/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_FUNCTIONS --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/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:40:44,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:40:44,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:40:44,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:40:44,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:40:44,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:40:44,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:40:44,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:40:44,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:40:44,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:40:44,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:40:44,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:40:44,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:40:44,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:40:44,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:40:44,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:40:44,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:40:44,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:40:44,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:40:44,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:40:44,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:40:44,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:40:44,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:40:44,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:40:44,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 23:40:44,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 23:40:44,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 23:40:44,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 23:40:44,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 23:40:44,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-19 23:40:44,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:40:44,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:40:44,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:40:44,151 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 [2020-07-19 23:40:44,186 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:40:44,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:40:44,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:40:44,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:40:44,193 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:40:44,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:40:44,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:40:44,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:40:44,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:40:44,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:40:44,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:40:44,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:40:44,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:40:44,196 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:40:44,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:40:44,197 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:40:44,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:40:44,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:40:44,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:40:44,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:40:44,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:40:44,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:40:44,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:40:44,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:40:44,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:40:44,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:40:44,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:40:44,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:40:44,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:40:44,201 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_FUNCTIONS 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 [2020-07-19 23:40:44,544 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:40:44,576 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:40:44,579 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:40:44,581 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:40:44,584 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:40:44,586 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-19 23:40:44,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660ae2b95/d7ca7b6ebb064972b978ef6e878ece3e/FLAG5afc553d3 [2020-07-19 23:40:45,301 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:40:45,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-19 23:40:45,322 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660ae2b95/d7ca7b6ebb064972b978ef6e878ece3e/FLAG5afc553d3 [2020-07-19 23:40:45,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660ae2b95/d7ca7b6ebb064972b978ef6e878ece3e [2020-07-19 23:40:45,588 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:40:45,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:40:45,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:40:45,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:40:45,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:40:45,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:40:45" (1/1) ... [2020-07-19 23:40:45,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cee54b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:45, skipping insertion in model container [2020-07-19 23:40:45,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:40:45" (1/1) ... [2020-07-19 23:40:45,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:40:45,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:40:45,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:40:45,892 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:40:46,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:40:46,058 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:40:46,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:46 WrapperNode [2020-07-19 23:40:46,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:40:46,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:40:46,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:40:46,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:40:46,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:46" (1/1) ... [2020-07-19 23:40:46,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:46" (1/1) ... [2020-07-19 23:40:46,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:46" (1/1) ... [2020-07-19 23:40:46,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:46" (1/1) ... [2020-07-19 23:40:46,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:46" (1/1) ... [2020-07-19 23:40:46,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:46" (1/1) ... [2020-07-19 23:40:46,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:46" (1/1) ... [2020-07-19 23:40:46,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:40:46,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:40:46,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:40:46,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:40:46,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:46" (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 [2020-07-19 23:40:46,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:40:46,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:40:46,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:40:46,206 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-07-19 23:40:46,206 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-07-19 23:40:46,206 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:40:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:40:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:40:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-07-19 23:40:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-07-19 23:40:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-07-19 23:40:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-07-19 23:40:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-07-19 23:40:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-07-19 23:40:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-07-19 23:40:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-07-19 23:40:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-19 23:40:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-07-19 23:40:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-07-19 23:40:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-07-19 23:40:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-07-19 23:40:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-19 23:40:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-07-19 23:40:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-07-19 23:40:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-07-19 23:40:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-07-19 23:40:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-07-19 23:40:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-07-19 23:40:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-07-19 23:40:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-07-19 23:40:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-07-19 23:40:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-07-19 23:40:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-07-19 23:40:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-07-19 23:40:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 23:40:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:40:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 23:40:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 23:40:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:40:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:40:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:40:46,772 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:40:46,772 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-19 23:40:46,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:40:46 BoogieIcfgContainer [2020-07-19 23:40:46,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:40:46,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:40:46,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:40:46,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:40:46,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:40:45" (1/3) ... [2020-07-19 23:40:46,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6344eb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:40:46, skipping insertion in model container [2020-07-19 23:40:46,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:46" (2/3) ... [2020-07-19 23:40:46,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6344eb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:40:46, skipping insertion in model container [2020-07-19 23:40:46,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:40:46" (3/3) ... [2020-07-19 23:40:46,793 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-19 23:40:46,807 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:40:46,814 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:40:46,832 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:40:46,869 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:40:46,869 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:40:46,869 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:40:46,870 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:40:46,870 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:40:46,870 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:40:46,871 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:40:46,871 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:40:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-07-19 23:40:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-19 23:40:46,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:46,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:40:46,909 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:46,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:46,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-07-19 23:40:46,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:46,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122975761] [2020-07-19 23:40:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d7f12 [2020-07-19 23:40:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:47,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122975761] [2020-07-19 23:40:47,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:40:47,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 23:40:47,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811786240] [2020-07-19 23:40:47,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:40:47,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:47,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:40:47,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:40:47,236 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-07-19 23:40:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:47,437 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-07-19 23:40:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:40:47,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-19 23:40:47,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:47,448 INFO L225 Difference]: With dead ends: 93 [2020-07-19 23:40:47,449 INFO L226 Difference]: Without dead ends: 43 [2020-07-19 23:40:47,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:40:47,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-19 23:40:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-19 23:40:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-19 23:40:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-07-19 23:40:47,510 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-07-19 23:40:47,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:47,511 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-07-19 23:40:47,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:40:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-07-19 23:40:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-19 23:40:47,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:47,513 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] [2020-07-19 23:40:47,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:40:47,514 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:47,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:47,514 INFO L82 PathProgramCache]: Analyzing trace with hash -171780126, now seen corresponding path program 1 times [2020-07-19 23:40:47,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:47,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792470673] [2020-07-19 23:40:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d7f12 [2020-07-19 23:40:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:47,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792470673] [2020-07-19 23:40:47,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:40:47,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:40:47,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442616309] [2020-07-19 23:40:47,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:40:47,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:47,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:40:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:40:47,658 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-07-19 23:40:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:47,837 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-07-19 23:40:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:40:47,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-07-19 23:40:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:47,840 INFO L225 Difference]: With dead ends: 78 [2020-07-19 23:40:47,840 INFO L226 Difference]: Without dead ends: 44 [2020-07-19 23:40:47,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:40:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-19 23:40:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-19 23:40:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-19 23:40:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-07-19 23:40:47,851 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2020-07-19 23:40:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:47,852 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-07-19 23:40:47,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:40:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-07-19 23:40:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-19 23:40:47,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:47,854 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] [2020-07-19 23:40:47,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:40:47,854 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:47,855 INFO L82 PathProgramCache]: Analyzing trace with hash 250921700, now seen corresponding path program 1 times [2020-07-19 23:40:47,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:47,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747202004] [2020-07-19 23:40:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d7f12 [2020-07-19 23:40:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:48,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747202004] [2020-07-19 23:40:48,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:40:48,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-19 23:40:48,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554489128] [2020-07-19 23:40:48,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:40:48,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:40:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:40:48,073 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-07-19 23:40:48,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:48,478 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2020-07-19 23:40:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:40:48,478 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-07-19 23:40:48,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:48,489 INFO L225 Difference]: With dead ends: 140 [2020-07-19 23:40:48,489 INFO L226 Difference]: Without dead ends: 91 [2020-07-19 23:40:48,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:40:48,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-19 23:40:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-07-19 23:40:48,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-19 23:40:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-07-19 23:40:48,518 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 33 [2020-07-19 23:40:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:48,519 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-07-19 23:40:48,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:40:48,519 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-07-19 23:40:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-19 23:40:48,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:48,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:40:48,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 23:40:48,521 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1743223006, now seen corresponding path program 1 times [2020-07-19 23:40:48,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:48,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389017254] [2020-07-19 23:40:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d7f12 [2020-07-19 23:40:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:48,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389017254] [2020-07-19 23:40:48,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:40:48,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-19 23:40:48,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316729698] [2020-07-19 23:40:48,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:40:48,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:48,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:40:48,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:40:48,679 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 7 states. [2020-07-19 23:40:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:48,965 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2020-07-19 23:40:48,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:40:48,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-07-19 23:40:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:48,972 INFO L225 Difference]: With dead ends: 136 [2020-07-19 23:40:48,974 INFO L226 Difference]: Without dead ends: 92 [2020-07-19 23:40:48,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:40:48,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-19 23:40:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-07-19 23:40:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-19 23:40:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-07-19 23:40:49,006 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 33 [2020-07-19 23:40:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:49,008 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-07-19 23:40:49,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:40:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-07-19 23:40:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-19 23:40:49,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:49,012 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] [2020-07-19 23:40:49,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 23:40:49,013 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:49,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1042158428, now seen corresponding path program 1 times [2020-07-19 23:40:49,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:49,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255654179] [2020-07-19 23:40:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d7f12 [2020-07-19 23:40:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:49,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255654179] [2020-07-19 23:40:49,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:40:49,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 23:40:49,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245630163] [2020-07-19 23:40:49,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:40:49,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:49,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:40:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:40:49,185 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 6 states. [2020-07-19 23:40:49,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:49,455 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2020-07-19 23:40:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:40:49,456 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-07-19 23:40:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:49,457 INFO L225 Difference]: With dead ends: 138 [2020-07-19 23:40:49,458 INFO L226 Difference]: Without dead ends: 89 [2020-07-19 23:40:49,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:40:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-19 23:40:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-07-19 23:40:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-19 23:40:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-07-19 23:40:49,468 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 33 [2020-07-19 23:40:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:49,468 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-07-19 23:40:49,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:40:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-07-19 23:40:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-19 23:40:49,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:49,470 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] [2020-07-19 23:40:49,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-19 23:40:49,470 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:49,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:49,471 INFO L82 PathProgramCache]: Analyzing trace with hash -151257089, now seen corresponding path program 1 times [2020-07-19 23:40:49,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:49,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690412725] [2020-07-19 23:40:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d7f12 [2020-07-19 23:40:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:49,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690412725] [2020-07-19 23:40:49,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:40:49,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:40:49,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117142107] [2020-07-19 23:40:49,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:40:49,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:49,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:40:49,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:40:49,524 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 5 states. [2020-07-19 23:40:49,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:49,627 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2020-07-19 23:40:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:40:49,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-07-19 23:40:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:49,630 INFO L225 Difference]: With dead ends: 124 [2020-07-19 23:40:49,630 INFO L226 Difference]: Without dead ends: 89 [2020-07-19 23:40:49,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:40:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-19 23:40:49,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-07-19 23:40:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-19 23:40:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2020-07-19 23:40:49,640 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 35 [2020-07-19 23:40:49,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:49,640 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2020-07-19 23:40:49,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:40:49,640 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2020-07-19 23:40:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-19 23:40:49,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:49,642 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] [2020-07-19 23:40:49,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 23:40:49,642 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:49,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:49,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1172325443, now seen corresponding path program 1 times [2020-07-19 23:40:49,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:49,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065410308] [2020-07-19 23:40:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d7f12 [2020-07-19 23:40:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:49,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065410308] [2020-07-19 23:40:49,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:40:49,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-19 23:40:49,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955474939] [2020-07-19 23:40:49,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:40:49,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:49,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:40:49,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:40:49,722 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 7 states. [2020-07-19 23:40:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:49,890 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2020-07-19 23:40:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:40:49,891 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-07-19 23:40:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:49,892 INFO L225 Difference]: With dead ends: 147 [2020-07-19 23:40:49,892 INFO L226 Difference]: Without dead ends: 89 [2020-07-19 23:40:49,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:40:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-19 23:40:49,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-07-19 23:40:49,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-19 23:40:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2020-07-19 23:40:49,901 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 35 [2020-07-19 23:40:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:49,901 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2020-07-19 23:40:49,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:40:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2020-07-19 23:40:49,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-19 23:40:49,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:49,902 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:40:49,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-19 23:40:49,903 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:49,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1310821647, now seen corresponding path program 1 times [2020-07-19 23:40:49,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:49,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390235311] [2020-07-19 23:40:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d7f12 [2020-07-19 23:40:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:40:50,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390235311] [2020-07-19 23:40:50,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:40:50,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-19 23:40:50,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631454880] [2020-07-19 23:40:50,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:40:50,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:50,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:40:50,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:40:50,007 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand 8 states. [2020-07-19 23:40:50,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:50,286 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2020-07-19 23:40:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:40:50,287 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-07-19 23:40:50,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:50,289 INFO L225 Difference]: With dead ends: 107 [2020-07-19 23:40:50,289 INFO L226 Difference]: Without dead ends: 105 [2020-07-19 23:40:50,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:40:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-19 23:40:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-07-19 23:40:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-19 23:40:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-07-19 23:40:50,302 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 38 [2020-07-19 23:40:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:50,303 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-07-19 23:40:50,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:40:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-07-19 23:40:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 23:40:50,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:50,306 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:40:50,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-19 23:40:50,306 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:50,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:50,307 INFO L82 PathProgramCache]: Analyzing trace with hash 888728936, now seen corresponding path program 1 times [2020-07-19 23:40:50,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:50,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883205107] [2020-07-19 23:40:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d7f12 [2020-07-19 23:40:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:50,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883205107] [2020-07-19 23:40:50,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291386876] [2020-07-19 23:40:50,466 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4916a43e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:40:50,563 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4916a43e issued 3 check-sat command(s) [2020-07-19 23:40:50,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:40:50,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:40:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:40:50,605 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 23:40:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:50,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:40:50,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2020-07-19 23:40:50,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706304296] [2020-07-19 23:40:50,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:40:50,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:50,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:40:50,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:40:50,614 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 8 states. [2020-07-19 23:40:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:50,840 INFO L93 Difference]: Finished difference Result 209 states and 263 transitions. [2020-07-19 23:40:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:40:50,841 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-07-19 23:40:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:50,846 INFO L225 Difference]: With dead ends: 209 [2020-07-19 23:40:50,847 INFO L226 Difference]: Without dead ends: 136 [2020-07-19 23:40:50,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:40:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-19 23:40:50,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2020-07-19 23:40:50,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-19 23:40:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2020-07-19 23:40:50,859 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 40 [2020-07-19 23:40:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:50,860 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2020-07-19 23:40:50,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:40:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2020-07-19 23:40:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-19 23:40:50,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:50,863 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:40:51,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 23:40:51,078 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:51,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:51,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 2 times [2020-07-19 23:40:51,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:51,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315895175] [2020-07-19 23:40:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d7f12 [2020-07-19 23:40:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:51,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315895175] [2020-07-19 23:40:51,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900645274] [2020-07-19 23:40:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2eab0f9e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:40:51,369 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2eab0f9e issued 4 check-sat command(s) [2020-07-19 23:40:51,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:40:51,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 23:40:51,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:40:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:51,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:40:51,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-07-19 23:40:51,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73126340] [2020-07-19 23:40:51,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 23:40:51,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 23:40:51,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:40:51,554 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 19 states. [2020-07-19 23:40:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:52,512 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2020-07-19 23:40:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 23:40:52,514 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-07-19 23:40:52,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:52,519 INFO L225 Difference]: With dead ends: 240 [2020-07-19 23:40:52,519 INFO L226 Difference]: Without dead ends: 189 [2020-07-19 23:40:52,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:40:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-07-19 23:40:52,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 127. [2020-07-19 23:40:52,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-07-19 23:40:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2020-07-19 23:40:52,546 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 45 [2020-07-19 23:40:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:52,549 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2020-07-19 23:40:52,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 23:40:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2020-07-19 23:40:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-19 23:40:52,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:52,561 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:40:52,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 23:40:52,775 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:52,776 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-07-19 23:40:52,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:52,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651019722] [2020-07-19 23:40:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d7f12 [2020-07-19 23:40:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:53,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651019722] [2020-07-19 23:40:53,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050023669] [2020-07-19 23:40:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@179389a9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:40:53,149 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@179389a9 issued 4 check-sat command(s) [2020-07-19 23:40:53,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:40:53,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:40:53,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:40:53,376 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 23:40:53,384 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 23:40:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:53,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:40:53,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2020-07-19 23:40:53,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274467996] [2020-07-19 23:40:53,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 23:40:53,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:53,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 23:40:53,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:40:53,433 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand 19 states. [2020-07-19 23:40:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:54,131 INFO L93 Difference]: Finished difference Result 212 states and 267 transitions. [2020-07-19 23:40:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:40:54,132 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-07-19 23:40:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:54,136 INFO L225 Difference]: With dead ends: 212 [2020-07-19 23:40:54,136 INFO L226 Difference]: Without dead ends: 210 [2020-07-19 23:40:54,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:40:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-19 23:40:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 146. [2020-07-19 23:40:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-19 23:40:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 187 transitions. [2020-07-19 23:40:54,150 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 187 transitions. Word has length 45 [2020-07-19 23:40:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:54,151 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 187 transitions. [2020-07-19 23:40:54,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 23:40:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 187 transitions. [2020-07-19 23:40:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-19 23:40:54,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:54,152 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:40:54,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-19 23:40:54,369 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:54,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-07-19 23:40:54,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:54,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661363484] [2020-07-19 23:40:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573d7f12 [2020-07-19 23:40:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:40:54,397 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:40:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:40:54,424 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:40:54,456 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:40:54,457 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:40:54,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-19 23:40:54,492 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-19 23:40:54,497 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-19 23:40:54,498 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-19 23:40:54,499 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-19 23:40:54,500 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-19 23:40:54,501 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-19 23:40:54,501 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-19 23:40:54,502 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-19 23:40:54,502 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-19 23:40:54,503 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-19 23:40:54,503 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-19 23:40:54,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:40:54 BoogieIcfgContainer [2020-07-19 23:40:54,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:40:54,522 INFO L168 Benchmark]: Toolchain (without parser) took 8931.06 ms. Allocated memory was 139.5 MB in the beginning and 290.5 MB in the end (delta: 151.0 MB). Free memory was 100.1 MB in the beginning and 181.5 MB in the end (delta: -81.4 MB). Peak memory consumption was 69.6 MB. Max. memory is 7.1 GB. [2020-07-19 23:40:54,523 INFO L168 Benchmark]: CDTParser took 0.82 ms. Allocated memory is still 139.5 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-19 23:40:54,524 INFO L168 Benchmark]: CACSL2BoogieTranslator took 466.82 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 99.7 MB in the beginning and 179.7 MB in the end (delta: -80.1 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-07-19 23:40:54,525 INFO L168 Benchmark]: Boogie Preprocessor took 70.18 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 177.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-19 23:40:54,526 INFO L168 Benchmark]: RCFGBuilder took 648.53 ms. Allocated memory is still 202.9 MB. Free memory was 177.1 MB in the beginning and 149.2 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:40:54,527 INFO L168 Benchmark]: TraceAbstraction took 7737.35 ms. Allocated memory was 202.9 MB in the beginning and 290.5 MB in the end (delta: 87.6 MB). Free memory was 149.2 MB in the beginning and 181.5 MB in the end (delta: -32.3 MB). Peak memory consumption was 55.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:40:54,534 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.82 ms. Allocated memory is still 139.5 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 466.82 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 99.7 MB in the beginning and 179.7 MB in the end (delta: -80.1 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.18 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 177.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 648.53 ms. Allocated memory is still 202.9 MB. Free memory was 177.1 MB in the beginning and 149.2 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7737.35 ms. Allocated memory was 202.9 MB in the beginning and 290.5 MB in the end (delta: 87.6 MB). Free memory was 149.2 MB in the beginning and 181.5 MB in the end (delta: -32.3 MB). Peak memory consumption was 55.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 VAL [A={4:0}] [L76] CALL parse_expression_list (A) VAL [str={4:0}] [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; VAL [i=-1, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}] [L50] COND FALSE !(!str) VAL [i=-1, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}] [L52] i++ [L53] str[i] [L54] case 0: VAL [i=0, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=-1] [L69] EXPR str[i] VAL [i=0, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=-1] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: VAL [i=1, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=-2] [L69] EXPR str[i] VAL [i=1, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=-2] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: VAL [i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0] [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[start]=-1, str[start]=-1] [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] VAL [i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[start]=-1] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 VAL [i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0] [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[j]=-2, str[j]=-2] [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=0, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[j]=-2, str[j]=-2] [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') VAL [(0 < j) && (str[j] == '"')=0, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[j]=-2] [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j VAL [i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0] [L61] CALL r_strncpy(str2, str+start, j-start+1) VAL [\old(n)=2, dest={3:0}, src={4:0}] [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) VAL [i=2, j=1, r_strncpy(str2, str+start, j-start+1)={35:37}, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0] [L62] CALL __VERIFIER_assert(j - start + 1 < 2) VAL [\old(cond)=0] [L3] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.5s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 532 SDtfs, 954 SDslu, 1451 SDs, 0 SdLazy, 2054 SolverSat, 255 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 219 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 574 NumberOfCodeBlocks, 564 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 515 ConstructedInterpolants, 0 QuantifiedInterpolants, 68435 SizeOfPredicates, 8 NumberOfNonLiveVariables, 470 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 2/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...