./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/realloc1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-ext3/realloc1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:17:01,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:17:01,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:17:01,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:17:01,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:17:01,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:17:01,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:17:01,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:17:01,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:17:01,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:17:01,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:17:01,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:17:01,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:17:01,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:17:01,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:17:01,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:17:01,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:17:01,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:17:01,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:17:01,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:17:01,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:17:01,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:17:01,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:17:01,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:17:01,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:17:01,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:17:01,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:17:01,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:17:01,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:17:01,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:17:01,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:17:01,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:17:01,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:17:01,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:17:01,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:17:01,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:17:01,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:17:01,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:17:01,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:17:01,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:17:01,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:17:01,621 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 06:17:01,666 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:17:01,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:17:01,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:17:01,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:17:01,674 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:17:01,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:17:01,675 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:17:01,675 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:17:01,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:17:01,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:17:01,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:17:01,676 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:17:01,676 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:17:01,676 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 06:17:01,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:17:01,677 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:17:01,677 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:17:01,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:17:01,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:17:01,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:17:01,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:17:01,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:17:01,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:17:01,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:17:01,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:17:01,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:17:01,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:17:01,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:17:01,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 [2020-10-20 06:17:01,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:17:01,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:17:01,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:17:01,973 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:17:01,974 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:17:01,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/realloc1.c [2020-10-20 06:17:02,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b0b5dfa3/7b64dac1e7cc4bf1bcec3c930b36b4cb/FLAG327ab7b5b [2020-10-20 06:17:02,494 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:17:02,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/realloc1.c [2020-10-20 06:17:02,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b0b5dfa3/7b64dac1e7cc4bf1bcec3c930b36b4cb/FLAG327ab7b5b [2020-10-20 06:17:02,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b0b5dfa3/7b64dac1e7cc4bf1bcec3c930b36b4cb [2020-10-20 06:17:02,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:17:02,905 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:17:02,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:17:02,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:17:02,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:17:02,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:17:02" (1/1) ... [2020-10-20 06:17:02,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ea9d28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:02, skipping insertion in model container [2020-10-20 06:17:02,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:17:02" (1/1) ... [2020-10-20 06:17:02,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:17:02,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:17:03,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:17:03,219 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:17:03,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:17:03,268 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:17:03,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:03 WrapperNode [2020-10-20 06:17:03,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:17:03,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:17:03,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:17:03,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:17:03,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:03" (1/1) ... [2020-10-20 06:17:03,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:03" (1/1) ... [2020-10-20 06:17:03,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:03" (1/1) ... [2020-10-20 06:17:03,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:03" (1/1) ... [2020-10-20 06:17:03,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:03" (1/1) ... [2020-10-20 06:17:03,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:03" (1/1) ... [2020-10-20 06:17:03,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:03" (1/1) ... [2020-10-20 06:17:03,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:17:03,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:17:03,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:17:03,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:17:03,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:03" (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 [2020-10-20 06:17:03,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:17:03,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:17:03,440 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:17:03,440 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_realloc [2020-10-20 06:17:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-20 06:17:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-20 06:17:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-20 06:17:03,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-20 06:17:03,442 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:17:03,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 06:17:03,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_realloc [2020-10-20 06:17:03,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 06:17:03,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:17:03,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 06:17:03,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:17:03,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:17:03,731 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:17:03,732 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-20 06:17:03,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:17:03 BoogieIcfgContainer [2020-10-20 06:17:03,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:17:03,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:17:03,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:17:03,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:17:03,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:17:02" (1/3) ... [2020-10-20 06:17:03,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a553ca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:17:03, skipping insertion in model container [2020-10-20 06:17:03,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:03" (2/3) ... [2020-10-20 06:17:03,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a553ca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:17:03, skipping insertion in model container [2020-10-20 06:17:03,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:17:03" (3/3) ... [2020-10-20 06:17:03,746 INFO L111 eAbstractionObserver]: Analyzing ICFG realloc1.c [2020-10-20 06:17:03,774 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:17:03,790 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-10-20 06:17:03,823 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-10-20 06:17:03,852 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:17:03,853 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:17:03,853 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:17:03,854 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:17:03,854 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:17:03,854 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:17:03,855 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:17:03,855 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:17:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-20 06:17:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 06:17:03,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:03,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:03,889 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:03,897 INFO L82 PathProgramCache]: Analyzing trace with hash 604141221, now seen corresponding path program 1 times [2020-10-20 06:17:03,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:03,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631620537] [2020-10-20 06:17:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:04,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:04,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631620537] [2020-10-20 06:17:04,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:17:04,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:17:04,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963370274] [2020-10-20 06:17:04,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:17:04,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:04,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:17:04,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:04,176 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-10-20 06:17:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:04,293 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-20 06:17:04,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:17:04,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-20 06:17:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:04,305 INFO L225 Difference]: With dead ends: 39 [2020-10-20 06:17:04,305 INFO L226 Difference]: Without dead ends: 36 [2020-10-20 06:17:04,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-20 06:17:04,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-20 06:17:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 06:17:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-20 06:17:04,353 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 8 [2020-10-20 06:17:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:04,353 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-20 06:17:04,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:17:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-20 06:17:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 06:17:04,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:04,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:04,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:17:04,355 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:04,355 INFO L82 PathProgramCache]: Analyzing trace with hash 604141275, now seen corresponding path program 1 times [2020-10-20 06:17:04,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:04,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056006318] [2020-10-20 06:17:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:04,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:04,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056006318] [2020-10-20 06:17:04,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:17:04,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:17:04,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957505705] [2020-10-20 06:17:04,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:17:04,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:04,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:17:04,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:04,413 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-10-20 06:17:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:04,515 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-10-20 06:17:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:17:04,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-20 06:17:04,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:04,517 INFO L225 Difference]: With dead ends: 32 [2020-10-20 06:17:04,517 INFO L226 Difference]: Without dead ends: 32 [2020-10-20 06:17:04,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:04,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-20 06:17:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-20 06:17:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 06:17:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-20 06:17:04,525 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 8 [2020-10-20 06:17:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:04,525 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-20 06:17:04,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:17:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-20 06:17:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 06:17:04,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:04,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:04,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:17:04,528 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:04,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:04,528 INFO L82 PathProgramCache]: Analyzing trace with hash 604141276, now seen corresponding path program 1 times [2020-10-20 06:17:04,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:04,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28505187] [2020-10-20 06:17:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:04,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:04,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28505187] [2020-10-20 06:17:04,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:17:04,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:17:04,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924836235] [2020-10-20 06:17:04,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:17:04,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:04,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:17:04,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:04,609 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-10-20 06:17:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:04,681 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-20 06:17:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:17:04,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-20 06:17:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:04,683 INFO L225 Difference]: With dead ends: 32 [2020-10-20 06:17:04,683 INFO L226 Difference]: Without dead ends: 32 [2020-10-20 06:17:04,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-20 06:17:04,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-20 06:17:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 06:17:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-20 06:17:04,689 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 8 [2020-10-20 06:17:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:04,690 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-20 06:17:04,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:17:04,690 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-20 06:17:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 06:17:04,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:04,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:04,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 06:17:04,692 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:04,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:04,693 INFO L82 PathProgramCache]: Analyzing trace with hash -572402136, now seen corresponding path program 1 times [2020-10-20 06:17:04,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:04,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708541531] [2020-10-20 06:17:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:04,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 06:17:04,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708541531] [2020-10-20 06:17:04,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:17:04,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:17:04,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656778693] [2020-10-20 06:17:04,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:17:04,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:04,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:17:04,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:04,746 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 4 states. [2020-10-20 06:17:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:04,814 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-10-20 06:17:04,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:17:04,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-20 06:17:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:04,816 INFO L225 Difference]: With dead ends: 32 [2020-10-20 06:17:04,816 INFO L226 Difference]: Without dead ends: 32 [2020-10-20 06:17:04,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-20 06:17:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-20 06:17:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 06:17:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-20 06:17:04,828 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 12 [2020-10-20 06:17:04,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:04,829 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-20 06:17:04,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:17:04,829 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-20 06:17:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 06:17:04,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:04,831 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:04,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:17:04,833 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:04,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:04,833 INFO L82 PathProgramCache]: Analyzing trace with hash -572402081, now seen corresponding path program 1 times [2020-10-20 06:17:04,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:04,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579000654] [2020-10-20 06:17:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:04,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:04,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579000654] [2020-10-20 06:17:04,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476326316] [2020-10-20 06:17:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 06:17:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:05,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 06:17:05,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:05,095 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:17:05,095 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:17:05,113 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:17:05,113 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:17:05,113 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-20 06:17:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:05,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:05,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2020-10-20 06:17:05,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889531926] [2020-10-20 06:17:05,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 06:17:05,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:05,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 06:17:05,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-20 06:17:05,151 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-10-20 06:17:05,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:05,277 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-20 06:17:05,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 06:17:05,278 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-20 06:17:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:05,280 INFO L225 Difference]: With dead ends: 37 [2020-10-20 06:17:05,280 INFO L226 Difference]: Without dead ends: 37 [2020-10-20 06:17:05,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-20 06:17:05,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-20 06:17:05,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-20 06:17:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-20 06:17:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-20 06:17:05,289 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 12 [2020-10-20 06:17:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:05,290 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-20 06:17:05,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 06:17:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-20 06:17:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:17:05,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:05,292 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:05,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:05,493 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:05,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1487393457, now seen corresponding path program 1 times [2020-10-20 06:17:05,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:05,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477586862] [2020-10-20 06:17:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:05,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:05,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477586862] [2020-10-20 06:17:05,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886439706] [2020-10-20 06:17:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 06:17:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:05,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 06:17:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:05,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:05,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-20 06:17:05,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238035876] [2020-10-20 06:17:05,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 06:17:05,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:05,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 06:17:05,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:17:05,764 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 8 states. [2020-10-20 06:17:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:05,843 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-20 06:17:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 06:17:05,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-20 06:17:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:05,845 INFO L225 Difference]: With dead ends: 41 [2020-10-20 06:17:05,845 INFO L226 Difference]: Without dead ends: 41 [2020-10-20 06:17:05,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:17:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-20 06:17:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-20 06:17:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-20 06:17:05,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-20 06:17:05,857 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2020-10-20 06:17:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:05,858 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-20 06:17:05,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 06:17:05,858 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-20 06:17:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:17:05,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:05,859 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:06,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:06,072 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:06,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:06,073 INFO L82 PathProgramCache]: Analyzing trace with hash 304700076, now seen corresponding path program 2 times [2020-10-20 06:17:06,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:06,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106277330] [2020-10-20 06:17:06,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:06,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:06,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106277330] [2020-10-20 06:17:06,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128693447] [2020-10-20 06:17:06,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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) [2020-10-20 06:17:06,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-20 06:17:06,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:06,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 06:17:06,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-20 06:17:06,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 06:17:06,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2020-10-20 06:17:06,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665848116] [2020-10-20 06:17:06,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:17:06,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:06,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:17:06,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:17:06,234 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 3 states. [2020-10-20 06:17:06,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:06,251 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-20 06:17:06,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:17:06,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-20 06:17:06,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:06,252 INFO L225 Difference]: With dead ends: 40 [2020-10-20 06:17:06,252 INFO L226 Difference]: Without dead ends: 40 [2020-10-20 06:17:06,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:17:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-20 06:17:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-20 06:17:06,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-20 06:17:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-20 06:17:06,257 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 25 [2020-10-20 06:17:06,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:06,257 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-20 06:17:06,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:17:06,257 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-20 06:17:06,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 06:17:06,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:06,258 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:06,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:06,470 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:06,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:06,471 INFO L82 PathProgramCache]: Analyzing trace with hash 758998927, now seen corresponding path program 1 times [2020-10-20 06:17:06,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:06,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215214095] [2020-10-20 06:17:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:06,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:06,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215214095] [2020-10-20 06:17:06,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308672369] [2020-10-20 06:17:06,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:06,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 06:17:06,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:06,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:06,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-20 06:17:06,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155791763] [2020-10-20 06:17:06,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 06:17:06,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:06,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 06:17:06,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:17:06,681 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 9 states. [2020-10-20 06:17:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:06,742 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-20 06:17:06,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 06:17:06,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-20 06:17:06,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:06,743 INFO L225 Difference]: With dead ends: 44 [2020-10-20 06:17:06,743 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 06:17:06,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:17:06,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 06:17:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-20 06:17:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 06:17:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-20 06:17:06,749 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 27 [2020-10-20 06:17:06,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:06,749 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-20 06:17:06,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 06:17:06,750 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-20 06:17:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 06:17:06,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:06,751 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:06,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:06,962 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:06,963 INFO L82 PathProgramCache]: Analyzing trace with hash 660364076, now seen corresponding path program 2 times [2020-10-20 06:17:06,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:06,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361150277] [2020-10-20 06:17:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:07,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:07,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361150277] [2020-10-20 06:17:07,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972724583] [2020-10-20 06:17:07,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:07,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 06:17:07,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:17:07,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 06:17:07,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:07,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:07,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-20 06:17:07,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875116036] [2020-10-20 06:17:07,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 06:17:07,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:07,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 06:17:07,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-20 06:17:07,133 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2020-10-20 06:17:07,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:07,219 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-20 06:17:07,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 06:17:07,220 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-20 06:17:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:07,221 INFO L225 Difference]: With dead ends: 48 [2020-10-20 06:17:07,221 INFO L226 Difference]: Without dead ends: 48 [2020-10-20 06:17:07,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-20 06:17:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-20 06:17:07,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-10-20 06:17:07,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 06:17:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-20 06:17:07,226 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 31 [2020-10-20 06:17:07,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:07,227 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-20 06:17:07,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 06:17:07,227 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-20 06:17:07,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 06:17:07,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:07,229 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:07,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:07,440 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:07,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1265514569, now seen corresponding path program 3 times [2020-10-20 06:17:07,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:07,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398686416] [2020-10-20 06:17:07,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:07,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:07,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398686416] [2020-10-20 06:17:07,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68837952] [2020-10-20 06:17:07,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:07,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-20 06:17:07,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:17:07,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 06:17:07,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:07,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:07,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-20 06:17:07,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120460776] [2020-10-20 06:17:07,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 06:17:07,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:07,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 06:17:07,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-20 06:17:07,632 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 11 states. [2020-10-20 06:17:07,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:07,727 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-20 06:17:07,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 06:17:07,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-20 06:17:07,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:07,729 INFO L225 Difference]: With dead ends: 52 [2020-10-20 06:17:07,729 INFO L226 Difference]: Without dead ends: 52 [2020-10-20 06:17:07,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-20 06:17:07,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-20 06:17:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-20 06:17:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-20 06:17:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-20 06:17:07,734 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 35 [2020-10-20 06:17:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:07,734 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-20 06:17:07,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 06:17:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-20 06:17:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-20 06:17:07,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:07,735 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:07,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:07,947 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:07,948 INFO L82 PathProgramCache]: Analyzing trace with hash 719470310, now seen corresponding path program 4 times [2020-10-20 06:17:07,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:07,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625194127] [2020-10-20 06:17:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:08,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:08,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625194127] [2020-10-20 06:17:08,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70689487] [2020-10-20 06:17:08,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:08,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 06:17:08,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:17:08,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 06:17:08,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:08,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:08,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-10-20 06:17:08,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531267696] [2020-10-20 06:17:08,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 06:17:08,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:08,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 06:17:08,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-20 06:17:08,165 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 12 states. [2020-10-20 06:17:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:08,243 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-20 06:17:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 06:17:08,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-20 06:17:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:08,245 INFO L225 Difference]: With dead ends: 56 [2020-10-20 06:17:08,245 INFO L226 Difference]: Without dead ends: 56 [2020-10-20 06:17:08,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-20 06:17:08,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-20 06:17:08,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-20 06:17:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-20 06:17:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-20 06:17:08,249 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 39 [2020-10-20 06:17:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:08,250 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-20 06:17:08,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 06:17:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-20 06:17:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-20 06:17:08,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:08,251 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:08,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:08,460 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:08,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:08,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1920487677, now seen corresponding path program 5 times [2020-10-20 06:17:08,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:08,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831258734] [2020-10-20 06:17:08,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:08,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:08,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831258734] [2020-10-20 06:17:08,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132630628] [2020-10-20 06:17:08,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:08,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-20 06:17:08,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:17:08,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 06:17:08,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:08,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:08,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-20 06:17:08,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138803887] [2020-10-20 06:17:08,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 06:17:08,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:08,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 06:17:08,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-20 06:17:08,685 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 13 states. [2020-10-20 06:17:08,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:08,796 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-20 06:17:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 06:17:08,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-20 06:17:08,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:08,798 INFO L225 Difference]: With dead ends: 60 [2020-10-20 06:17:08,798 INFO L226 Difference]: Without dead ends: 60 [2020-10-20 06:17:08,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-20 06:17:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-20 06:17:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-20 06:17:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 06:17:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-20 06:17:08,805 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 43 [2020-10-20 06:17:08,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:08,806 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-20 06:17:08,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 06:17:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-20 06:17:08,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-20 06:17:08,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:08,808 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:09,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-20 06:17:09,011 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:09,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1099810976, now seen corresponding path program 6 times [2020-10-20 06:17:09,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:09,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623623317] [2020-10-20 06:17:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:09,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:09,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623623317] [2020-10-20 06:17:09,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5369225] [2020-10-20 06:17:09,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:09,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-20 06:17:09,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:17:09,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 06:17:09,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:09,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:09,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-10-20 06:17:09,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016415557] [2020-10-20 06:17:09,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 06:17:09,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:09,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 06:17:09,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-20 06:17:09,280 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 14 states. [2020-10-20 06:17:09,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:09,378 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-20 06:17:09,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 06:17:09,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-20 06:17:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:09,379 INFO L225 Difference]: With dead ends: 61 [2020-10-20 06:17:09,380 INFO L226 Difference]: Without dead ends: 61 [2020-10-20 06:17:09,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-20 06:17:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-20 06:17:09,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-20 06:17:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-20 06:17:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-20 06:17:09,390 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 47 [2020-10-20 06:17:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:09,390 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-20 06:17:09,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 06:17:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-20 06:17:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-20 06:17:09,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:09,392 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:09,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:09,602 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-20 06:17:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:09,603 INFO L82 PathProgramCache]: Analyzing trace with hash -343684163, now seen corresponding path program 7 times [2020-10-20 06:17:09,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:09,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109676307] [2020-10-20 06:17:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:17:09,632 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:17:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:17:09,664 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:17:09,697 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:17:09,697 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 06:17:09,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-20 06:17:09,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:17:09 BoogieIcfgContainer [2020-10-20 06:17:09,769 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:17:09,770 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:17:09,770 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:17:09,773 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:17:09,774 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:17:03" (3/4) ... [2020-10-20 06:17:09,777 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 06:17:09,859 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:17:09,860 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:17:09,862 INFO L168 Benchmark]: Toolchain (without parser) took 6961.87 ms. Allocated memory was 37.2 MB in the beginning and 66.1 MB in the end (delta: 28.8 MB). Free memory was 19.0 MB in the beginning and 16.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 31.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:09,865 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 34.6 MB. Free memory was 11.3 MB in the beginning and 11.3 MB in the end (delta: 68.3 kB). Peak memory consumption was 68.3 kB. Max. memory is 14.3 GB. [2020-10-20 06:17:09,868 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.94 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 18.1 MB in the beginning and 27.4 MB in the end (delta: -9.3 MB). Peak memory consumption was 8.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:09,869 INFO L168 Benchmark]: Boogie Preprocessor took 83.10 ms. Allocated memory is still 45.1 MB. Free memory was 27.4 MB in the beginning and 25.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:09,870 INFO L168 Benchmark]: RCFGBuilder took 379.88 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 25.4 MB in the beginning and 21.6 MB in the end (delta: 3.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:09,870 INFO L168 Benchmark]: TraceAbstraction took 6033.68 ms. Allocated memory was 46.1 MB in the beginning and 66.1 MB in the end (delta: 19.9 MB). Free memory was 21.2 MB in the beginning and 19.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:09,871 INFO L168 Benchmark]: Witness Printer took 89.82 ms. Allocated memory is still 66.1 MB. Free memory was 19.2 MB in the beginning and 16.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:09,873 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 34.6 MB. Free memory was 11.3 MB in the beginning and 11.3 MB in the end (delta: 68.3 kB). Peak memory consumption was 68.3 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 361.94 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 18.1 MB in the beginning and 27.4 MB in the end (delta: -9.3 MB). Peak memory consumption was 8.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 83.10 ms. Allocated memory is still 45.1 MB. Free memory was 27.4 MB in the beginning and 25.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * RCFGBuilder took 379.88 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 25.4 MB in the beginning and 21.6 MB in the end (delta: 3.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 6033.68 ms. Allocated memory was 46.1 MB in the beginning and 66.1 MB in the end (delta: 19.9 MB). Free memory was 21.2 MB in the beginning and 19.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.3 GB. * Witness Printer took 89.82 ms. Allocated memory is still 66.1 MB. Free memory was 19.2 MB in the beginning and 16.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; VAL [i=0, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-1, i=0, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=1, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-2, i=1, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=2, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-3, i=2, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=3, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-4, i=3, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=4, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-5, i=4, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=5, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-6, i=5, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=6, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-7, i=6, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=7, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-8, i=7, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=8, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-9, i=8, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=9, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=10, i=9, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=10, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND FALSE !(i < 10) VAL [i=10, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L14] free(p) VAL [i=10, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L14] free(p) VAL [i=10, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L14] free(p) [L16] p[2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 33 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.8s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 211 SDslu, 716 SDs, 0 SdLazy, 726 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 37 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 647 NumberOfCodeBlocks, 631 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 574 ConstructedInterpolants, 0 QuantifiedInterpolants, 51270 SizeOfPredicates, 10 NumberOfNonLiveVariables, 905 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 29/1097 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...