/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 02:13:33,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 02:13:33,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 02:13:33,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 02:13:33,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 02:13:33,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 02:13:33,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 02:13:33,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 02:13:33,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 02:13:33,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 02:13:33,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 02:13:33,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 02:13:33,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 02:13:33,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 02:13:33,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 02:13:33,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 02:13:33,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 02:13:33,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 02:13:33,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 02:13:33,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 02:13:33,862 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 02:13:33,877 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 02:13:33,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 02:13:33,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 02:13:33,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 02:13:33,879 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 02:13:33,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 02:13:33,879 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 02:13:33,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 02:13:33,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 02:13:33,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 02:13:33,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 02:13:33,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 02:13:33,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 02:13:33,881 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 02:13:33,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 02:13:33,881 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 02:13:33,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 02:13:33,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 02:13:33,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 02:13:33,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 02:13:33,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 02:13:33,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 02:13:33,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 02:13:33,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 02:13:33,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 02:13:33,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 02:13:33,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 02:13:33,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 02:13:33,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 02:13:33,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 02:13:34,162 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 02:13:34,175 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 02:13:34,178 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 02:13:34,180 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 02:13:34,180 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 02:13:34,181 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 02:13:34,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71313b75a/3138b3c082f94f09a91de602977f0292/FLAG657111b79 [2020-07-20 02:13:34,867 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 02:13:34,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 02:13:34,888 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71313b75a/3138b3c082f94f09a91de602977f0292/FLAG657111b79 [2020-07-20 02:13:35,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71313b75a/3138b3c082f94f09a91de602977f0292 [2020-07-20 02:13:35,060 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 02:13:35,063 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 02:13:35,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 02:13:35,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 02:13:35,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 02:13:35,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:13:35" (1/1) ... [2020-07-20 02:13:35,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31188dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:13:35, skipping insertion in model container [2020-07-20 02:13:35,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:13:35" (1/1) ... [2020-07-20 02:13:35,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 02:13:35,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 02:13:36,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:13:36,156 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 02:13:36,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:13:36,737 INFO L208 MainTranslator]: Completed translation [2020-07-20 02:13:36,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:13:36 WrapperNode [2020-07-20 02:13:36,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 02:13:36,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 02:13:36,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 02:13:36,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 02:13:36,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:13:36" (1/1) ... [2020-07-20 02:13:36,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:13:36" (1/1) ... [2020-07-20 02:13:36,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:13:36" (1/1) ... [2020-07-20 02:13:36,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:13:36" (1/1) ... [2020-07-20 02:13:36,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:13:36" (1/1) ... [2020-07-20 02:13:36,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:13:36" (1/1) ... [2020-07-20 02:13:36,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:13:36" (1/1) ... [2020-07-20 02:13:36,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 02:13:36,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 02:13:36,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 02:13:36,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 02:13:36,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:13:36" (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 [2020-07-20 02:13:37,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 02:13:37,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 02:13:37,055 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 02:13:37,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 02:13:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 02:13:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 02:13:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 02:13:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 02:13:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 02:13:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 02:13:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 02:13:37,058 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 02:13:37,058 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 02:13:37,058 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 02:13:37,058 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 02:13:37,058 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 02:13:37,059 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 02:13:37,059 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 02:13:37,059 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 02:13:37,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 02:13:37,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 02:13:37,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 02:13:39,698 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 02:13:39,698 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 02:13:39,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:13:39 BoogieIcfgContainer [2020-07-20 02:13:39,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 02:13:39,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 02:13:39,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 02:13:39,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 02:13:39,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:13:35" (1/3) ... [2020-07-20 02:13:39,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a278fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:13:39, skipping insertion in model container [2020-07-20 02:13:39,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:13:36" (2/3) ... [2020-07-20 02:13:39,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a278fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:13:39, skipping insertion in model container [2020-07-20 02:13:39,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:13:39" (3/3) ... [2020-07-20 02:13:39,728 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 02:13:39,739 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 02:13:39,749 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 02:13:39,763 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 02:13:39,791 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 02:13:39,791 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 02:13:39,791 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 02:13:39,791 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 02:13:39,792 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 02:13:39,792 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 02:13:39,792 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 02:13:39,792 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 02:13:39,826 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-07-20 02:13:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 02:13:39,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:13:39,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:13:39,861 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:13:39,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:13:39,868 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-07-20 02:13:39,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:13:39,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798919752] [2020-07-20 02:13:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:13:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:13:41,689 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:13:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:13:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:13:41,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798919752] [2020-07-20 02:13:41,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:13:41,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:13:41,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656257034] [2020-07-20 02:13:41,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:13:41,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:13:41,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:13:41,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:13:41,943 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-07-20 02:13:42,693 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-20 02:13:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:13:47,688 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-07-20 02:13:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:13:47,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 02:13:47,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:13:47,732 INFO L225 Difference]: With dead ends: 1489 [2020-07-20 02:13:47,732 INFO L226 Difference]: Without dead ends: 1273 [2020-07-20 02:13:47,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:13:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-07-20 02:13:47,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-07-20 02:13:47,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-07-20 02:13:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-07-20 02:13:47,882 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-07-20 02:13:47,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:13:47,884 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-07-20 02:13:47,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:13:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-07-20 02:13:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 02:13:47,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:13:47,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:13:47,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 02:13:47,896 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:13:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:13:47,897 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-07-20 02:13:47,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:13:47,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277856608] [2020-07-20 02:13:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:13:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:13:48,971 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:13:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:13:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:13:49,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277856608] [2020-07-20 02:13:49,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:13:49,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:13:49,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579901471] [2020-07-20 02:13:49,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:13:49,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:13:49,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:13:49,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:13:49,278 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2020-07-20 02:13:49,803 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-20 02:13:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:13:54,059 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-07-20 02:13:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:13:54,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 02:13:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:13:54,074 INFO L225 Difference]: With dead ends: 2607 [2020-07-20 02:13:54,074 INFO L226 Difference]: Without dead ends: 2225 [2020-07-20 02:13:54,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:13:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-07-20 02:13:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-07-20 02:13:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-07-20 02:13:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-07-20 02:13:54,159 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-07-20 02:13:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:13:54,161 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-07-20 02:13:54,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:13:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-07-20 02:13:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 02:13:54,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:13:54,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:13:54,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 02:13:54,170 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:13:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:13:54,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-07-20 02:13:54,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:13:54,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138961748] [2020-07-20 02:13:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:13:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:13:54,991 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:13:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:13:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:13:55,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138961748] [2020-07-20 02:13:55,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:13:55,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:13:55,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997410455] [2020-07-20 02:13:55,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:13:55,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:13:55,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:13:55,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:13:55,172 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 4 states. [2020-07-20 02:13:55,649 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-20 02:13:59,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:13:59,924 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-07-20 02:13:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:13:59,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 02:13:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:13:59,947 INFO L225 Difference]: With dead ends: 4715 [2020-07-20 02:13:59,947 INFO L226 Difference]: Without dead ends: 4049 [2020-07-20 02:13:59,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:13:59,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-07-20 02:14:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-07-20 02:14:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-07-20 02:14:00,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-07-20 02:14:00,084 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-07-20 02:14:00,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:14:00,085 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-07-20 02:14:00,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:14:00,085 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-07-20 02:14:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 02:14:00,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:14:00,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:14:00,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 02:14:00,096 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:14:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:14:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-07-20 02:14:00,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:14:00,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265271340] [2020-07-20 02:14:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:14:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:01,076 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:14:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:14:01,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265271340] [2020-07-20 02:14:01,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:14:01,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:14:01,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266720538] [2020-07-20 02:14:01,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:14:01,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:14:01,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:14:01,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:14:01,327 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 5 states. [2020-07-20 02:14:08,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:14:08,204 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-07-20 02:14:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:14:08,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2020-07-20 02:14:08,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:14:08,240 INFO L225 Difference]: With dead ends: 11998 [2020-07-20 02:14:08,241 INFO L226 Difference]: Without dead ends: 7966 [2020-07-20 02:14:08,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:14:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-07-20 02:14:08,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-07-20 02:14:08,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-07-20 02:14:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-07-20 02:14:08,569 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-07-20 02:14:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:14:08,570 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-07-20 02:14:08,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:14:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-07-20 02:14:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 02:14:08,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:14:08,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:14:08,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 02:14:08,590 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:14:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:14:08,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-07-20 02:14:08,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:14:08,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942958242] [2020-07-20 02:14:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:14:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:09,254 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:14:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:14:09,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942958242] [2020-07-20 02:14:09,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:14:09,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:14:09,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815178224] [2020-07-20 02:14:09,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:14:09,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:14:09,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:14:09,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:14:09,467 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 4 states. [2020-07-20 02:14:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:14:17,154 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-07-20 02:14:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:14:17,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-20 02:14:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:14:17,215 INFO L225 Difference]: With dead ends: 23441 [2020-07-20 02:14:17,216 INFO L226 Difference]: Without dead ends: 15606 [2020-07-20 02:14:17,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:14:17,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-07-20 02:14:17,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-07-20 02:14:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-07-20 02:14:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-07-20 02:14:17,808 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-07-20 02:14:17,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:14:17,808 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-07-20 02:14:17,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:14:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-07-20 02:14:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 02:14:17,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:14:17,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:14:17,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 02:14:17,840 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:14:17,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:14:17,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-07-20 02:14:17,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:14:17,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020130847] [2020-07-20 02:14:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:14:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:18,505 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:14:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:14:18,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020130847] [2020-07-20 02:14:18,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:14:18,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:14:18,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099592571] [2020-07-20 02:14:18,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:14:18,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:14:18,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:14:18,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:14:18,618 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 4 states. [2020-07-20 02:14:26,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:14:26,736 INFO L93 Difference]: Finished difference Result 46737 states and 71555 transitions. [2020-07-20 02:14:26,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:14:26,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-20 02:14:26,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:14:26,806 INFO L225 Difference]: With dead ends: 46737 [2020-07-20 02:14:26,807 INFO L226 Difference]: Without dead ends: 31175 [2020-07-20 02:14:26,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:14:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2020-07-20 02:14:27,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 15623. [2020-07-20 02:14:27,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15623 states. [2020-07-20 02:14:27,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 23921 transitions. [2020-07-20 02:14:27,604 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 23921 transitions. Word has length 328 [2020-07-20 02:14:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:14:27,605 INFO L479 AbstractCegarLoop]: Abstraction has 15623 states and 23921 transitions. [2020-07-20 02:14:27,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:14:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 23921 transitions. [2020-07-20 02:14:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-20 02:14:27,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:14:27,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:14:27,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 02:14:27,635 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:14:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:14:27,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1133119755, now seen corresponding path program 1 times [2020-07-20 02:14:27,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:14:27,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622722801] [2020-07-20 02:14:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:14:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:28,124 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:14:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:14:28,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622722801] [2020-07-20 02:14:28,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:14:28,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:14:28,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037965365] [2020-07-20 02:14:28,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:14:28,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:14:28,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:14:28,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:14:28,890 INFO L87 Difference]: Start difference. First operand 15623 states and 23921 transitions. Second operand 4 states. [2020-07-20 02:14:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:14:37,063 INFO L93 Difference]: Finished difference Result 46756 states and 71576 transitions. [2020-07-20 02:14:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:14:37,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-07-20 02:14:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:14:37,126 INFO L225 Difference]: With dead ends: 46756 [2020-07-20 02:14:37,126 INFO L226 Difference]: Without dead ends: 31193 [2020-07-20 02:14:37,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:14:37,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31193 states. [2020-07-20 02:14:37,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31193 to 15641. [2020-07-20 02:14:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15641 states. [2020-07-20 02:14:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15641 states to 15641 states and 23942 transitions. [2020-07-20 02:14:37,892 INFO L78 Accepts]: Start accepts. Automaton has 15641 states and 23942 transitions. Word has length 329 [2020-07-20 02:14:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:14:37,892 INFO L479 AbstractCegarLoop]: Abstraction has 15641 states and 23942 transitions. [2020-07-20 02:14:37,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:14:37,892 INFO L276 IsEmpty]: Start isEmpty. Operand 15641 states and 23942 transitions. [2020-07-20 02:14:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 02:14:37,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:14:37,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:14:37,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 02:14:37,916 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:14:37,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:14:37,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1733447043, now seen corresponding path program 1 times [2020-07-20 02:14:37,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:14:37,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262073779] [2020-07-20 02:14:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:14:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:38,497 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:14:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:14:38,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262073779] [2020-07-20 02:14:38,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:14:38,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:14:38,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630869045] [2020-07-20 02:14:38,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:14:38,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:14:38,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:14:38,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:14:38,665 INFO L87 Difference]: Start difference. First operand 15641 states and 23942 transitions. Second operand 4 states. [2020-07-20 02:14:46,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:14:46,960 INFO L93 Difference]: Finished difference Result 44290 states and 67647 transitions. [2020-07-20 02:14:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:14:46,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 02:14:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:14:47,008 INFO L225 Difference]: With dead ends: 44290 [2020-07-20 02:14:47,008 INFO L226 Difference]: Without dead ends: 28894 [2020-07-20 02:14:47,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:14:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28894 states. [2020-07-20 02:14:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28894 to 28892. [2020-07-20 02:14:48,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28892 states. [2020-07-20 02:14:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28892 states to 28892 states and 43902 transitions. [2020-07-20 02:14:48,192 INFO L78 Accepts]: Start accepts. Automaton has 28892 states and 43902 transitions. Word has length 330 [2020-07-20 02:14:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:14:48,192 INFO L479 AbstractCegarLoop]: Abstraction has 28892 states and 43902 transitions. [2020-07-20 02:14:48,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:14:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 28892 states and 43902 transitions. [2020-07-20 02:14:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 02:14:48,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:14:48,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:14:48,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 02:14:48,228 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:14:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:14:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2142783200, now seen corresponding path program 1 times [2020-07-20 02:14:48,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:14:48,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785492313] [2020-07-20 02:14:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:14:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:49,000 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:14:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:14:49,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785492313] [2020-07-20 02:14:49,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:14:49,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:14:49,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66866259] [2020-07-20 02:14:49,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:14:49,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:14:49,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:14:49,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:14:49,115 INFO L87 Difference]: Start difference. First operand 28892 states and 43902 transitions. Second operand 5 states. [2020-07-20 02:14:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:14:55,599 INFO L93 Difference]: Finished difference Result 59161 states and 89885 transitions. [2020-07-20 02:14:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:14:55,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-07-20 02:14:55,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:14:55,647 INFO L225 Difference]: With dead ends: 59161 [2020-07-20 02:14:55,647 INFO L226 Difference]: Without dead ends: 29761 [2020-07-20 02:14:55,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:14:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29761 states. [2020-07-20 02:14:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29761 to 29759. [2020-07-20 02:14:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29759 states. [2020-07-20 02:14:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29759 states to 29759 states and 45040 transitions. [2020-07-20 02:14:56,927 INFO L78 Accepts]: Start accepts. Automaton has 29759 states and 45040 transitions. Word has length 330 [2020-07-20 02:14:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:14:56,927 INFO L479 AbstractCegarLoop]: Abstraction has 29759 states and 45040 transitions. [2020-07-20 02:14:56,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:14:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 29759 states and 45040 transitions. [2020-07-20 02:14:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 02:14:56,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:14:56,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:14:56,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 02:14:56,950 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:14:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:14:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash 82673009, now seen corresponding path program 1 times [2020-07-20 02:14:56,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:14:56,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341643051] [2020-07-20 02:14:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:14:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:57,513 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:14:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:14:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:14:57,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341643051] [2020-07-20 02:14:57,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:14:57,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:14:57,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160148866] [2020-07-20 02:14:57,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:14:57,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:14:57,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:14:57,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:14:57,603 INFO L87 Difference]: Start difference. First operand 29759 states and 45040 transitions. Second operand 4 states. [2020-07-20 02:15:04,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:15:04,841 INFO L93 Difference]: Finished difference Result 70125 states and 107206 transitions. [2020-07-20 02:15:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:15:04,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-20 02:15:04,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:15:04,887 INFO L225 Difference]: With dead ends: 70125 [2020-07-20 02:15:04,888 INFO L226 Difference]: Without dead ends: 42593 [2020-07-20 02:15:04,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:04,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42593 states. [2020-07-20 02:15:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42593 to 37231. [2020-07-20 02:15:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37231 states. [2020-07-20 02:15:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37231 states to 37231 states and 57292 transitions. [2020-07-20 02:15:06,444 INFO L78 Accepts]: Start accepts. Automaton has 37231 states and 57292 transitions. Word has length 331 [2020-07-20 02:15:06,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:15:06,445 INFO L479 AbstractCegarLoop]: Abstraction has 37231 states and 57292 transitions. [2020-07-20 02:15:06,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:15:06,445 INFO L276 IsEmpty]: Start isEmpty. Operand 37231 states and 57292 transitions. [2020-07-20 02:15:06,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 02:15:06,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:15:06,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:15:06,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 02:15:06,468 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:15:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:15:06,468 INFO L82 PathProgramCache]: Analyzing trace with hash 942168383, now seen corresponding path program 1 times [2020-07-20 02:15:06,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:15:06,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3767527] [2020-07-20 02:15:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:15:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:06,975 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:15:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:15:07,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3767527] [2020-07-20 02:15:07,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:15:07,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:15:07,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484945991] [2020-07-20 02:15:07,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:15:07,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:15:07,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:15:07,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:07,090 INFO L87 Difference]: Start difference. First operand 37231 states and 57292 transitions. Second operand 4 states. [2020-07-20 02:15:13,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:15:13,804 INFO L93 Difference]: Finished difference Result 110821 states and 170399 transitions. [2020-07-20 02:15:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:15:13,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 02:15:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:15:13,891 INFO L225 Difference]: With dead ends: 110821 [2020-07-20 02:15:13,891 INFO L226 Difference]: Without dead ends: 74043 [2020-07-20 02:15:13,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74043 states. [2020-07-20 02:15:15,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74043 to 37289. [2020-07-20 02:15:15,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37289 states. [2020-07-20 02:15:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37289 states to 37289 states and 57367 transitions. [2020-07-20 02:15:15,922 INFO L78 Accepts]: Start accepts. Automaton has 37289 states and 57367 transitions. Word has length 332 [2020-07-20 02:15:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:15:15,922 INFO L479 AbstractCegarLoop]: Abstraction has 37289 states and 57367 transitions. [2020-07-20 02:15:15,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:15:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 37289 states and 57367 transitions. [2020-07-20 02:15:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 02:15:15,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:15:15,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:15:15,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 02:15:15,950 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:15:15,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:15:15,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1231527171, now seen corresponding path program 1 times [2020-07-20 02:15:15,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:15:15,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015002698] [2020-07-20 02:15:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:15:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:16,626 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:15:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:15:16,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015002698] [2020-07-20 02:15:16,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:15:16,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:15:16,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873315540] [2020-07-20 02:15:16,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:15:16,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:15:16,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:15:16,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:16,768 INFO L87 Difference]: Start difference. First operand 37289 states and 57367 transitions. Second operand 4 states. [2020-07-20 02:15:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:15:28,094 INFO L93 Difference]: Finished difference Result 109952 states and 168910 transitions. [2020-07-20 02:15:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:15:28,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 02:15:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:15:28,188 INFO L225 Difference]: With dead ends: 109952 [2020-07-20 02:15:28,188 INFO L226 Difference]: Without dead ends: 72948 [2020-07-20 02:15:28,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:15:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72948 states. [2020-07-20 02:15:31,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72948 to 72946. [2020-07-20 02:15:31,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72946 states. [2020-07-20 02:15:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72946 states to 72946 states and 111466 transitions. [2020-07-20 02:15:31,218 INFO L78 Accepts]: Start accepts. Automaton has 72946 states and 111466 transitions. Word has length 332 [2020-07-20 02:15:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:15:31,219 INFO L479 AbstractCegarLoop]: Abstraction has 72946 states and 111466 transitions. [2020-07-20 02:15:31,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:15:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 72946 states and 111466 transitions. [2020-07-20 02:15:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 02:15:31,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:15:31,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:15:31,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 02:15:31,259 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:15:31,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:15:31,259 INFO L82 PathProgramCache]: Analyzing trace with hash 574493146, now seen corresponding path program 1 times [2020-07-20 02:15:31,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:15:31,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097578487] [2020-07-20 02:15:31,260 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:15:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:32,059 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:15:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:15:32,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097578487] [2020-07-20 02:15:32,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:15:32,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:15:32,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218604480] [2020-07-20 02:15:32,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:15:32,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:15:32,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:15:32,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:15:32,168 INFO L87 Difference]: Start difference. First operand 72946 states and 111466 transitions. Second operand 5 states. [2020-07-20 02:15:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:15:42,663 INFO L93 Difference]: Finished difference Result 149624 states and 228357 transitions. [2020-07-20 02:15:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:15:42,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2020-07-20 02:15:42,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:15:42,748 INFO L225 Difference]: With dead ends: 149624 [2020-07-20 02:15:42,748 INFO L226 Difference]: Without dead ends: 75480 [2020-07-20 02:15:42,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:15:42,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75480 states. [2020-07-20 02:15:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75480 to 75478. [2020-07-20 02:15:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75478 states. [2020-07-20 02:15:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75478 states to 75478 states and 114725 transitions. [2020-07-20 02:15:46,015 INFO L78 Accepts]: Start accepts. Automaton has 75478 states and 114725 transitions. Word has length 332 [2020-07-20 02:15:46,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:15:46,015 INFO L479 AbstractCegarLoop]: Abstraction has 75478 states and 114725 transitions. [2020-07-20 02:15:46,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:15:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 75478 states and 114725 transitions. [2020-07-20 02:15:46,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 02:15:46,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:15:46,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:15:46,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 02:15:46,060 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:15:46,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:15:46,060 INFO L82 PathProgramCache]: Analyzing trace with hash -234242260, now seen corresponding path program 1 times [2020-07-20 02:15:46,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:15:46,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960808337] [2020-07-20 02:15:46,061 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:15:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:46,885 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:15:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:15:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:15:47,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960808337] [2020-07-20 02:15:47,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:15:47,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:15:47,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380843108] [2020-07-20 02:15:47,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:15:47,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:15:47,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:15:47,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:15:47,007 INFO L87 Difference]: Start difference. First operand 75478 states and 114725 transitions. Second operand 5 states. [2020-07-20 02:16:08,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:16:08,176 INFO L93 Difference]: Finished difference Result 284853 states and 432320 transitions. [2020-07-20 02:16:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 02:16:08,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2020-07-20 02:16:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:16:08,482 INFO L225 Difference]: With dead ends: 284853 [2020-07-20 02:16:08,483 INFO L226 Difference]: Without dead ends: 211355 [2020-07-20 02:16:08,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:16:08,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211355 states. [2020-07-20 02:16:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211355 to 76005. [2020-07-20 02:16:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76005 states. [2020-07-20 02:16:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76005 states to 76005 states and 115485 transitions. [2020-07-20 02:16:15,956 INFO L78 Accepts]: Start accepts. Automaton has 76005 states and 115485 transitions. Word has length 332 [2020-07-20 02:16:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:16:15,957 INFO L479 AbstractCegarLoop]: Abstraction has 76005 states and 115485 transitions. [2020-07-20 02:16:15,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:16:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 76005 states and 115485 transitions. [2020-07-20 02:16:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 02:16:15,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:16:15,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:16:15,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 02:16:15,995 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:16:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:16:15,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1874773864, now seen corresponding path program 1 times [2020-07-20 02:16:15,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:16:15,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009674523] [2020-07-20 02:16:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:16:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:16,812 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:16:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:16:16,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009674523] [2020-07-20 02:16:16,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:16:16,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:16:16,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805709358] [2020-07-20 02:16:16,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:16:16,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:16:16,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:16:16,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:16,930 INFO L87 Difference]: Start difference. First operand 76005 states and 115485 transitions. Second operand 4 states. [2020-07-20 02:16:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:16:29,349 INFO L93 Difference]: Finished difference Result 186495 states and 285121 transitions. [2020-07-20 02:16:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:16:29,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 02:16:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:16:29,495 INFO L225 Difference]: With dead ends: 186495 [2020-07-20 02:16:29,496 INFO L226 Difference]: Without dead ends: 118775 [2020-07-20 02:16:29,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118775 states. [2020-07-20 02:16:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118775 to 102749. [2020-07-20 02:16:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102749 states. [2020-07-20 02:16:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102749 states to 102749 states and 158513 transitions. [2020-07-20 02:16:37,152 INFO L78 Accepts]: Start accepts. Automaton has 102749 states and 158513 transitions. Word has length 334 [2020-07-20 02:16:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:16:37,152 INFO L479 AbstractCegarLoop]: Abstraction has 102749 states and 158513 transitions. [2020-07-20 02:16:37,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:16:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 102749 states and 158513 transitions. [2020-07-20 02:16:37,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 02:16:37,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:16:37,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:16:37,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 02:16:37,190 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:16:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:16:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash -2052198596, now seen corresponding path program 1 times [2020-07-20 02:16:37,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:16:37,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59905451] [2020-07-20 02:16:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:16:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:37,695 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:16:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:16:37,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59905451] [2020-07-20 02:16:37,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:16:37,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:16:37,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133967737] [2020-07-20 02:16:37,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:16:37,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:16:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:16:37,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:37,799 INFO L87 Difference]: Start difference. First operand 102749 states and 158513 transitions. Second operand 4 states. [2020-07-20 02:16:58,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:16:58,461 INFO L93 Difference]: Finished difference Result 302297 states and 465959 transitions. [2020-07-20 02:16:58,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:16:58,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 02:16:58,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:16:58,783 INFO L225 Difference]: With dead ends: 302297 [2020-07-20 02:16:58,784 INFO L226 Difference]: Without dead ends: 202271 [2020-07-20 02:16:58,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202271 states. [2020-07-20 02:17:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202271 to 103017. [2020-07-20 02:17:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103017 states. [2020-07-20 02:17:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103017 states to 103017 states and 158873 transitions. [2020-07-20 02:17:06,286 INFO L78 Accepts]: Start accepts. Automaton has 103017 states and 158873 transitions. Word has length 334 [2020-07-20 02:17:06,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:17:06,287 INFO L479 AbstractCegarLoop]: Abstraction has 103017 states and 158873 transitions. [2020-07-20 02:17:06,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:17:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 103017 states and 158873 transitions. [2020-07-20 02:17:06,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 02:17:06,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:17:06,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:17:06,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 02:17:06,329 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:17:06,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:17:06,329 INFO L82 PathProgramCache]: Analyzing trace with hash 924020310, now seen corresponding path program 1 times [2020-07-20 02:17:06,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:17:06,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345571762] [2020-07-20 02:17:06,330 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:17:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:06,920 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:17:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:17:07,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345571762] [2020-07-20 02:17:07,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:17:07,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:17:07,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821102197] [2020-07-20 02:17:07,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 02:17:07,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:17:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 02:17:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:17:07,023 INFO L87 Difference]: Start difference. First operand 103017 states and 158873 transitions. Second operand 6 states. [2020-07-20 02:17:07,506 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 02:17:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:17:20,080 INFO L93 Difference]: Finished difference Result 198957 states and 307134 transitions. [2020-07-20 02:17:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 02:17:20,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-07-20 02:17:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:17:20,222 INFO L225 Difference]: With dead ends: 198957 [2020-07-20 02:17:20,222 INFO L226 Difference]: Without dead ends: 103017 [2020-07-20 02:17:20,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:17:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103017 states. [2020-07-20 02:17:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103017 to 103017. [2020-07-20 02:17:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103017 states. [2020-07-20 02:17:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103017 states to 103017 states and 157871 transitions. [2020-07-20 02:17:26,858 INFO L78 Accepts]: Start accepts. Automaton has 103017 states and 157871 transitions. Word has length 334 [2020-07-20 02:17:26,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:17:26,859 INFO L479 AbstractCegarLoop]: Abstraction has 103017 states and 157871 transitions. [2020-07-20 02:17:26,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 02:17:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand 103017 states and 157871 transitions. [2020-07-20 02:17:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 02:17:26,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:17:26,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:17:26,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 02:17:26,902 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:17:26,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:17:26,902 INFO L82 PathProgramCache]: Analyzing trace with hash 2073937905, now seen corresponding path program 1 times [2020-07-20 02:17:26,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:17:26,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105468447] [2020-07-20 02:17:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:17:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:27,654 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:17:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:17:27,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105468447] [2020-07-20 02:17:27,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:17:27,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:17:27,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698183828] [2020-07-20 02:17:27,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:17:27,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:17:27,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:17:27,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:17:27,843 INFO L87 Difference]: Start difference. First operand 103017 states and 157871 transitions. Second operand 5 states. [2020-07-20 02:17:49,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:17:49,683 INFO L93 Difference]: Finished difference Result 304088 states and 465970 transitions. [2020-07-20 02:17:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:17:49,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-20 02:17:49,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:17:49,967 INFO L225 Difference]: With dead ends: 304088 [2020-07-20 02:17:49,967 INFO L226 Difference]: Without dead ends: 201844 [2020-07-20 02:17:50,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:17:50,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201844 states. [2020-07-20 02:18:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201844 to 201842. [2020-07-20 02:18:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201842 states. [2020-07-20 02:18:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201842 states to 201842 states and 308017 transitions. [2020-07-20 02:18:07,705 INFO L78 Accepts]: Start accepts. Automaton has 201842 states and 308017 transitions. Word has length 334 [2020-07-20 02:18:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:18:07,706 INFO L479 AbstractCegarLoop]: Abstraction has 201842 states and 308017 transitions. [2020-07-20 02:18:07,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:18:07,706 INFO L276 IsEmpty]: Start isEmpty. Operand 201842 states and 308017 transitions. [2020-07-20 02:18:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 02:18:07,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:18:07,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:18:07,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-20 02:18:07,783 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:18:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:18:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash -860846706, now seen corresponding path program 1 times [2020-07-20 02:18:07,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:18:07,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688868233] [2020-07-20 02:18:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:18:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:08,314 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:18:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:18:08,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688868233] [2020-07-20 02:18:08,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:18:08,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:18:08,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593682905] [2020-07-20 02:18:08,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:18:08,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:18:08,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:18:08,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:18:08,390 INFO L87 Difference]: Start difference. First operand 201842 states and 308017 transitions. Second operand 4 states. [2020-07-20 02:18:48,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:18:48,576 INFO L93 Difference]: Finished difference Result 594866 states and 907239 transitions. [2020-07-20 02:18:48,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:18:48,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-20 02:18:48,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:18:49,156 INFO L225 Difference]: With dead ends: 594866 [2020-07-20 02:18:49,156 INFO L226 Difference]: Without dead ends: 397812 [2020-07-20 02:18:49,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:18:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397812 states. [2020-07-20 02:19:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397812 to 202286. [2020-07-20 02:19:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202286 states. [2020-07-20 02:19:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202286 states to 202286 states and 308449 transitions. [2020-07-20 02:19:10,192 INFO L78 Accepts]: Start accepts. Automaton has 202286 states and 308449 transitions. Word has length 335 [2020-07-20 02:19:10,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:19:10,193 INFO L479 AbstractCegarLoop]: Abstraction has 202286 states and 308449 transitions. [2020-07-20 02:19:10,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:19:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 202286 states and 308449 transitions. [2020-07-20 02:19:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 02:19:10,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:19:10,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:19:10,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-20 02:19:10,274 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:19:10,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:19:10,275 INFO L82 PathProgramCache]: Analyzing trace with hash 162534671, now seen corresponding path program 1 times [2020-07-20 02:19:10,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:19:10,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314857341] [2020-07-20 02:19:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:19:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:19:10,970 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:19:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:19:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:19:11,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314857341] [2020-07-20 02:19:11,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:19:11,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:19:11,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421092126] [2020-07-20 02:19:11,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:19:11,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:19:11,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:19:11,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:19:11,052 INFO L87 Difference]: Start difference. First operand 202286 states and 308449 transitions. Second operand 5 states. [2020-07-20 02:19:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:19:36,076 INFO L93 Difference]: Finished difference Result 293099 states and 446788 transitions. [2020-07-20 02:19:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:19:36,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-07-20 02:19:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:19:36,367 INFO L225 Difference]: With dead ends: 293099 [2020-07-20 02:19:36,367 INFO L226 Difference]: Without dead ends: 202288 [2020-07-20 02:19:36,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:19:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202288 states. [2020-07-20 02:19:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202288 to 198134. [2020-07-20 02:19:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198134 states. [2020-07-20 02:19:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198134 states to 198134 states and 302472 transitions. [2020-07-20 02:19:56,348 INFO L78 Accepts]: Start accepts. Automaton has 198134 states and 302472 transitions. Word has length 336 [2020-07-20 02:19:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:19:56,348 INFO L479 AbstractCegarLoop]: Abstraction has 198134 states and 302472 transitions. [2020-07-20 02:19:56,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:19:56,348 INFO L276 IsEmpty]: Start isEmpty. Operand 198134 states and 302472 transitions. [2020-07-20 02:19:56,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 02:19:56,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:19:56,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:19:56,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-20 02:19:56,423 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:19:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:19:56,424 INFO L82 PathProgramCache]: Analyzing trace with hash 159027383, now seen corresponding path program 1 times [2020-07-20 02:19:56,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:19:56,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560704631] [2020-07-20 02:19:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:19:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:19:57,031 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:19:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:19:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:19:57,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560704631] [2020-07-20 02:19:57,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:19:57,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:19:57,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679164139] [2020-07-20 02:19:57,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:19:57,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:19:57,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:19:57,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:19:57,135 INFO L87 Difference]: Start difference. First operand 198134 states and 302472 transitions. Second operand 4 states. [2020-07-20 02:20:40,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:20:40,371 INFO L93 Difference]: Finished difference Result 578975 states and 882497 transitions. [2020-07-20 02:20:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:20:40,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-20 02:20:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:20:40,951 INFO L225 Difference]: With dead ends: 578975 [2020-07-20 02:20:40,952 INFO L226 Difference]: Without dead ends: 385629 [2020-07-20 02:20:41,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:20:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385629 states. [2020-07-20 02:21:17,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385629 to 385627. [2020-07-20 02:21:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385627 states. [2020-07-20 02:21:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385627 states to 385627 states and 584899 transitions. [2020-07-20 02:21:17,685 INFO L78 Accepts]: Start accepts. Automaton has 385627 states and 584899 transitions. Word has length 338 [2020-07-20 02:21:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:21:17,685 INFO L479 AbstractCegarLoop]: Abstraction has 385627 states and 584899 transitions. [2020-07-20 02:21:17,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:21:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 385627 states and 584899 transitions. [2020-07-20 02:21:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 02:21:17,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:21:17,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:21:17,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-20 02:21:17,842 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:21:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:21:17,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1971664460, now seen corresponding path program 1 times [2020-07-20 02:21:17,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:21:17,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644038427] [2020-07-20 02:21:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:21:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:21:18,358 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:21:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:21:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:21:18,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644038427] [2020-07-20 02:21:18,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:21:18,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:21:18,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259996521] [2020-07-20 02:21:18,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:21:18,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:21:18,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:21:18,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:21:18,426 INFO L87 Difference]: Start difference. First operand 385627 states and 584899 transitions. Second operand 4 states. [2020-07-20 02:22:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:22:39,915 INFO L93 Difference]: Finished difference Result 1150993 states and 1745423 transitions. [2020-07-20 02:22:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:22:39,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-20 02:22:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:22:41,084 INFO L225 Difference]: With dead ends: 1150993 [2020-07-20 02:22:41,084 INFO L226 Difference]: Without dead ends: 767510 [2020-07-20 02:22:41,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:22:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767510 states. [2020-07-20 02:23:26,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767510 to 386115. [2020-07-20 02:23:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386115 states. [2020-07-20 02:23:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386115 states to 386115 states and 585417 transitions. [2020-07-20 02:23:27,429 INFO L78 Accepts]: Start accepts. Automaton has 386115 states and 585417 transitions. Word has length 339 [2020-07-20 02:23:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:23:27,429 INFO L479 AbstractCegarLoop]: Abstraction has 386115 states and 585417 transitions. [2020-07-20 02:23:27,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:23:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 386115 states and 585417 transitions. [2020-07-20 02:23:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 02:23:27,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:23:27,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:23:27,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-20 02:23:27,604 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:23:27,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:23:27,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1127711503, now seen corresponding path program 1 times [2020-07-20 02:23:27,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:23:27,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145722853] [2020-07-20 02:23:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:23:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:23:28,325 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:23:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:23:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:23:28,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145722853] [2020-07-20 02:23:28,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:23:28,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:23:28,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355050546] [2020-07-20 02:23:28,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:23:28,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:23:28,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:23:28,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:23:28,404 INFO L87 Difference]: Start difference. First operand 386115 states and 585417 transitions. Second operand 5 states. [2020-07-20 02:24:18,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:24:18,568 INFO L93 Difference]: Finished difference Result 784450 states and 1187788 transitions. [2020-07-20 02:24:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:24:18,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 340 [2020-07-20 02:24:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:24:19,161 INFO L225 Difference]: With dead ends: 784450 [2020-07-20 02:24:19,161 INFO L226 Difference]: Without dead ends: 393631 [2020-07-20 02:24:19,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:24:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393631 states. [2020-07-20 02:25:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393631 to 393629. [2020-07-20 02:25:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393629 states. [2020-07-20 02:25:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393629 states to 393629 states and 593132 transitions. [2020-07-20 02:25:04,236 INFO L78 Accepts]: Start accepts. Automaton has 393629 states and 593132 transitions. Word has length 340 [2020-07-20 02:25:04,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:25:04,236 INFO L479 AbstractCegarLoop]: Abstraction has 393629 states and 593132 transitions. [2020-07-20 02:25:04,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:25:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 393629 states and 593132 transitions. [2020-07-20 02:25:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 02:25:05,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:25:05,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:25:05,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-20 02:25:05,019 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:25:05,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:25:05,019 INFO L82 PathProgramCache]: Analyzing trace with hash -542661021, now seen corresponding path program 1 times [2020-07-20 02:25:05,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:25:05,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66456186] [2020-07-20 02:25:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@233adf74 [2020-07-20 02:25:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:25:05,633 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 02:25:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:25:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:25:05,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66456186] [2020-07-20 02:25:05,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:25:05,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:25:05,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119679291] [2020-07-20 02:25:05,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:25:05,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:25:05,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:25:05,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:25:05,732 INFO L87 Difference]: Start difference. First operand 393629 states and 593132 transitions. Second operand 4 states.