/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:23:25,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:23:25,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:23:26,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:23:26,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:23:26,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:23:26,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:23:26,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:23:26,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:23:26,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:23:26,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:23:26,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:23:26,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:23:26,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:23:26,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:23:26,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:23:26,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:23:26,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:23:26,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:23:26,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:23:26,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:23:26,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:23:26,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:23:26,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:23:26,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:23:26,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:23:26,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:23:26,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:23:26,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:23:26,224 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:23:26,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:23:26,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:23:26,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:23:26,231 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:23:26,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:23:26,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:23:26,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:23:26,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:23:26,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:23:26,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:23:26,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:23:26,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:23:26,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:23:26,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:23:26,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:23:26,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:23:26,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:23:26,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:23:26,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:23:26,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:23:26,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:23:26,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:23:26,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:23:26,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:23:26,237 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:23:26,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:23:26,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:23:26,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:23:26,706 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:23:26,708 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:23:26,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-12-22 08:23:26,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6833bf58/dd66af801d244079a82b6cbba8b5bac9/FLAGe95b8ae6c [2020-12-22 08:23:27,745 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:23:27,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-12-22 08:23:27,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6833bf58/dd66af801d244079a82b6cbba8b5bac9/FLAGe95b8ae6c [2020-12-22 08:23:27,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6833bf58/dd66af801d244079a82b6cbba8b5bac9 [2020-12-22 08:23:27,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:23:27,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:23:27,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:23:27,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:23:27,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:23:27,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:23:27" (1/1) ... [2020-12-22 08:23:27,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48bb70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:27, skipping insertion in model container [2020-12-22 08:23:27,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:23:27" (1/1) ... [2020-12-22 08:23:27,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:23:27,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:23:28,254 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[10230,10243] [2020-12-22 08:23:28,373 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[25456,25469] [2020-12-22 08:23:28,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:23:28,689 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:23:28,795 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[10230,10243] [2020-12-22 08:23:28,936 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[25456,25469] [2020-12-22 08:23:29,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:23:29,254 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:23:29,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:29 WrapperNode [2020-12-22 08:23:29,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:23:29,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:23:29,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:23:29,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:23:29,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:29" (1/1) ... [2020-12-22 08:23:29,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:29" (1/1) ... [2020-12-22 08:23:29,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:23:29,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:23:29,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:23:29,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:23:29,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:29" (1/1) ... [2020-12-22 08:23:29,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:29" (1/1) ... [2020-12-22 08:23:29,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:29" (1/1) ... [2020-12-22 08:23:29,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:29" (1/1) ... [2020-12-22 08:23:29,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:29" (1/1) ... [2020-12-22 08:23:29,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:29" (1/1) ... [2020-12-22 08:23:29,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:29" (1/1) ... [2020-12-22 08:23:29,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:23:29,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:23:29,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:23:29,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:23:29,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:29" (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 08:23:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:23:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:23:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:23:29,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:23:32,373 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:23:32,374 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:23:32,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:23:32 BoogieIcfgContainer [2020-12-22 08:23:32,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:23:32,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:23:32,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:23:32,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:23:32,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:23:27" (1/3) ... [2020-12-22 08:23:32,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73778a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:23:32, skipping insertion in model container [2020-12-22 08:23:32,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:29" (2/3) ... [2020-12-22 08:23:32,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73778a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:23:32, skipping insertion in model container [2020-12-22 08:23:32,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:23:32" (3/3) ... [2020-12-22 08:23:32,386 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-12-22 08:23:32,393 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:23:32,399 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 08:23:32,419 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 08:23:32,452 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:23:32,453 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:23:32,453 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:23:32,453 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:23:32,453 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:23:32,453 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:23:32,454 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:23:32,454 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:23:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states. [2020-12-22 08:23:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:23:32,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:32,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:32,521 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -377035951, now seen corresponding path program 1 times [2020-12-22 08:23:32,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:32,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511390411] [2020-12-22 08:23:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:32,996 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 08:23:32,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511390411] [2020-12-22 08:23:32,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:32,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:32,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755430217] [2020-12-22 08:23:33,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:33,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:33,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:33,024 INFO L87 Difference]: Start difference. First operand 705 states. Second operand 3 states. [2020-12-22 08:23:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:33,201 INFO L93 Difference]: Finished difference Result 1069 states and 1856 transitions. [2020-12-22 08:23:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:33,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:23:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:33,246 INFO L225 Difference]: With dead ends: 1069 [2020-12-22 08:23:33,246 INFO L226 Difference]: Without dead ends: 846 [2020-12-22 08:23:33,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:33,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2020-12-22 08:23:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 844. [2020-12-22 08:23:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 08:23:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1152 transitions. [2020-12-22 08:23:33,439 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1152 transitions. Word has length 63 [2020-12-22 08:23:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:33,442 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1152 transitions. [2020-12-22 08:23:33,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1152 transitions. [2020-12-22 08:23:33,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:23:33,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:33,447 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] [2020-12-22 08:23:33,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:23:33,447 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:33,450 INFO L82 PathProgramCache]: Analyzing trace with hash 714072948, now seen corresponding path program 1 times [2020-12-22 08:23:33,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:33,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486925825] [2020-12-22 08:23:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:33,681 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 08:23:33,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486925825] [2020-12-22 08:23:33,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:33,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:33,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771413991] [2020-12-22 08:23:33,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:33,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:33,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:33,685 INFO L87 Difference]: Start difference. First operand 844 states and 1152 transitions. Second operand 3 states. [2020-12-22 08:23:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:33,972 INFO L93 Difference]: Finished difference Result 1471 states and 2026 transitions. [2020-12-22 08:23:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:33,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:23:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:33,982 INFO L225 Difference]: With dead ends: 1471 [2020-12-22 08:23:33,983 INFO L226 Difference]: Without dead ends: 1228 [2020-12-22 08:23:33,988 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 08:23:33,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2020-12-22 08:23:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1224. [2020-12-22 08:23:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1224 states. [2020-12-22 08:23:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1655 transitions. [2020-12-22 08:23:34,046 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1655 transitions. Word has length 64 [2020-12-22 08:23:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:34,046 INFO L481 AbstractCegarLoop]: Abstraction has 1224 states and 1655 transitions. [2020-12-22 08:23:34,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1655 transitions. [2020-12-22 08:23:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:23:34,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:34,053 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] [2020-12-22 08:23:34,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:23:34,054 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1908609010, now seen corresponding path program 1 times [2020-12-22 08:23:34,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:34,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119681625] [2020-12-22 08:23:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:34,293 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 08:23:34,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119681625] [2020-12-22 08:23:34,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:34,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:23:34,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920630680] [2020-12-22 08:23:34,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:23:34,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:34,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:23:34,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:34,300 INFO L87 Difference]: Start difference. First operand 1224 states and 1655 transitions. Second operand 6 states. [2020-12-22 08:23:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:35,380 INFO L93 Difference]: Finished difference Result 2895 states and 4053 transitions. [2020-12-22 08:23:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:23:35,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-12-22 08:23:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:35,392 INFO L225 Difference]: With dead ends: 2895 [2020-12-22 08:23:35,392 INFO L226 Difference]: Without dead ends: 1896 [2020-12-22 08:23:35,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:23:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2020-12-22 08:23:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1892. [2020-12-22 08:23:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1892 states. [2020-12-22 08:23:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 2659 transitions. [2020-12-22 08:23:35,497 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 2659 transitions. Word has length 64 [2020-12-22 08:23:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:35,498 INFO L481 AbstractCegarLoop]: Abstraction has 1892 states and 2659 transitions. [2020-12-22 08:23:35,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:23:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 2659 transitions. [2020-12-22 08:23:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:23:35,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:35,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:35,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:23:35,502 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:35,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1292035188, now seen corresponding path program 1 times [2020-12-22 08:23:35,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:35,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121738980] [2020-12-22 08:23:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:35,593 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 08:23:35,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121738980] [2020-12-22 08:23:35,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:35,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:35,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492624026] [2020-12-22 08:23:35,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:35,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:35,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:35,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:35,596 INFO L87 Difference]: Start difference. First operand 1892 states and 2659 transitions. Second operand 3 states. [2020-12-22 08:23:35,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:35,756 INFO L93 Difference]: Finished difference Result 4009 states and 5728 transitions. [2020-12-22 08:23:35,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:35,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:23:35,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:35,771 INFO L225 Difference]: With dead ends: 4009 [2020-12-22 08:23:35,771 INFO L226 Difference]: Without dead ends: 2723 [2020-12-22 08:23:35,774 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 08:23:35,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2020-12-22 08:23:35,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2713. [2020-12-22 08:23:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2713 states. [2020-12-22 08:23:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 3798 transitions. [2020-12-22 08:23:35,926 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 3798 transitions. Word has length 65 [2020-12-22 08:23:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:35,927 INFO L481 AbstractCegarLoop]: Abstraction has 2713 states and 3798 transitions. [2020-12-22 08:23:35,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 3798 transitions. [2020-12-22 08:23:35,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:23:35,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:35,932 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] [2020-12-22 08:23:35,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:23:35,933 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:35,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:35,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1184582392, now seen corresponding path program 1 times [2020-12-22 08:23:35,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:35,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103662159] [2020-12-22 08:23:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:36,001 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 08:23:36,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103662159] [2020-12-22 08:23:36,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:36,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:36,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788534554] [2020-12-22 08:23:36,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:36,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:36,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:36,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:36,004 INFO L87 Difference]: Start difference. First operand 2713 states and 3798 transitions. Second operand 3 states. [2020-12-22 08:23:36,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:36,277 INFO L93 Difference]: Finished difference Result 6192 states and 8804 transitions. [2020-12-22 08:23:36,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:36,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 08:23:36,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:36,301 INFO L225 Difference]: With dead ends: 6192 [2020-12-22 08:23:36,301 INFO L226 Difference]: Without dead ends: 4294 [2020-12-22 08:23:36,305 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 08:23:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-12-22 08:23:36,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4290. [2020-12-22 08:23:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4290 states. [2020-12-22 08:23:36,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4290 states to 4290 states and 5985 transitions. [2020-12-22 08:23:36,537 INFO L78 Accepts]: Start accepts. Automaton has 4290 states and 5985 transitions. Word has length 66 [2020-12-22 08:23:36,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:36,538 INFO L481 AbstractCegarLoop]: Abstraction has 4290 states and 5985 transitions. [2020-12-22 08:23:36,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4290 states and 5985 transitions. [2020-12-22 08:23:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:23:36,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:36,544 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] [2020-12-22 08:23:36,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:23:36,545 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:36,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:36,545 INFO L82 PathProgramCache]: Analyzing trace with hash -237880367, now seen corresponding path program 1 times [2020-12-22 08:23:36,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:36,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393480120] [2020-12-22 08:23:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:36,653 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 08:23:36,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393480120] [2020-12-22 08:23:36,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:36,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:23:36,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855956824] [2020-12-22 08:23:36,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:23:36,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:36,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:23:36,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:36,656 INFO L87 Difference]: Start difference. First operand 4290 states and 5985 transitions. Second operand 6 states. [2020-12-22 08:23:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:37,695 INFO L93 Difference]: Finished difference Result 12075 states and 17029 transitions. [2020-12-22 08:23:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:23:37,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 08:23:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:37,739 INFO L225 Difference]: With dead ends: 12075 [2020-12-22 08:23:37,739 INFO L226 Difference]: Without dead ends: 8120 [2020-12-22 08:23:37,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:23:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8120 states. [2020-12-22 08:23:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8120 to 8072. [2020-12-22 08:23:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-12-22 08:23:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 11361 transitions. [2020-12-22 08:23:38,273 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 11361 transitions. Word has length 66 [2020-12-22 08:23:38,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:38,275 INFO L481 AbstractCegarLoop]: Abstraction has 8072 states and 11361 transitions. [2020-12-22 08:23:38,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:23:38,275 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 11361 transitions. [2020-12-22 08:23:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:23:38,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:38,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:38,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:23:38,283 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:38,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:38,287 INFO L82 PathProgramCache]: Analyzing trace with hash 426192215, now seen corresponding path program 1 times [2020-12-22 08:23:38,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:38,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580758720] [2020-12-22 08:23:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:38,405 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 08:23:38,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580758720] [2020-12-22 08:23:38,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:38,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:23:38,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615335074] [2020-12-22 08:23:38,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:23:38,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:38,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:23:38,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:23:38,410 INFO L87 Difference]: Start difference. First operand 8072 states and 11361 transitions. Second operand 7 states. [2020-12-22 08:23:41,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:41,146 INFO L93 Difference]: Finished difference Result 32696 states and 46991 transitions. [2020-12-22 08:23:41,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:23:41,146 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-12-22 08:23:41,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:41,242 INFO L225 Difference]: With dead ends: 32696 [2020-12-22 08:23:41,243 INFO L226 Difference]: Without dead ends: 29842 [2020-12-22 08:23:41,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:23:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29842 states. [2020-12-22 08:23:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29842 to 8096. [2020-12-22 08:23:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8096 states. [2020-12-22 08:23:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8096 states to 8096 states and 11393 transitions. [2020-12-22 08:23:42,068 INFO L78 Accepts]: Start accepts. Automaton has 8096 states and 11393 transitions. Word has length 67 [2020-12-22 08:23:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:42,068 INFO L481 AbstractCegarLoop]: Abstraction has 8096 states and 11393 transitions. [2020-12-22 08:23:42,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:23:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 8096 states and 11393 transitions. [2020-12-22 08:23:42,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:23:42,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:42,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:42,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:23:42,076 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:42,076 INFO L82 PathProgramCache]: Analyzing trace with hash -889016011, now seen corresponding path program 1 times [2020-12-22 08:23:42,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:42,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614726264] [2020-12-22 08:23:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:42,161 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 08:23:42,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614726264] [2020-12-22 08:23:42,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:42,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:23:42,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247981085] [2020-12-22 08:23:42,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:23:42,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:42,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:23:42,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:23:42,164 INFO L87 Difference]: Start difference. First operand 8096 states and 11393 transitions. Second operand 5 states. [2020-12-22 08:23:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:43,298 INFO L93 Difference]: Finished difference Result 18923 states and 26696 transitions. [2020-12-22 08:23:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:23:43,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:23:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:43,324 INFO L225 Difference]: With dead ends: 18923 [2020-12-22 08:23:43,325 INFO L226 Difference]: Without dead ends: 11137 [2020-12-22 08:23:43,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:23:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11137 states. [2020-12-22 08:23:44,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11137 to 8096. [2020-12-22 08:23:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8096 states. [2020-12-22 08:23:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8096 states to 8096 states and 11342 transitions. [2020-12-22 08:23:44,036 INFO L78 Accepts]: Start accepts. Automaton has 8096 states and 11342 transitions. Word has length 67 [2020-12-22 08:23:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:44,037 INFO L481 AbstractCegarLoop]: Abstraction has 8096 states and 11342 transitions. [2020-12-22 08:23:44,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:23:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 8096 states and 11342 transitions. [2020-12-22 08:23:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:23:44,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:44,049 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] [2020-12-22 08:23:44,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:23:44,049 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:44,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:44,050 INFO L82 PathProgramCache]: Analyzing trace with hash -132013379, now seen corresponding path program 1 times [2020-12-22 08:23:44,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:44,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061091038] [2020-12-22 08:23:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:44,192 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 08:23:44,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061091038] [2020-12-22 08:23:44,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:44,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:23:44,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318029389] [2020-12-22 08:23:44,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:23:44,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:44,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:23:44,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:44,196 INFO L87 Difference]: Start difference. First operand 8096 states and 11342 transitions. Second operand 6 states. [2020-12-22 08:23:45,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:45,740 INFO L93 Difference]: Finished difference Result 24495 states and 34377 transitions. [2020-12-22 08:23:45,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:23:45,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-22 08:23:45,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:45,778 INFO L225 Difference]: With dead ends: 24495 [2020-12-22 08:23:45,778 INFO L226 Difference]: Without dead ends: 16680 [2020-12-22 08:23:45,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:23:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16680 states. [2020-12-22 08:23:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16680 to 16572. [2020-12-22 08:23:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16572 states. [2020-12-22 08:23:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16572 states to 16572 states and 23165 transitions. [2020-12-22 08:23:47,070 INFO L78 Accepts]: Start accepts. Automaton has 16572 states and 23165 transitions. Word has length 68 [2020-12-22 08:23:47,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:47,071 INFO L481 AbstractCegarLoop]: Abstraction has 16572 states and 23165 transitions. [2020-12-22 08:23:47,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:23:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 16572 states and 23165 transitions. [2020-12-22 08:23:47,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:23:47,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:47,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:47,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:23:47,078 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash -416949424, now seen corresponding path program 1 times [2020-12-22 08:23:47,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:47,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535728278] [2020-12-22 08:23:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:47,168 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 08:23:47,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535728278] [2020-12-22 08:23:47,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:47,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:23:47,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355849248] [2020-12-22 08:23:47,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:23:47,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:47,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:23:47,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:23:47,170 INFO L87 Difference]: Start difference. First operand 16572 states and 23165 transitions. Second operand 7 states. [2020-12-22 08:23:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:52,008 INFO L93 Difference]: Finished difference Result 62408 states and 87287 transitions. [2020-12-22 08:23:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:23:52,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-12-22 08:23:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:52,088 INFO L225 Difference]: With dead ends: 62408 [2020-12-22 08:23:52,089 INFO L226 Difference]: Without dead ends: 53841 [2020-12-22 08:23:52,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:23:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53841 states. [2020-12-22 08:23:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53841 to 16600. [2020-12-22 08:23:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16600 states. [2020-12-22 08:23:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16600 states to 16600 states and 23201 transitions. [2020-12-22 08:23:53,993 INFO L78 Accepts]: Start accepts. Automaton has 16600 states and 23201 transitions. Word has length 68 [2020-12-22 08:23:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:53,993 INFO L481 AbstractCegarLoop]: Abstraction has 16600 states and 23201 transitions. [2020-12-22 08:23:53,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:23:53,993 INFO L276 IsEmpty]: Start isEmpty. Operand 16600 states and 23201 transitions. [2020-12-22 08:23:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:23:54,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:54,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:54,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:23:54,003 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:54,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:54,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1441651372, now seen corresponding path program 1 times [2020-12-22 08:23:54,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:54,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067887549] [2020-12-22 08:23:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:54,137 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 08:23:54,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067887549] [2020-12-22 08:23:54,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:54,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:23:54,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518097901] [2020-12-22 08:23:54,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:23:54,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:54,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:23:54,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:23:54,141 INFO L87 Difference]: Start difference. First operand 16600 states and 23201 transitions. Second operand 7 states. [2020-12-22 08:24:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:01,814 INFO L93 Difference]: Finished difference Result 78844 states and 111437 transitions. [2020-12-22 08:24:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:24:01,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-12-22 08:24:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:01,917 INFO L225 Difference]: With dead ends: 78844 [2020-12-22 08:24:01,918 INFO L226 Difference]: Without dead ends: 70762 [2020-12-22 08:24:01,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:24:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70762 states. [2020-12-22 08:24:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70762 to 16697. [2020-12-22 08:24:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16697 states. [2020-12-22 08:24:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16697 states to 16697 states and 23330 transitions. [2020-12-22 08:24:03,956 INFO L78 Accepts]: Start accepts. Automaton has 16697 states and 23330 transitions. Word has length 69 [2020-12-22 08:24:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:03,957 INFO L481 AbstractCegarLoop]: Abstraction has 16697 states and 23330 transitions. [2020-12-22 08:24:03,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:24:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 16697 states and 23330 transitions. [2020-12-22 08:24:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:24:03,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:03,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:03,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:24:03,962 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:03,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:03,963 INFO L82 PathProgramCache]: Analyzing trace with hash 756148337, now seen corresponding path program 1 times [2020-12-22 08:24:03,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:03,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114752999] [2020-12-22 08:24:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:04,239 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 08:24:04,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114752999] [2020-12-22 08:24:04,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:04,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:24:04,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22881083] [2020-12-22 08:24:04,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:24:04,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:04,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:24:04,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:24:04,243 INFO L87 Difference]: Start difference. First operand 16697 states and 23330 transitions. Second operand 10 states. [2020-12-22 08:24:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:16,588 INFO L93 Difference]: Finished difference Result 91899 states and 130432 transitions. [2020-12-22 08:24:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 08:24:16,589 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-12-22 08:24:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:16,683 INFO L225 Difference]: With dead ends: 91899 [2020-12-22 08:24:16,683 INFO L226 Difference]: Without dead ends: 85295 [2020-12-22 08:24:16,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=374, Invalid=1108, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 08:24:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85295 states. [2020-12-22 08:24:19,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85295 to 16697. [2020-12-22 08:24:19,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16697 states. [2020-12-22 08:24:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16697 states to 16697 states and 23328 transitions. [2020-12-22 08:24:19,033 INFO L78 Accepts]: Start accepts. Automaton has 16697 states and 23328 transitions. Word has length 70 [2020-12-22 08:24:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:19,033 INFO L481 AbstractCegarLoop]: Abstraction has 16697 states and 23328 transitions. [2020-12-22 08:24:19,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:24:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 16697 states and 23328 transitions. [2020-12-22 08:24:19,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:24:19,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:19,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:19,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:24:19,040 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:19,041 INFO L82 PathProgramCache]: Analyzing trace with hash -223540144, now seen corresponding path program 1 times [2020-12-22 08:24:19,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:19,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620493579] [2020-12-22 08:24:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:19,223 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 08:24:19,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620493579] [2020-12-22 08:24:19,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:19,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:24:19,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831604399] [2020-12-22 08:24:19,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:24:19,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:19,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:24:19,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:24:19,225 INFO L87 Difference]: Start difference. First operand 16697 states and 23328 transitions. Second operand 9 states. [2020-12-22 08:24:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:26,428 INFO L93 Difference]: Finished difference Result 54997 states and 78170 transitions. [2020-12-22 08:24:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:24:26,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-12-22 08:24:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:26,473 INFO L225 Difference]: With dead ends: 54997 [2020-12-22 08:24:26,473 INFO L226 Difference]: Without dead ends: 41637 [2020-12-22 08:24:26,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:24:26,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41637 states. [2020-12-22 08:24:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41637 to 16693. [2020-12-22 08:24:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16693 states. [2020-12-22 08:24:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16693 states to 16693 states and 23320 transitions. [2020-12-22 08:24:28,710 INFO L78 Accepts]: Start accepts. Automaton has 16693 states and 23320 transitions. Word has length 70 [2020-12-22 08:24:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:28,711 INFO L481 AbstractCegarLoop]: Abstraction has 16693 states and 23320 transitions. [2020-12-22 08:24:28,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:24:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand 16693 states and 23320 transitions. [2020-12-22 08:24:28,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:24:28,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:28,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:28,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:24:28,719 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:28,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:28,720 INFO L82 PathProgramCache]: Analyzing trace with hash 66854135, now seen corresponding path program 1 times [2020-12-22 08:24:28,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:28,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254892290] [2020-12-22 08:24:28,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:29,254 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-22 08:24:29,928 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 08:24:29,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254892290] [2020-12-22 08:24:29,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:29,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-12-22 08:24:29,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077967274] [2020-12-22 08:24:29,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 08:24:29,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:29,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 08:24:29,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:24:29,932 INFO L87 Difference]: Start difference. First operand 16693 states and 23320 transitions. Second operand 17 states. [2020-12-22 08:24:30,065 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-22 08:24:30,377 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-12-22 08:24:30,691 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 08:24:30,934 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-22 08:24:31,280 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-22 08:24:31,579 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 08:24:32,139 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 08:24:32,531 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 08:24:32,707 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 08:24:33,114 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-12-22 08:24:33,427 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 08:24:33,784 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 08:24:34,710 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-22 08:24:35,301 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:24:37,478 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-12-22 08:24:37,707 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 08:24:40,304 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 08:24:44,565 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 08:24:46,298 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-12-22 08:24:47,403 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 08:24:47,614 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 08:24:49,551 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-22 08:24:50,663 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-22 08:25:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:01,714 INFO L93 Difference]: Finished difference Result 148867 states and 212794 transitions. [2020-12-22 08:25:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 08:25:01,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-12-22 08:25:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:01,929 INFO L225 Difference]: With dead ends: 148867 [2020-12-22 08:25:01,929 INFO L226 Difference]: Without dead ends: 135507 [2020-12-22 08:25:01,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=553, Invalid=2527, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 08:25:02,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135507 states. [2020-12-22 08:25:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135507 to 16685. [2020-12-22 08:25:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16685 states. [2020-12-22 08:25:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16685 states to 16685 states and 23304 transitions. [2020-12-22 08:25:05,717 INFO L78 Accepts]: Start accepts. Automaton has 16685 states and 23304 transitions. Word has length 71 [2020-12-22 08:25:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:05,717 INFO L481 AbstractCegarLoop]: Abstraction has 16685 states and 23304 transitions. [2020-12-22 08:25:05,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 08:25:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 16685 states and 23304 transitions. [2020-12-22 08:25:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:25:05,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:05,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:05,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:25:05,724 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1113625680, now seen corresponding path program 1 times [2020-12-22 08:25:05,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:05,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193533781] [2020-12-22 08:25:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:05,977 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 08:25:05,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193533781] [2020-12-22 08:25:05,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:05,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:25:05,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837253315] [2020-12-22 08:25:05,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:25:05,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:05,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:25:05,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:25:05,979 INFO L87 Difference]: Start difference. First operand 16685 states and 23304 transitions. Second operand 9 states. [2020-12-22 08:25:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:16,536 INFO L93 Difference]: Finished difference Result 55040 states and 78234 transitions. [2020-12-22 08:25:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:25:16,537 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-12-22 08:25:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:16,577 INFO L225 Difference]: With dead ends: 55040 [2020-12-22 08:25:16,577 INFO L226 Difference]: Without dead ends: 41630 [2020-12-22 08:25:16,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:25:16,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41630 states. [2020-12-22 08:25:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41630 to 16657. [2020-12-22 08:25:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16657 states. [2020-12-22 08:25:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16657 states to 16657 states and 23260 transitions. [2020-12-22 08:25:19,770 INFO L78 Accepts]: Start accepts. Automaton has 16657 states and 23260 transitions. Word has length 71 [2020-12-22 08:25:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:19,771 INFO L481 AbstractCegarLoop]: Abstraction has 16657 states and 23260 transitions. [2020-12-22 08:25:19,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:25:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 16657 states and 23260 transitions. [2020-12-22 08:25:19,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:25:19,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:19,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:19,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:25:19,777 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:19,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:19,778 INFO L82 PathProgramCache]: Analyzing trace with hash 468124592, now seen corresponding path program 1 times [2020-12-22 08:25:19,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:19,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966299500] [2020-12-22 08:25:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:20,286 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 08:25:20,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966299500] [2020-12-22 08:25:20,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:20,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 08:25:20,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574977412] [2020-12-22 08:25:20,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:25:20,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:20,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:25:20,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:25:20,288 INFO L87 Difference]: Start difference. First operand 16657 states and 23260 transitions. Second operand 12 states. [2020-12-22 08:25:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:37,808 INFO L93 Difference]: Finished difference Result 81752 states and 116573 transitions. [2020-12-22 08:25:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 08:25:37,808 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-12-22 08:25:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:37,886 INFO L225 Difference]: With dead ends: 81752 [2020-12-22 08:25:37,887 INFO L226 Difference]: Without dead ends: 68368 [2020-12-22 08:25:37,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2020-12-22 08:25:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68368 states. [2020-12-22 08:25:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68368 to 16625. [2020-12-22 08:25:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16625 states. [2020-12-22 08:25:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16625 states to 16625 states and 23218 transitions. [2020-12-22 08:25:41,959 INFO L78 Accepts]: Start accepts. Automaton has 16625 states and 23218 transitions. Word has length 71 [2020-12-22 08:25:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:41,959 INFO L481 AbstractCegarLoop]: Abstraction has 16625 states and 23218 transitions. [2020-12-22 08:25:41,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:25:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 16625 states and 23218 transitions. [2020-12-22 08:25:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:25:41,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:41,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:41,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:25:41,965 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:41,966 INFO L82 PathProgramCache]: Analyzing trace with hash 525454090, now seen corresponding path program 1 times [2020-12-22 08:25:41,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:41,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151566301] [2020-12-22 08:25:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:42,056 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 08:25:42,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151566301] [2020-12-22 08:25:42,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:42,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:25:42,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049449995] [2020-12-22 08:25:42,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:25:42,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:42,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:25:42,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:25:42,059 INFO L87 Difference]: Start difference. First operand 16625 states and 23218 transitions. Second operand 7 states. [2020-12-22 08:25:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:58,218 INFO L93 Difference]: Finished difference Result 68899 states and 96934 transitions. [2020-12-22 08:25:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:25:58,219 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-12-22 08:25:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:58,286 INFO L225 Difference]: With dead ends: 68899 [2020-12-22 08:25:58,286 INFO L226 Difference]: Without dead ends: 61009 [2020-12-22 08:25:58,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:25:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61009 states. [2020-12-22 08:26:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61009 to 16713. [2020-12-22 08:26:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16713 states. [2020-12-22 08:26:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16713 states to 16713 states and 23339 transitions. [2020-12-22 08:26:02,453 INFO L78 Accepts]: Start accepts. Automaton has 16713 states and 23339 transitions. Word has length 71 [2020-12-22 08:26:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:02,453 INFO L481 AbstractCegarLoop]: Abstraction has 16713 states and 23339 transitions. [2020-12-22 08:26:02,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:26:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 16713 states and 23339 transitions. [2020-12-22 08:26:02,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:26:02,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:02,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:26:02,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:26:02,462 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:02,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:02,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1951824160, now seen corresponding path program 1 times [2020-12-22 08:26:02,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:02,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752279621] [2020-12-22 08:26:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:02,979 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 08:26:02,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752279621] [2020-12-22 08:26:02,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:02,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-22 08:26:02,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935604477] [2020-12-22 08:26:02,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 08:26:02,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:02,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 08:26:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:26:02,981 INFO L87 Difference]: Start difference. First operand 16713 states and 23339 transitions. Second operand 13 states. [2020-12-22 08:26:03,331 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 08:26:03,538 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 08:26:03,777 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 08:26:04,348 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:26:04,629 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:26:32,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:32,159 INFO L93 Difference]: Finished difference Result 111099 states and 158435 transitions. [2020-12-22 08:26:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 08:26:32,160 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-12-22 08:26:32,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:32,274 INFO L225 Difference]: With dead ends: 111099 [2020-12-22 08:26:32,274 INFO L226 Difference]: Without dead ends: 97620 [2020-12-22 08:26:32,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-12-22 08:26:32,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97620 states. [2020-12-22 08:26:37,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97620 to 16586. [2020-12-22 08:26:37,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16586 states. [2020-12-22 08:26:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16586 states to 16586 states and 23155 transitions. [2020-12-22 08:26:37,797 INFO L78 Accepts]: Start accepts. Automaton has 16586 states and 23155 transitions. Word has length 72 [2020-12-22 08:26:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:37,797 INFO L481 AbstractCegarLoop]: Abstraction has 16586 states and 23155 transitions. [2020-12-22 08:26:37,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 08:26:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 16586 states and 23155 transitions. [2020-12-22 08:26:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:26:37,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:37,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:26:37,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:26:37,804 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:37,804 INFO L82 PathProgramCache]: Analyzing trace with hash -645372171, now seen corresponding path program 1 times [2020-12-22 08:26:37,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:37,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316495524] [2020-12-22 08:26:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:37,943 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 08:26:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316495524] [2020-12-22 08:26:37,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:37,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:26:37,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542783874] [2020-12-22 08:26:37,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:26:37,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:37,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:26:37,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:26:37,947 INFO L87 Difference]: Start difference. First operand 16586 states and 23155 transitions. Second operand 7 states. [2020-12-22 08:26:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:59,638 INFO L93 Difference]: Finished difference Result 68694 states and 96667 transitions. [2020-12-22 08:26:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:26:59,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 72 [2020-12-22 08:26:59,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:59,706 INFO L225 Difference]: With dead ends: 68694 [2020-12-22 08:26:59,706 INFO L226 Difference]: Without dead ends: 60828 [2020-12-22 08:26:59,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:26:59,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60828 states. [2020-12-22 08:27:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60828 to 16629. [2020-12-22 08:27:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16629 states. [2020-12-22 08:27:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16629 states to 16629 states and 23216 transitions. [2020-12-22 08:27:05,096 INFO L78 Accepts]: Start accepts. Automaton has 16629 states and 23216 transitions. Word has length 72 [2020-12-22 08:27:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:05,096 INFO L481 AbstractCegarLoop]: Abstraction has 16629 states and 23216 transitions. [2020-12-22 08:27:05,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:27:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 16629 states and 23216 transitions. [2020-12-22 08:27:05,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:27:05,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:05,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:05,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:27:05,111 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:05,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:05,111 INFO L82 PathProgramCache]: Analyzing trace with hash 216436712, now seen corresponding path program 1 times [2020-12-22 08:27:05,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:05,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843198324] [2020-12-22 08:27:05,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:05,315 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 08:27:05,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843198324] [2020-12-22 08:27:05,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:05,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:27:05,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334099129] [2020-12-22 08:27:05,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:27:05,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:05,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:27:05,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:27:05,317 INFO L87 Difference]: Start difference. First operand 16629 states and 23216 transitions. Second operand 10 states. [2020-12-22 08:27:31,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:31,432 INFO L93 Difference]: Finished difference Result 84833 states and 120391 transitions. [2020-12-22 08:27:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 08:27:31,433 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-12-22 08:27:31,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:31,517 INFO L225 Difference]: With dead ends: 84833 [2020-12-22 08:27:31,517 INFO L226 Difference]: Without dead ends: 71133 [2020-12-22 08:27:31,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:27:31,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71133 states.