Difference]: Without dead ends: 196506 [2020-12-22 10:20:28,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:20:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196506 states. [2020-12-22 10:20:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196506 to 115084. [2020-12-22 10:20:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115084 states. [2020-12-22 10:20:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115084 states to 115084 states and 164232 transitions. [2020-12-22 10:20:39,403 INFO L78 Accepts]: Start accepts. Automaton has 115084 states and 164232 transitions. Word has length 129 [2020-12-22 10:20:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:39,404 INFO L481 AbstractCegarLoop]: Abstraction has 115084 states and 164232 transitions. [2020-12-22 10:20:39,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:20:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 115084 states and 164232 transitions. [2020-12-22 10:20:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:20:39,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:39,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:20:39,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:20:39,419 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:39,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:39,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1198870948, now seen corresponding path program 1 times [2020-12-22 10:20:39,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:39,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483011274] [2020-12-22 10:20:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:20:39,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483011274] [2020-12-22 10:20:39,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:39,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:20:39,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528405779] [2020-12-22 10:20:39,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:20:39,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:39,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:20:39,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:20:39,603 INFO L87 Difference]: Start difference. First operand 115084 states and 164232 transitions. Second operand 9 states. [2020-12-22 10:21:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:00,117 INFO L93 Difference]: Finished difference Result 231196 states and 331024 transitions. [2020-12-22 10:21:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:21:00,118 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:21:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:00,595 INFO L225 Difference]: With dead ends: 231196 [2020-12-22 10:21:00,595 INFO L226 Difference]: Without dead ends: 213850 [2020-12-22 10:21:00,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:21:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213850 states. [2020-12-22 10:21:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213850 to 132428. [2020-12-22 10:21:14,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132428 states. [2020-12-22 10:21:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132428 states to 132428 states and 188936 transitions. [2020-12-22 10:21:14,747 INFO L78 Accepts]: Start accepts. Automaton has 132428 states and 188936 transitions. Word has length 129 [2020-12-22 10:21:14,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:14,747 INFO L481 AbstractCegarLoop]: Abstraction has 132428 states and 188936 transitions. [2020-12-22 10:21:14,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:21:14,747 INFO L276 IsEmpty]: Start isEmpty. Operand 132428 states and 188936 transitions. [2020-12-22 10:21:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:21:14,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:14,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:21:14,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:21:14,766 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:14,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1388086724, now seen corresponding path program 1 times [2020-12-22 10:21:14,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:14,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179261145] [2020-12-22 10:21:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:21:15,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179261145] [2020-12-22 10:21:15,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:15,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:21:15,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063382625] [2020-12-22 10:21:15,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:21:15,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:15,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:21:15,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:21:15,179 INFO L87 Difference]: Start difference. First operand 132428 states and 188936 transitions. Second operand 9 states.