/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/fibonacci.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 15:41:56,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 15:41:56,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 15:41:56,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 15:41:56,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-07 15:41:56,565 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 15:41:56,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 15:41:56,566 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 15:41:56,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 15:41:56,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 15:41:56,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 15:41:56,571 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 15:41:56,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 15:41:56,571 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 15:41:56,571 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 15:41:56,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 15:41:56,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 15:41:56,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 15:41:56,572 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-07 15:41:56,572 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-07 15:41:56,573 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-07 15:41:56,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 15:41:56,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-07 15:41:56,575 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-07 15:41:56,575 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-07 15:41:56,576 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 15:41:56,576 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 15:41:56,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 15:41:56,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 15:41:56,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 15:41:56,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:41:56,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 15:41:56,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 15:41:56,577 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-07 15:41:56,578 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-07 15:41:56,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 15:41:56,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-07 15:41:56,579 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 15:41:56,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 15:41:57,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 15:41:57,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 15:41:57,031 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 15:41:57,032 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 15:41:57,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/fibonacci.wvr.c [2021-10-07 15:41:57,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9615875b/3731fc3d4e414e73aaa7977f1749ebb0/FLAG8f5850d60 [2021-10-07 15:41:57,791 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 15:41:57,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/fibonacci.wvr.c [2021-10-07 15:41:57,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9615875b/3731fc3d4e414e73aaa7977f1749ebb0/FLAG8f5850d60 [2021-10-07 15:41:58,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9615875b/3731fc3d4e414e73aaa7977f1749ebb0 [2021-10-07 15:41:58,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 15:41:58,177 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-07 15:41:58,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 15:41:58,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 15:41:58,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 15:41:58,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:41:58" (1/1) ... [2021-10-07 15:41:58,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7993e8c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58, skipping insertion in model container [2021-10-07 15:41:58,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:41:58" (1/1) ... [2021-10-07 15:41:58,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 15:41:58,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 15:41:58,498 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/fibonacci.wvr.c[2378,2391] [2021-10-07 15:41:58,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:41:58,518 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 15:41:58,544 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/fibonacci.wvr.c[2378,2391] [2021-10-07 15:41:58,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:41:58,565 INFO L208 MainTranslator]: Completed translation [2021-10-07 15:41:58,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58 WrapperNode [2021-10-07 15:41:58,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 15:41:58,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 15:41:58,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 15:41:58,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 15:41:58,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58" (1/1) ... [2021-10-07 15:41:58,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58" (1/1) ... [2021-10-07 15:41:58,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 15:41:58,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 15:41:58,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 15:41:58,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 15:41:58,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58" (1/1) ... [2021-10-07 15:41:58,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58" (1/1) ... [2021-10-07 15:41:58,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58" (1/1) ... [2021-10-07 15:41:58,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58" (1/1) ... [2021-10-07 15:41:58,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58" (1/1) ... [2021-10-07 15:41:58,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58" (1/1) ... [2021-10-07 15:41:58,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58" (1/1) ... [2021-10-07 15:41:58,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 15:41:58,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 15:41:58,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 15:41:58,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 15:41:58,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58" (1/1) ... [2021-10-07 15:41:58,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:41:58,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:41:58,746 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 15:41:58,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 15:41:58,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 15:41:58,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 15:41:58,842 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 15:41:58,842 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 15:41:58,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-07 15:41:58,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 15:41:58,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 15:41:58,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 15:41:58,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-07 15:41:58,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 15:41:58,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 15:41:58,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 15:41:58,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-07 15:41:58,845 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 15:41:59,253 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 15:41:59,253 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-07 15:41:59,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:41:59 BoogieIcfgContainer [2021-10-07 15:41:59,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 15:41:59,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 15:41:59,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 15:41:59,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 15:41:59,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:41:58" (1/3) ... [2021-10-07 15:41:59,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b756f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:41:59, skipping insertion in model container [2021-10-07 15:41:59,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:41:58" (2/3) ... [2021-10-07 15:41:59,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b756f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:41:59, skipping insertion in model container [2021-10-07 15:41:59,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:41:59" (3/3) ... [2021-10-07 15:41:59,268 INFO L111 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2021-10-07 15:41:59,275 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 15:41:59,276 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-07 15:41:59,276 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 15:41:59,318 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,319 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,319 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,320 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,320 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,320 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,321 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,321 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,321 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,322 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,322 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,322 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,323 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,323 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,323 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,323 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,324 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,324 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,324 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,325 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,325 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,325 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,325 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,326 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,326 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,326 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,326 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,327 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,327 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,328 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,328 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,328 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,329 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,329 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,330 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,330 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,330 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,331 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,331 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,331 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,331 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,331 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,332 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,332 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,332 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,332 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,333 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,333 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,333 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,334 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,334 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,334 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,335 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,335 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,335 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,335 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,345 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,345 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,346 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,346 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,346 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,351 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,352 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,354 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,354 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,354 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:41:59,368 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-07 15:41:59,433 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 15:41:59,440 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 15:41:59,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-10-07 15:41:59,460 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 15:41:59,473 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 117 transitions, 250 flow [2021-10-07 15:41:59,477 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 117 transitions, 250 flow [2021-10-07 15:41:59,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 116 places, 117 transitions, 250 flow [2021-10-07 15:41:59,580 INFO L129 PetriNetUnfolder]: 8/115 cut-off events. [2021-10-07 15:41:59,581 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-07 15:41:59,589 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 8/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2021-10-07 15:41:59,595 INFO L116 LiptonReduction]: Number of co-enabled transitions 1248 [2021-10-07 15:42:10,957 INFO L131 LiptonReduction]: Checked pairs total: 1224 [2021-10-07 15:42:10,958 INFO L133 LiptonReduction]: Total number of compositions: 118 [2021-10-07 15:42:10,970 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 27 transitions, 70 flow [2021-10-07 15:42:10,990 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 67 states, 57 states have (on average 2.7017543859649122) internal successors, (154), 66 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 57 states have (on average 2.7017543859649122) internal successors, (154), 66 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:11,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-07 15:42:11,003 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:11,003 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-07 15:42:11,004 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash 454, now seen corresponding path program 1 times [2021-10-07 15:42:11,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:11,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848077517] [2021-10-07 15:42:11,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:42:11,024 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:11,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:11,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:11,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-07 15:42:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:11,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-07 15:42:11,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:11,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:11,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:11,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848077517] [2021-10-07 15:42:11,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848077517] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:42:11,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:42:11,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-07 15:42:11,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191339251] [2021-10-07 15:42:11,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-07 15:42:11,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:11,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-07 15:42:11,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-07 15:42:11,137 INFO L87 Difference]: Start difference. First operand has 67 states, 57 states have (on average 2.7017543859649122) internal successors, (154), 66 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:11,165 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2021-10-07 15:42:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-07 15:42:11,168 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2021-10-07 15:42:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:11,185 INFO L225 Difference]: With dead ends: 64 [2021-10-07 15:42:11,185 INFO L226 Difference]: Without dead ends: 64 [2021-10-07 15:42:11,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-07 15:42:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-07 15:42:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-07 15:42:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 2.6491228070175437) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 151 transitions. [2021-10-07 15:42:11,247 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 151 transitions. Word has length 1 [2021-10-07 15:42:11,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:11,247 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 151 transitions. [2021-10-07 15:42:11,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 151 transitions. [2021-10-07 15:42:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 15:42:11,250 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:11,250 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 15:42:11,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:11,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:11,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash 448069, now seen corresponding path program 1 times [2021-10-07 15:42:11,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:11,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456633956] [2021-10-07 15:42:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:42:11,472 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:11,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:11,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:11,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-07 15:42:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:11,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 15:42:11,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:11,822 INFO L354 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2021-10-07 15:42:11,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 38 [2021-10-07 15:42:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:11,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:12,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:12,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456633956] [2021-10-07 15:42:12,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456633956] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:42:12,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:42:12,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:42:12,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281880353] [2021-10-07 15:42:12,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:42:12,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:42:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:42:12,010 INFO L87 Difference]: Start difference. First operand 64 states and 151 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:12,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:12,042 INFO L93 Difference]: Finished difference Result 58 states and 139 transitions. [2021-10-07 15:42:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:42:12,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 15:42:12,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:12,045 INFO L225 Difference]: With dead ends: 58 [2021-10-07 15:42:12,045 INFO L226 Difference]: Without dead ends: 58 [2021-10-07 15:42:12,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:42:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-07 15:42:12,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-07 15:42:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 2.6226415094339623) internal successors, (139), 57 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2021-10-07 15:42:12,055 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 3 [2021-10-07 15:42:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:12,056 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2021-10-07 15:42:12,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2021-10-07 15:42:12,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 15:42:12,057 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:12,057 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 15:42:12,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:12,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:12,270 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:12,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:12,272 INFO L82 PathProgramCache]: Analyzing trace with hash 448070, now seen corresponding path program 1 times [2021-10-07 15:42:12,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:12,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999383286] [2021-10-07 15:42:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:42:12,274 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:12,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:12,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:12,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-07 15:42:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:12,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 15:42:12,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:12,353 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-07 15:42:12,354 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-07 15:42:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:12,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:12,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:12,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999383286] [2021-10-07 15:42:12,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999383286] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:42:12,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:42:12,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 15:42:12,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641050176] [2021-10-07 15:42:12,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:42:12,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:12,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:42:12,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:42:12,387 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:12,410 INFO L93 Difference]: Finished difference Result 52 states and 127 transitions. [2021-10-07 15:42:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:42:12,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 15:42:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:12,414 INFO L225 Difference]: With dead ends: 52 [2021-10-07 15:42:12,414 INFO L226 Difference]: Without dead ends: 52 [2021-10-07 15:42:12,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:42:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-07 15:42:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-07 15:42:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-10-07 15:42:12,433 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 3 [2021-10-07 15:42:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:12,433 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-10-07 15:42:12,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:12,434 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-10-07 15:42:12,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:42:12,434 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:12,435 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:42:12,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:12,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:12,636 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:12,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:12,638 INFO L82 PathProgramCache]: Analyzing trace with hash 430605995, now seen corresponding path program 1 times [2021-10-07 15:42:12,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:12,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80839790] [2021-10-07 15:42:12,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:42:12,639 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:12,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:12,641 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:12,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-07 15:42:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:12,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 15:42:12,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:12,816 INFO L354 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2021-10-07 15:42:12,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 38 [2021-10-07 15:42:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:12,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:13,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:13,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80839790] [2021-10-07 15:42:13,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80839790] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:42:13,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:42:13,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-07 15:42:13,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555576357] [2021-10-07 15:42:13,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:42:13,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:13,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:42:13,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:42:13,053 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:13,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:13,072 INFO L93 Difference]: Finished difference Result 43 states and 100 transitions. [2021-10-07 15:42:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:42:13,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:42:13,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:13,074 INFO L225 Difference]: With dead ends: 43 [2021-10-07 15:42:13,074 INFO L226 Difference]: Without dead ends: 43 [2021-10-07 15:42:13,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:42:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-07 15:42:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-07 15:42:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 42 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 100 transitions. [2021-10-07 15:42:13,080 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 100 transitions. Word has length 5 [2021-10-07 15:42:13,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:13,081 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 100 transitions. [2021-10-07 15:42:13,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:13,082 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 100 transitions. [2021-10-07 15:42:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:42:13,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:13,083 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:42:13,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:13,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:13,283 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:13,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:13,284 INFO L82 PathProgramCache]: Analyzing trace with hash 430605996, now seen corresponding path program 1 times [2021-10-07 15:42:13,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:13,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968937687] [2021-10-07 15:42:13,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:42:13,285 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:13,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:13,293 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:13,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-07 15:42:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:13,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-07 15:42:13,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:13,367 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-07 15:42:13,368 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-07 15:42:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:13,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:13,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:13,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968937687] [2021-10-07 15:42:13,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968937687] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:42:13,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:42:13,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-07 15:42:13,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588196453] [2021-10-07 15:42:13,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:42:13,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:13,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:42:13,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:42:13,411 INFO L87 Difference]: Start difference. First operand 43 states and 100 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:13,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:13,424 INFO L93 Difference]: Finished difference Result 34 states and 73 transitions. [2021-10-07 15:42:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:42:13,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:42:13,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:13,426 INFO L225 Difference]: With dead ends: 34 [2021-10-07 15:42:13,426 INFO L226 Difference]: Without dead ends: 34 [2021-10-07 15:42:13,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:42:13,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-07 15:42:13,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-07 15:42:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 73 transitions. [2021-10-07 15:42:13,431 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 73 transitions. Word has length 5 [2021-10-07 15:42:13,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:13,431 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 73 transitions. [2021-10-07 15:42:13,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 73 transitions. [2021-10-07 15:42:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:42:13,433 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:13,433 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:13,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:13,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:13,645 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:13,647 INFO L82 PathProgramCache]: Analyzing trace with hash -110960094, now seen corresponding path program 1 times [2021-10-07 15:42:13,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:13,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071890361] [2021-10-07 15:42:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:42:13,649 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:13,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:13,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:13,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-07 15:42:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:13,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:42:13,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:13,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:14,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:14,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071890361] [2021-10-07 15:42:14,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071890361] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:42:14,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:42:14,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-07 15:42:14,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120928703] [2021-10-07 15:42:14,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-07 15:42:14,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:14,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-07 15:42:14,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:42:14,215 INFO L87 Difference]: Start difference. First operand 34 states and 73 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:14,349 INFO L93 Difference]: Finished difference Result 67 states and 139 transitions. [2021-10-07 15:42:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:42:14,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 15:42:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:14,351 INFO L225 Difference]: With dead ends: 67 [2021-10-07 15:42:14,351 INFO L226 Difference]: Without dead ends: 62 [2021-10-07 15:42:14,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:42:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-07 15:42:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2021-10-07 15:42:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 118 transitions. [2021-10-07 15:42:14,359 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 118 transitions. Word has length 13 [2021-10-07 15:42:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:14,360 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 118 transitions. [2021-10-07 15:42:14,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 118 transitions. [2021-10-07 15:42:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:42:14,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:14,361 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:14,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:14,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:14,579 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash -620023868, now seen corresponding path program 2 times [2021-10-07 15:42:14,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:14,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151807706] [2021-10-07 15:42:14,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:42:14,581 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:14,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:14,585 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:14,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-07 15:42:14,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 15:42:14,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:14,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:42:14,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:14,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:15,138 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:15,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151807706] [2021-10-07 15:42:15,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151807706] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:42:15,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:42:15,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-07 15:42:15,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349817136] [2021-10-07 15:42:15,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-07 15:42:15,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:15,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-07 15:42:15,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:42:15,146 INFO L87 Difference]: Start difference. First operand 52 states and 118 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:15,295 INFO L93 Difference]: Finished difference Result 61 states and 130 transitions. [2021-10-07 15:42:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:42:15,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 15:42:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:15,298 INFO L225 Difference]: With dead ends: 61 [2021-10-07 15:42:15,299 INFO L226 Difference]: Without dead ends: 56 [2021-10-07 15:42:15,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:42:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-07 15:42:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-07 15:42:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2545454545454544) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 124 transitions. [2021-10-07 15:42:15,305 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 124 transitions. Word has length 13 [2021-10-07 15:42:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:15,305 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 124 transitions. [2021-10-07 15:42:15,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 124 transitions. [2021-10-07 15:42:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:42:15,307 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:15,307 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:15,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:15,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:15,519 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:15,520 INFO L82 PathProgramCache]: Analyzing trace with hash 855032313, now seen corresponding path program 1 times [2021-10-07 15:42:15,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:15,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391355622] [2021-10-07 15:42:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:42:15,522 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:15,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:15,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:15,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-07 15:42:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:15,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:42:15,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:15,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:15,732 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:15,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391355622] [2021-10-07 15:42:15,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391355622] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:42:15,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:42:15,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-07 15:42:15,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750107678] [2021-10-07 15:42:15,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-07 15:42:15,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-07 15:42:15,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:42:15,735 INFO L87 Difference]: Start difference. First operand 56 states and 124 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:15,867 INFO L93 Difference]: Finished difference Result 74 states and 157 transitions. [2021-10-07 15:42:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 15:42:15,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:42:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:15,869 INFO L225 Difference]: With dead ends: 74 [2021-10-07 15:42:15,870 INFO L226 Difference]: Without dead ends: 64 [2021-10-07 15:42:15,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:42:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-07 15:42:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2021-10-07 15:42:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 111 transitions. [2021-10-07 15:42:15,875 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 111 transitions. Word has length 14 [2021-10-07 15:42:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:15,876 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 111 transitions. [2021-10-07 15:42:15,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 111 transitions. [2021-10-07 15:42:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:42:15,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:15,877 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:15,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:16,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:16,090 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:16,091 INFO L82 PathProgramCache]: Analyzing trace with hash 404255940, now seen corresponding path program 1 times [2021-10-07 15:42:16,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:16,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016528755] [2021-10-07 15:42:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:42:16,093 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:16,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:16,094 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:16,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-07 15:42:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:16,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:42:16,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:16,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:16,409 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:16,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016528755] [2021-10-07 15:42:16,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016528755] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:16,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:16,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-07 15:42:16,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41747086] [2021-10-07 15:42:16,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:42:16,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:16,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:42:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:42:16,412 INFO L87 Difference]: Start difference. First operand 50 states and 111 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:16,702 INFO L93 Difference]: Finished difference Result 104 states and 228 transitions. [2021-10-07 15:42:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:42:16,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:42:16,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:16,707 INFO L225 Difference]: With dead ends: 104 [2021-10-07 15:42:16,707 INFO L226 Difference]: Without dead ends: 104 [2021-10-07 15:42:16,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:42:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-07 15:42:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 52. [2021-10-07 15:42:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 118 transitions. [2021-10-07 15:42:16,713 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 118 transitions. Word has length 14 [2021-10-07 15:42:16,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:16,714 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 118 transitions. [2021-10-07 15:42:16,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 118 transitions. [2021-10-07 15:42:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:42:16,715 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:16,715 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:16,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:16,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:16,920 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:16,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1436528091, now seen corresponding path program 2 times [2021-10-07 15:42:16,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:16,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879056514] [2021-10-07 15:42:16,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:42:16,922 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:16,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:16,924 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:16,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-07 15:42:17,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:42:17,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:17,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:42:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:17,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:17,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:17,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879056514] [2021-10-07 15:42:17,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879056514] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-07 15:42:17,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:42:17,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-10-07 15:42:17,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583473798] [2021-10-07 15:42:17,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 15:42:17,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 15:42:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:42:17,220 INFO L87 Difference]: Start difference. First operand 52 states and 118 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:17,284 INFO L93 Difference]: Finished difference Result 92 states and 200 transitions. [2021-10-07 15:42:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:42:17,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:42:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:17,287 INFO L225 Difference]: With dead ends: 92 [2021-10-07 15:42:17,288 INFO L226 Difference]: Without dead ends: 92 [2021-10-07 15:42:17,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:42:17,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-07 15:42:17,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2021-10-07 15:42:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 55 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 134 transitions. [2021-10-07 15:42:17,302 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 134 transitions. Word has length 14 [2021-10-07 15:42:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:17,302 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 134 transitions. [2021-10-07 15:42:17,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 134 transitions. [2021-10-07 15:42:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:42:17,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:17,305 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:17,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:17,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:17,506 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1437122737, now seen corresponding path program 3 times [2021-10-07 15:42:17,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:17,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287366831] [2021-10-07 15:42:17,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:42:17,508 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:17,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:17,510 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:17,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-07 15:42:17,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:42:17,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:17,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:42:17,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:17,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:17,790 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:17,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287366831] [2021-10-07 15:42:17,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287366831] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:42:17,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:42:17,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-07 15:42:17,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150429602] [2021-10-07 15:42:17,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:42:17,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:17,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:42:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:42:17,797 INFO L87 Difference]: Start difference. First operand 56 states and 134 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:18,051 INFO L93 Difference]: Finished difference Result 104 states and 214 transitions. [2021-10-07 15:42:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:42:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:42:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:18,055 INFO L225 Difference]: With dead ends: 104 [2021-10-07 15:42:18,056 INFO L226 Difference]: Without dead ends: 98 [2021-10-07 15:42:18,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:42:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-07 15:42:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2021-10-07 15:42:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.3934426229508197) internal successors, (146), 61 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 146 transitions. [2021-10-07 15:42:18,072 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 146 transitions. Word has length 14 [2021-10-07 15:42:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:18,073 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 146 transitions. [2021-10-07 15:42:18,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:18,073 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 146 transitions. [2021-10-07 15:42:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:42:18,079 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:18,079 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:18,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:18,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:18,280 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:18,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:18,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1579079200, now seen corresponding path program 2 times [2021-10-07 15:42:18,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:18,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979074329] [2021-10-07 15:42:18,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:42:18,283 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:18,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:18,284 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:18,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-07 15:42:18,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:42:18,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:18,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:42:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:18,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:18,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:18,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979074329] [2021-10-07 15:42:18,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979074329] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:18,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:18,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-07 15:42:18,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983704750] [2021-10-07 15:42:18,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:42:18,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:18,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:42:18,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:42:18,618 INFO L87 Difference]: Start difference. First operand 62 states and 146 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:18,907 INFO L93 Difference]: Finished difference Result 122 states and 268 transitions. [2021-10-07 15:42:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:42:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:42:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:18,910 INFO L225 Difference]: With dead ends: 122 [2021-10-07 15:42:18,910 INFO L226 Difference]: Without dead ends: 122 [2021-10-07 15:42:18,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:42:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-07 15:42:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 66. [2021-10-07 15:42:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4923076923076923) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2021-10-07 15:42:18,916 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 14 [2021-10-07 15:42:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:18,916 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2021-10-07 15:42:18,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:18,916 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2021-10-07 15:42:18,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:42:18,917 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:18,917 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:18,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:19,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:19,130 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:19,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:19,131 INFO L82 PathProgramCache]: Analyzing trace with hash -937583463, now seen corresponding path program 4 times [2021-10-07 15:42:19,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:19,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752716167] [2021-10-07 15:42:19,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:42:19,133 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:19,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:19,135 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:19,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-07 15:42:19,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:42:19,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:19,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:42:19,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:19,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:19,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:19,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752716167] [2021-10-07 15:42:19,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752716167] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:19,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:19,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-07 15:42:19,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346235864] [2021-10-07 15:42:19,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:42:19,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:19,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:42:19,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:42:19,434 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:19,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:19,709 INFO L93 Difference]: Finished difference Result 116 states and 272 transitions. [2021-10-07 15:42:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:42:19,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:42:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:19,711 INFO L225 Difference]: With dead ends: 116 [2021-10-07 15:42:19,711 INFO L226 Difference]: Without dead ends: 116 [2021-10-07 15:42:19,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:42:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-07 15:42:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 66. [2021-10-07 15:42:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5538461538461537) internal successors, (166), 65 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 166 transitions. [2021-10-07 15:42:19,717 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 166 transitions. Word has length 14 [2021-10-07 15:42:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:19,717 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 166 transitions. [2021-10-07 15:42:19,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 166 transitions. [2021-10-07 15:42:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:42:19,718 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:19,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:19,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:19,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:19,920 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:19,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1478649638, now seen corresponding path program 3 times [2021-10-07 15:42:19,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:19,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534434780] [2021-10-07 15:42:19,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:42:19,922 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:19,924 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:19,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-07 15:42:20,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:42:20,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:20,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:42:20,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:20,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:20,161 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:20,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534434780] [2021-10-07 15:42:20,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534434780] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:42:20,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:42:20,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-07 15:42:20,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790342696] [2021-10-07 15:42:20,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-07 15:42:20,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:20,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-07 15:42:20,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:42:20,163 INFO L87 Difference]: Start difference. First operand 66 states and 166 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:20,301 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2021-10-07 15:42:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 15:42:20,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:42:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:20,305 INFO L225 Difference]: With dead ends: 92 [2021-10-07 15:42:20,305 INFO L226 Difference]: Without dead ends: 88 [2021-10-07 15:42:20,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:42:20,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-07 15:42:20,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2021-10-07 15:42:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.523076923076923) internal successors, (164), 65 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 164 transitions. [2021-10-07 15:42:20,314 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 164 transitions. Word has length 14 [2021-10-07 15:42:20,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:20,314 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 164 transitions. [2021-10-07 15:42:20,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 164 transitions. [2021-10-07 15:42:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:42:20,317 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:20,317 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:20,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:20,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:20,530 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:20,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1500725793, now seen corresponding path program 5 times [2021-10-07 15:42:20,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:20,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157104520] [2021-10-07 15:42:20,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:42:20,532 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:20,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:20,534 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:20,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-07 15:42:20,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:42:20,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:20,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:42:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:20,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:20,793 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:20,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157104520] [2021-10-07 15:42:20,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157104520] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:42:20,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:42:20,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-07 15:42:20,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174469071] [2021-10-07 15:42:20,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:42:20,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:20,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:42:20,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:42:20,796 INFO L87 Difference]: Start difference. First operand 66 states and 164 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:20,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:20,996 INFO L93 Difference]: Finished difference Result 112 states and 257 transitions. [2021-10-07 15:42:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 15:42:20,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:42:20,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:20,999 INFO L225 Difference]: With dead ends: 112 [2021-10-07 15:42:20,999 INFO L226 Difference]: Without dead ends: 112 [2021-10-07 15:42:20,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:42:20,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-07 15:42:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 66. [2021-10-07 15:42:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.523076923076923) internal successors, (164), 65 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 164 transitions. [2021-10-07 15:42:21,003 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 164 transitions. Word has length 14 [2021-10-07 15:42:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:21,004 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 164 transitions. [2021-10-07 15:42:21,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 164 transitions. [2021-10-07 15:42:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:42:21,005 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:21,005 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:21,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-07 15:42:21,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:21,217 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:21,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:21,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1501320439, now seen corresponding path program 6 times [2021-10-07 15:42:21,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:21,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050107133] [2021-10-07 15:42:21,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:42:21,219 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:21,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:21,220 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:21,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-07 15:42:21,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 15:42:21,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:42:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:21,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:21,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:21,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050107133] [2021-10-07 15:42:21,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050107133] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-07 15:42:21,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:42:21,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-07 15:42:21,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479162131] [2021-10-07 15:42:21,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 15:42:21,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:21,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 15:42:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:42:21,451 INFO L87 Difference]: Start difference. First operand 66 states and 164 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:21,670 INFO L93 Difference]: Finished difference Result 110 states and 235 transitions. [2021-10-07 15:42:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:42:21,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:42:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:21,672 INFO L225 Difference]: With dead ends: 110 [2021-10-07 15:42:21,672 INFO L226 Difference]: Without dead ends: 104 [2021-10-07 15:42:21,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:42:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-07 15:42:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2021-10-07 15:42:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4615384615384617) internal successors, (160), 65 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 160 transitions. [2021-10-07 15:42:21,676 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 160 transitions. Word has length 14 [2021-10-07 15:42:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:21,677 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 160 transitions. [2021-10-07 15:42:21,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 160 transitions. [2021-10-07 15:42:21,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:42:21,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:21,678 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:21,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:21,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:21,886 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:21,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1643276902, now seen corresponding path program 4 times [2021-10-07 15:42:21,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:21,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318761176] [2021-10-07 15:42:21,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:42:21,888 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:21,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:21,889 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:21,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-07 15:42:22,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:42:22,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:22,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:42:22,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:22,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:22,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:22,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318761176] [2021-10-07 15:42:22,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318761176] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:22,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:22,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-07 15:42:22,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56987445] [2021-10-07 15:42:22,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:42:22,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:42:22,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:42:22,233 INFO L87 Difference]: Start difference. First operand 66 states and 160 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:22,521 INFO L93 Difference]: Finished difference Result 116 states and 266 transitions. [2021-10-07 15:42:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:42:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 15:42:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:22,523 INFO L225 Difference]: With dead ends: 116 [2021-10-07 15:42:22,524 INFO L226 Difference]: Without dead ends: 116 [2021-10-07 15:42:22,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:42:22,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-07 15:42:22,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 66. [2021-10-07 15:42:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4615384615384617) internal successors, (160), 65 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 160 transitions. [2021-10-07 15:42:22,532 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 160 transitions. Word has length 14 [2021-10-07 15:42:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:22,532 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 160 transitions. [2021-10-07 15:42:22,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:22,532 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 160 transitions. [2021-10-07 15:42:22,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:42:22,533 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:22,533 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:22,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:22,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:22,748 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:22,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:22,749 INFO L82 PathProgramCache]: Analyzing trace with hash -353139817, now seen corresponding path program 1 times [2021-10-07 15:42:22,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:22,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70958678] [2021-10-07 15:42:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:42:22,751 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:22,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:22,753 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:22,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-07 15:42:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:22,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:42:22,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:23,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:23,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:23,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70958678] [2021-10-07 15:42:23,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70958678] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:23,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:23,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-07 15:42:23,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328371814] [2021-10-07 15:42:23,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:42:23,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:23,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:42:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:42:23,848 INFO L87 Difference]: Start difference. First operand 66 states and 160 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:24,113 INFO L93 Difference]: Finished difference Result 91 states and 211 transitions. [2021-10-07 15:42:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:42:24,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 15:42:24,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:24,114 INFO L225 Difference]: With dead ends: 91 [2021-10-07 15:42:24,114 INFO L226 Difference]: Without dead ends: 86 [2021-10-07 15:42:24,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 346.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:42:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-07 15:42:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-10-07 15:42:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.419753086419753) internal successors, (196), 81 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 196 transitions. [2021-10-07 15:42:24,118 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 196 transitions. Word has length 15 [2021-10-07 15:42:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:24,119 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 196 transitions. [2021-10-07 15:42:24,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 196 transitions. [2021-10-07 15:42:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:42:24,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:24,120 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:24,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:24,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:24,330 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1650267075, now seen corresponding path program 2 times [2021-10-07 15:42:24,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:24,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208746398] [2021-10-07 15:42:24,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:42:24,332 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:24,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:24,333 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:24,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-07 15:42:24,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:42:24,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:24,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:42:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:24,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:25,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:25,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208746398] [2021-10-07 15:42:25,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208746398] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:25,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:25,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:42:25,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084008259] [2021-10-07 15:42:25,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:42:25,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:25,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:42:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:42:25,256 INFO L87 Difference]: Start difference. First operand 82 states and 196 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:25,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:25,501 INFO L93 Difference]: Finished difference Result 105 states and 237 transitions. [2021-10-07 15:42:25,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:42:25,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 15:42:25,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:25,503 INFO L225 Difference]: With dead ends: 105 [2021-10-07 15:42:25,503 INFO L226 Difference]: Without dead ends: 100 [2021-10-07 15:42:25,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:42:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-07 15:42:25,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2021-10-07 15:42:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.4698795180722892) internal successors, (205), 83 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 205 transitions. [2021-10-07 15:42:25,508 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 205 transitions. Word has length 15 [2021-10-07 15:42:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:25,508 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 205 transitions. [2021-10-07 15:42:25,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 205 transitions. [2021-10-07 15:42:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:42:25,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:25,509 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:25,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:25,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:25,722 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:25,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:25,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1854037515, now seen corresponding path program 3 times [2021-10-07 15:42:25,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:25,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810297761] [2021-10-07 15:42:25,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:42:25,725 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:25,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:25,726 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:25,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-07 15:42:25,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:42:25,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:25,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:42:25,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:26,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:26,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:26,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810297761] [2021-10-07 15:42:26,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810297761] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:26,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:26,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:42:26,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328293521] [2021-10-07 15:42:26,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:42:26,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:42:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:42:26,645 INFO L87 Difference]: Start difference. First operand 84 states and 205 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:26,926 INFO L93 Difference]: Finished difference Result 95 states and 221 transitions. [2021-10-07 15:42:26,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:42:26,926 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 15:42:26,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:26,927 INFO L225 Difference]: With dead ends: 95 [2021-10-07 15:42:26,927 INFO L226 Difference]: Without dead ends: 90 [2021-10-07 15:42:26,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:42:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-07 15:42:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-10-07 15:42:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.4698795180722892) internal successors, (205), 83 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 205 transitions. [2021-10-07 15:42:26,932 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 205 transitions. Word has length 15 [2021-10-07 15:42:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:26,932 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 205 transitions. [2021-10-07 15:42:26,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:26,933 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 205 transitions. [2021-10-07 15:42:26,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:42:26,933 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:26,934 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:26,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:27,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:27,135 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:27,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1043561116, now seen corresponding path program 7 times [2021-10-07 15:42:27,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:27,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974630540] [2021-10-07 15:42:27,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:42:27,137 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:27,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:27,139 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:27,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-07 15:42:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:27,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:42:27,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:27,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:27,532 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:27,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974630540] [2021-10-07 15:42:27,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974630540] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:27,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:27,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-07 15:42:27,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431912365] [2021-10-07 15:42:27,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:42:27,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:27,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:42:27,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:42:27,534 INFO L87 Difference]: Start difference. First operand 84 states and 205 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:27,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:27,956 INFO L93 Difference]: Finished difference Result 168 states and 364 transitions. [2021-10-07 15:42:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:42:27,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 15:42:27,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:27,959 INFO L225 Difference]: With dead ends: 168 [2021-10-07 15:42:27,959 INFO L226 Difference]: Without dead ends: 168 [2021-10-07 15:42:27,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:42:27,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-07 15:42:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 88. [2021-10-07 15:42:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.574712643678161) internal successors, (224), 87 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 224 transitions. [2021-10-07 15:42:27,966 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 224 transitions. Word has length 15 [2021-10-07 15:42:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:27,966 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 224 transitions. [2021-10-07 15:42:27,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 224 transitions. [2021-10-07 15:42:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:42:27,967 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:27,967 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:27,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-10-07 15:42:28,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:28,174 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:28,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:28,175 INFO L82 PathProgramCache]: Analyzing trace with hash 244121979, now seen corresponding path program 4 times [2021-10-07 15:42:28,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:28,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107522351] [2021-10-07 15:42:28,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:42:28,176 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:28,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:28,178 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:28,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-07 15:42:28,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:42:28,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:28,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:42:28,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:28,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:29,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:29,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107522351] [2021-10-07 15:42:29,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107522351] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:29,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:29,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-07 15:42:29,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422871185] [2021-10-07 15:42:29,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:42:29,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:42:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:42:29,099 INFO L87 Difference]: Start difference. First operand 88 states and 224 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:29,349 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2021-10-07 15:42:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:42:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 15:42:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:29,351 INFO L225 Difference]: With dead ends: 103 [2021-10-07 15:42:29,351 INFO L226 Difference]: Without dead ends: 98 [2021-10-07 15:42:29,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:42:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-07 15:42:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-10-07 15:42:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.5913978494623655) internal successors, (241), 93 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2021-10-07 15:42:29,355 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 15 [2021-10-07 15:42:29,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:29,355 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2021-10-07 15:42:29,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2021-10-07 15:42:29,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:42:29,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:29,356 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:29,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-10-07 15:42:29,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:29,557 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:29,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:29,558 INFO L82 PathProgramCache]: Analyzing trace with hash 901010007, now seen corresponding path program 5 times [2021-10-07 15:42:29,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:29,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367566461] [2021-10-07 15:42:29,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:42:29,559 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:29,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:29,560 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:29,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-07 15:42:29,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:42:29,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:29,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:42:29,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:30,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:30,491 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:30,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367566461] [2021-10-07 15:42:30,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367566461] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:30,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:30,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:42:30,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081053559] [2021-10-07 15:42:30,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:42:30,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:42:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:42:30,494 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:30,730 INFO L93 Difference]: Finished difference Result 117 states and 281 transitions. [2021-10-07 15:42:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:42:30,730 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 15:42:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:30,732 INFO L225 Difference]: With dead ends: 117 [2021-10-07 15:42:30,732 INFO L226 Difference]: Without dead ends: 112 [2021-10-07 15:42:30,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:42:30,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-07 15:42:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 96. [2021-10-07 15:42:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.6315789473684212) internal successors, (250), 95 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 250 transitions. [2021-10-07 15:42:30,737 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 250 transitions. Word has length 15 [2021-10-07 15:42:30,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:30,738 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 250 transitions. [2021-10-07 15:42:30,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 250 transitions. [2021-10-07 15:42:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:42:30,739 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:30,739 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:30,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:30,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:30,952 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:30,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:30,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1104780447, now seen corresponding path program 6 times [2021-10-07 15:42:30,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:30,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299554225] [2021-10-07 15:42:30,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:42:30,954 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:30,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:30,955 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:30,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-07 15:42:31,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 15:42:31,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:31,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:42:31,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:31,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:31,873 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:31,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299554225] [2021-10-07 15:42:31,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299554225] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:31,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:31,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-07 15:42:31,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124615002] [2021-10-07 15:42:31,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 15:42:31,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:31,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 15:42:31,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:42:31,876 INFO L87 Difference]: Start difference. First operand 96 states and 250 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:32,119 INFO L93 Difference]: Finished difference Result 111 states and 272 transitions. [2021-10-07 15:42:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 15:42:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 15:42:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:32,121 INFO L225 Difference]: With dead ends: 111 [2021-10-07 15:42:32,121 INFO L226 Difference]: Without dead ends: 106 [2021-10-07 15:42:32,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:42:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-07 15:42:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-10-07 15:42:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.5913978494623655) internal successors, (241), 93 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:32,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2021-10-07 15:42:32,127 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 15 [2021-10-07 15:42:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:32,127 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2021-10-07 15:42:32,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:32,128 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2021-10-07 15:42:32,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:32,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:32,129 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:32,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-10-07 15:42:32,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:32,341 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:32,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1937395492, now seen corresponding path program 7 times [2021-10-07 15:42:32,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:32,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164464760] [2021-10-07 15:42:32,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:42:32,344 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:32,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:32,345 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:32,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-07 15:42:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:32,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:42:32,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:32,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:32,790 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:32,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164464760] [2021-10-07 15:42:32,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164464760] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:32,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:32,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:42:32,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682750191] [2021-10-07 15:42:32,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:42:32,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:32,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:42:32,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:42:32,793 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:33,087 INFO L93 Difference]: Finished difference Result 124 states and 298 transitions. [2021-10-07 15:42:33,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:42:33,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:33,088 INFO L225 Difference]: With dead ends: 124 [2021-10-07 15:42:33,088 INFO L226 Difference]: Without dead ends: 110 [2021-10-07 15:42:33,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:42:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-07 15:42:33,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2021-10-07 15:42:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.6206896551724137) internal successors, (228), 87 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 228 transitions. [2021-10-07 15:42:33,092 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 228 transitions. Word has length 16 [2021-10-07 15:42:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:33,092 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 228 transitions. [2021-10-07 15:42:33,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:33,092 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 228 transitions. [2021-10-07 15:42:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:33,093 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:33,093 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:33,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:33,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:33,294 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:33,295 INFO L82 PathProgramCache]: Analyzing trace with hash 848229817, now seen corresponding path program 8 times [2021-10-07 15:42:33,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:33,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25104726] [2021-10-07 15:42:33,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:42:33,296 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:33,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:33,298 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:33,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-07 15:42:33,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:42:33,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:42:33,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:33,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:33,879 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:33,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25104726] [2021-10-07 15:42:33,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25104726] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:33,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:33,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-07 15:42:33,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683258813] [2021-10-07 15:42:33,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:42:33,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:33,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:42:33,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:42:33,882 INFO L87 Difference]: Start difference. First operand 88 states and 228 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:34,470 INFO L93 Difference]: Finished difference Result 188 states and 446 transitions. [2021-10-07 15:42:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:42:34,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:34,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:34,472 INFO L225 Difference]: With dead ends: 188 [2021-10-07 15:42:34,472 INFO L226 Difference]: Without dead ends: 188 [2021-10-07 15:42:34,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:42:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-10-07 15:42:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 90. [2021-10-07 15:42:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.640449438202247) internal successors, (235), 89 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 235 transitions. [2021-10-07 15:42:34,477 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 235 transitions. Word has length 16 [2021-10-07 15:42:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:34,477 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 235 transitions. [2021-10-07 15:42:34,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 235 transitions. [2021-10-07 15:42:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:34,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:34,478 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:34,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-07 15:42:34,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:34,691 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:34,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:34,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2050631192, now seen corresponding path program 9 times [2021-10-07 15:42:34,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:34,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774521316] [2021-10-07 15:42:34,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:42:34,694 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:34,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:34,696 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:34,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-07 15:42:34,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:42:34,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:34,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:42:34,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:35,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:35,226 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:35,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774521316] [2021-10-07 15:42:35,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774521316] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:35,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:35,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:42:35,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798443923] [2021-10-07 15:42:35,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:42:35,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:42:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:42:35,227 INFO L87 Difference]: Start difference. First operand 90 states and 235 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:35,880 INFO L93 Difference]: Finished difference Result 190 states and 439 transitions. [2021-10-07 15:42:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 15:42:35,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:35,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:35,883 INFO L225 Difference]: With dead ends: 190 [2021-10-07 15:42:35,883 INFO L226 Difference]: Without dead ends: 184 [2021-10-07 15:42:35,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 439.1ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:42:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-07 15:42:35,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 100. [2021-10-07 15:42:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.676767676767677) internal successors, (265), 99 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 265 transitions. [2021-10-07 15:42:35,889 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 265 transitions. Word has length 16 [2021-10-07 15:42:35,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:35,890 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 265 transitions. [2021-10-07 15:42:35,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 265 transitions. [2021-10-07 15:42:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:35,891 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:35,891 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:35,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:36,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:36,104 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:36,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2102379641, now seen corresponding path program 10 times [2021-10-07 15:42:36,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:36,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538768779] [2021-10-07 15:42:36,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:42:36,106 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:36,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:36,107 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:36,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-07 15:42:36,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:42:36,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:36,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:42:36,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:36,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:36,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:36,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538768779] [2021-10-07 15:42:36,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538768779] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:36,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:36,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-07 15:42:36,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309515464] [2021-10-07 15:42:36,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:42:36,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:36,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:42:36,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:42:36,771 INFO L87 Difference]: Start difference. First operand 100 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:37,877 INFO L93 Difference]: Finished difference Result 240 states and 565 transitions. [2021-10-07 15:42:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 15:42:37,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:37,880 INFO L225 Difference]: With dead ends: 240 [2021-10-07 15:42:37,880 INFO L226 Difference]: Without dead ends: 240 [2021-10-07 15:42:37,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 895.7ms TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:42:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-10-07 15:42:37,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 108. [2021-10-07 15:42:37,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.7757009345794392) internal successors, (297), 107 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 297 transitions. [2021-10-07 15:42:37,901 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 297 transitions. Word has length 16 [2021-10-07 15:42:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:37,901 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 297 transitions. [2021-10-07 15:42:37,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 297 transitions. [2021-10-07 15:42:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:37,902 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:37,902 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:37,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:38,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:38,116 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2069065218, now seen corresponding path program 11 times [2021-10-07 15:42:38,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:38,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355872299] [2021-10-07 15:42:38,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:42:38,118 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:38,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:38,119 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:38,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-07 15:42:38,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:42:38,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:38,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:42:38,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:38,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:38,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:38,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355872299] [2021-10-07 15:42:38,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355872299] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:38,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:38,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:42:38,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979426821] [2021-10-07 15:42:38,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:42:38,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:38,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:42:38,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:42:38,714 INFO L87 Difference]: Start difference. First operand 108 states and 297 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:39,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:39,104 INFO L93 Difference]: Finished difference Result 144 states and 368 transitions. [2021-10-07 15:42:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:42:39,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:39,106 INFO L225 Difference]: With dead ends: 144 [2021-10-07 15:42:39,106 INFO L226 Difference]: Without dead ends: 136 [2021-10-07 15:42:39,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:42:39,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-07 15:42:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 108. [2021-10-07 15:42:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.7570093457943927) internal successors, (295), 107 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 295 transitions. [2021-10-07 15:42:39,112 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 295 transitions. Word has length 16 [2021-10-07 15:42:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:39,112 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 295 transitions. [2021-10-07 15:42:39,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 295 transitions. [2021-10-07 15:42:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:39,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:39,113 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:39,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:39,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:39,317 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:39,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2120813667, now seen corresponding path program 12 times [2021-10-07 15:42:39,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:39,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783444250] [2021-10-07 15:42:39,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:42:39,319 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:39,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:39,320 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:39,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-07 15:42:39,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 15:42:39,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:42:39,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:39,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:40,014 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:40,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783444250] [2021-10-07 15:42:40,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783444250] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:40,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:40,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-07 15:42:40,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850358549] [2021-10-07 15:42:40,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:42:40,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:40,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:42:40,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:42:40,018 INFO L87 Difference]: Start difference. First operand 108 states and 295 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:41,571 INFO L93 Difference]: Finished difference Result 244 states and 577 transitions. [2021-10-07 15:42:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 15:42:41,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:41,574 INFO L225 Difference]: With dead ends: 244 [2021-10-07 15:42:41,574 INFO L226 Difference]: Without dead ends: 244 [2021-10-07 15:42:41,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1273.8ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:42:41,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-07 15:42:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 116. [2021-10-07 15:42:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.8086956521739133) internal successors, (323), 115 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 323 transitions. [2021-10-07 15:42:41,581 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 323 transitions. Word has length 16 [2021-10-07 15:42:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:41,581 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 323 transitions. [2021-10-07 15:42:41,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 323 transitions. [2021-10-07 15:42:41,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:41,583 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:41,583 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:41,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:41,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:41,796 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:41,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:41,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1217249747, now seen corresponding path program 13 times [2021-10-07 15:42:41,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:41,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315926069] [2021-10-07 15:42:41,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:42:41,798 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:41,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:41,800 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:41,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-07 15:42:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:42,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:42:42,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:42,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:42,280 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:42,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315926069] [2021-10-07 15:42:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315926069] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:42,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:42,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:42:42,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629665714] [2021-10-07 15:42:42,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:42:42,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:42:42,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:42:42,282 INFO L87 Difference]: Start difference. First operand 116 states and 323 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:43,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:43,027 INFO L93 Difference]: Finished difference Result 172 states and 427 transitions. [2021-10-07 15:42:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 15:42:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:43,033 INFO L225 Difference]: With dead ends: 172 [2021-10-07 15:42:43,033 INFO L226 Difference]: Without dead ends: 168 [2021-10-07 15:42:43,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:42:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-07 15:42:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 122. [2021-10-07 15:42:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.760330578512397) internal successors, (334), 121 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 334 transitions. [2021-10-07 15:42:43,041 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 334 transitions. Word has length 16 [2021-10-07 15:42:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:43,041 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 334 transitions. [2021-10-07 15:42:43,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 334 transitions. [2021-10-07 15:42:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:43,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:43,043 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:43,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:43,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:43,257 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash 492203476, now seen corresponding path program 14 times [2021-10-07 15:42:43,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:43,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031809263] [2021-10-07 15:42:43,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:42:43,259 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:43,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:43,260 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:43,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-07 15:42:43,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:42:43,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:43,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:42:43,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:43,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:43,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:43,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031809263] [2021-10-07 15:42:43,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031809263] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:43,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:43,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-10-07 15:42:43,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684712556] [2021-10-07 15:42:43,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 15:42:43,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:43,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 15:42:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:42:43,908 INFO L87 Difference]: Start difference. First operand 122 states and 334 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:44,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:44,986 INFO L93 Difference]: Finished difference Result 164 states and 426 transitions. [2021-10-07 15:42:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:42:44,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:44,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:44,990 INFO L225 Difference]: With dead ends: 164 [2021-10-07 15:42:44,990 INFO L226 Difference]: Without dead ends: 158 [2021-10-07 15:42:44,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 871.9ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:42:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-07 15:42:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 130. [2021-10-07 15:42:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.7674418604651163) internal successors, (357), 129 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:44,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 357 transitions. [2021-10-07 15:42:44,996 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 357 transitions. Word has length 16 [2021-10-07 15:42:44,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:44,996 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 357 transitions. [2021-10-07 15:42:44,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 357 transitions. [2021-10-07 15:42:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:44,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:44,997 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:45,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:45,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:45,210 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:45,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:45,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1063658282, now seen corresponding path program 15 times [2021-10-07 15:42:45,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:45,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227189965] [2021-10-07 15:42:45,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:42:45,213 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:45,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:45,214 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:45,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-07 15:42:45,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:42:45,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:45,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:42:45,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:45,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:45,755 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:45,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227189965] [2021-10-07 15:42:45,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227189965] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:45,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:45,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:42:45,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996077085] [2021-10-07 15:42:45,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:42:45,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:42:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:42:45,757 INFO L87 Difference]: Start difference. First operand 130 states and 357 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:46,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:46,483 INFO L93 Difference]: Finished difference Result 210 states and 527 transitions. [2021-10-07 15:42:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-07 15:42:46,484 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:46,486 INFO L225 Difference]: With dead ends: 210 [2021-10-07 15:42:46,486 INFO L226 Difference]: Without dead ends: 204 [2021-10-07 15:42:46,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 534.4ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:42:46,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-07 15:42:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 136. [2021-10-07 15:42:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.785185185185185) internal successors, (376), 135 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 376 transitions. [2021-10-07 15:42:46,493 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 376 transitions. Word has length 16 [2021-10-07 15:42:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:46,494 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 376 transitions. [2021-10-07 15:42:46,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 376 transitions. [2021-10-07 15:42:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:46,495 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:46,495 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:46,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-10-07 15:42:46,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:46,708 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:46,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:46,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1045224256, now seen corresponding path program 16 times [2021-10-07 15:42:46,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:46,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642825668] [2021-10-07 15:42:46,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:42:46,710 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:46,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:46,711 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:46,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-07 15:42:46,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:42:46,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:46,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:42:46,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:47,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:47,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:47,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642825668] [2021-10-07 15:42:47,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642825668] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:47,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:47,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:42:47,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961225880] [2021-10-07 15:42:47,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:42:47,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:42:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:42:47,219 INFO L87 Difference]: Start difference. First operand 136 states and 376 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:47,682 INFO L93 Difference]: Finished difference Result 158 states and 413 transitions. [2021-10-07 15:42:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 15:42:47,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:47,684 INFO L225 Difference]: With dead ends: 158 [2021-10-07 15:42:47,684 INFO L226 Difference]: Without dead ends: 150 [2021-10-07 15:42:47,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:42:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-07 15:42:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2021-10-07 15:42:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.741007194244604) internal successors, (381), 139 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 381 transitions. [2021-10-07 15:42:47,690 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 381 transitions. Word has length 16 [2021-10-07 15:42:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:47,690 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 381 transitions. [2021-10-07 15:42:47,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 381 transitions. [2021-10-07 15:42:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:47,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:47,691 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:47,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-10-07 15:42:47,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:47,900 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:47,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:47,900 INFO L82 PathProgramCache]: Analyzing trace with hash 940135845, now seen corresponding path program 17 times [2021-10-07 15:42:47,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:47,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302789349] [2021-10-07 15:42:47,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:42:47,902 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:47,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:47,903 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:47,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-07 15:42:48,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:42:48,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:48,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:42:48,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:48,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:48,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:48,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302789349] [2021-10-07 15:42:48,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302789349] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:48,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:48,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-07 15:42:48,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888306357] [2021-10-07 15:42:48,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:42:48,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:48,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:42:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:42:48,612 INFO L87 Difference]: Start difference. First operand 140 states and 381 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:50,530 INFO L93 Difference]: Finished difference Result 280 states and 693 transitions. [2021-10-07 15:42:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-07 15:42:50,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:50,533 INFO L225 Difference]: With dead ends: 280 [2021-10-07 15:42:50,533 INFO L226 Difference]: Without dead ends: 280 [2021-10-07 15:42:50,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1500.2ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:42:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-07 15:42:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 150. [2021-10-07 15:42:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.8322147651006713) internal successors, (422), 149 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 422 transitions. [2021-10-07 15:42:50,545 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 422 transitions. Word has length 16 [2021-10-07 15:42:50,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:50,545 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 422 transitions. [2021-10-07 15:42:50,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:50,546 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 422 transitions. [2021-10-07 15:42:50,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:50,546 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:50,546 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:50,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-10-07 15:42:50,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:50,760 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:50,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1383488582, now seen corresponding path program 18 times [2021-10-07 15:42:50,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:50,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954684339] [2021-10-07 15:42:50,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:42:50,761 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:50,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:50,762 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:50,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-07 15:42:51,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 15:42:51,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:51,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:42:51,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:51,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:51,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:51,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954684339] [2021-10-07 15:42:51,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954684339] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:51,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:51,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-07 15:42:51,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981563813] [2021-10-07 15:42:51,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:42:51,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:51,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:42:51,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:42:51,360 INFO L87 Difference]: Start difference. First operand 150 states and 422 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:52,016 INFO L93 Difference]: Finished difference Result 262 states and 686 transitions. [2021-10-07 15:42:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:42:52,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:52,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:52,018 INFO L225 Difference]: With dead ends: 262 [2021-10-07 15:42:52,018 INFO L226 Difference]: Without dead ends: 262 [2021-10-07 15:42:52,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:42:52,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-07 15:42:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 148. [2021-10-07 15:42:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.8503401360544216) internal successors, (419), 147 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 419 transitions. [2021-10-07 15:42:52,026 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 419 transitions. Word has length 16 [2021-10-07 15:42:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:52,026 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 419 transitions. [2021-10-07 15:42:52,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 419 transitions. [2021-10-07 15:42:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:52,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:52,028 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:52,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-10-07 15:42:52,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:52,241 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:52,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1022696615, now seen corresponding path program 19 times [2021-10-07 15:42:52,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:52,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165456488] [2021-10-07 15:42:52,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:42:52,244 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:52,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:52,245 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:52,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-07 15:42:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:42:52,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:42:52,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:52,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:52,720 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:52,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165456488] [2021-10-07 15:42:52,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165456488] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:52,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:52,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:42:52,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181878146] [2021-10-07 15:42:52,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:42:52,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:52,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:42:52,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:42:52,723 INFO L87 Difference]: Start difference. First operand 148 states and 419 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:52,991 INFO L93 Difference]: Finished difference Result 190 states and 504 transitions. [2021-10-07 15:42:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:42:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:52,993 INFO L225 Difference]: With dead ends: 190 [2021-10-07 15:42:52,993 INFO L226 Difference]: Without dead ends: 184 [2021-10-07 15:42:52,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:42:52,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-07 15:42:53,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 148. [2021-10-07 15:42:53,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.836734693877551) internal successors, (417), 147 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:53,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 417 transitions. [2021-10-07 15:42:53,002 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 417 transitions. Word has length 16 [2021-10-07 15:42:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:53,002 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 417 transitions. [2021-10-07 15:42:53,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:53,002 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 417 transitions. [2021-10-07 15:42:53,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:53,003 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:53,003 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:53,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:53,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:53,217 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:53,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1167105416, now seen corresponding path program 20 times [2021-10-07 15:42:53,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:53,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60915076] [2021-10-07 15:42:53,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:42:53,219 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:53,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:53,222 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:53,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-07 15:42:53,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:42:53,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:53,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:42:53,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:53,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:53,879 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:53,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60915076] [2021-10-07 15:42:53,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60915076] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:53,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:53,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-07 15:42:53,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069436862] [2021-10-07 15:42:53,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:42:53,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:53,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:42:53,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:42:53,882 INFO L87 Difference]: Start difference. First operand 148 states and 417 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:54,999 INFO L93 Difference]: Finished difference Result 238 states and 604 transitions. [2021-10-07 15:42:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:42:55,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:55,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:55,007 INFO L225 Difference]: With dead ends: 238 [2021-10-07 15:42:55,007 INFO L226 Difference]: Without dead ends: 238 [2021-10-07 15:42:55,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 965.3ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:42:55,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-10-07 15:42:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 156. [2021-10-07 15:42:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.870967741935484) internal successors, (445), 155 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 445 transitions. [2021-10-07 15:42:55,014 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 445 transitions. Word has length 16 [2021-10-07 15:42:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:55,015 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 445 transitions. [2021-10-07 15:42:55,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 445 transitions. [2021-10-07 15:42:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:55,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:55,016 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:55,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:55,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:55,229 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:55,230 INFO L82 PathProgramCache]: Analyzing trace with hash 2093136065, now seen corresponding path program 21 times [2021-10-07 15:42:55,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:55,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137989348] [2021-10-07 15:42:55,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:42:55,231 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:55,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:55,232 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:55,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-07 15:42:55,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:42:55,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:55,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:42:55,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:55,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:55,789 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:55,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137989348] [2021-10-07 15:42:55,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137989348] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:55,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:55,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:42:55,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109362269] [2021-10-07 15:42:55,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:42:55,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:55,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:42:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:42:55,791 INFO L87 Difference]: Start difference. First operand 156 states and 445 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:56,344 INFO L93 Difference]: Finished difference Result 230 states and 591 transitions. [2021-10-07 15:42:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:42:56,345 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:56,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:56,346 INFO L225 Difference]: With dead ends: 230 [2021-10-07 15:42:56,346 INFO L226 Difference]: Without dead ends: 226 [2021-10-07 15:42:56,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:42:56,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-10-07 15:42:56,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 162. [2021-10-07 15:42:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.8944099378881987) internal successors, (466), 161 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 466 transitions. [2021-10-07 15:42:56,353 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 466 transitions. Word has length 16 [2021-10-07 15:42:56,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:56,353 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 466 transitions. [2021-10-07 15:42:56,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 466 transitions. [2021-10-07 15:42:56,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:56,354 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:56,354 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:56,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:56,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:56,568 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:56,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:56,569 INFO L82 PathProgramCache]: Analyzing trace with hash -491783362, now seen corresponding path program 22 times [2021-10-07 15:42:56,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:56,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221634239] [2021-10-07 15:42:56,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:42:56,570 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:56,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:56,571 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:56,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-07 15:42:56,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:42:56,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:56,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:42:56,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:56,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:57,107 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:57,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221634239] [2021-10-07 15:42:57,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221634239] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:57,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:57,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:42:57,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654062256] [2021-10-07 15:42:57,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:42:57,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:42:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:42:57,109 INFO L87 Difference]: Start difference. First operand 162 states and 466 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:57,881 INFO L93 Difference]: Finished difference Result 278 states and 700 transitions. [2021-10-07 15:42:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-07 15:42:57,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:57,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:57,886 INFO L225 Difference]: With dead ends: 278 [2021-10-07 15:42:57,886 INFO L226 Difference]: Without dead ends: 274 [2021-10-07 15:42:57,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 528.1ms TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:42:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-07 15:42:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 166. [2021-10-07 15:42:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.909090909090909) internal successors, (480), 165 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 480 transitions. [2021-10-07 15:42:57,894 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 480 transitions. Word has length 16 [2021-10-07 15:42:57,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:57,894 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 480 transitions. [2021-10-07 15:42:57,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 480 transitions. [2021-10-07 15:42:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:57,895 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:57,896 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:57,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:58,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:58,109 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:58,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:58,110 INFO L82 PathProgramCache]: Analyzing trace with hash -492378008, now seen corresponding path program 23 times [2021-10-07 15:42:58,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:58,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082000753] [2021-10-07 15:42:58,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:42:58,111 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:58,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:58,113 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:58,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-07 15:42:58,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:42:58,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:58,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:42:58,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:42:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:58,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:42:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:42:58,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:42:58,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082000753] [2021-10-07 15:42:58,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082000753] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:42:58,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:42:58,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:42:58,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197724979] [2021-10-07 15:42:58,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:42:58,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:42:58,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:42:58,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:42:58,675 INFO L87 Difference]: Start difference. First operand 166 states and 480 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:42:59,438 INFO L93 Difference]: Finished difference Result 232 states and 617 transitions. [2021-10-07 15:42:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-07 15:42:59,438 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:42:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:42:59,440 INFO L225 Difference]: With dead ends: 232 [2021-10-07 15:42:59,440 INFO L226 Difference]: Without dead ends: 228 [2021-10-07 15:42:59,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 580.0ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:42:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-10-07 15:42:59,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 166. [2021-10-07 15:42:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.896969696969697) internal successors, (478), 165 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 478 transitions. [2021-10-07 15:42:59,446 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 478 transitions. Word has length 16 [2021-10-07 15:42:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:42:59,447 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 478 transitions. [2021-10-07 15:42:59,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:42:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 478 transitions. [2021-10-07 15:42:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:42:59,448 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:42:59,448 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:42:59,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-07 15:42:59,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:42:59,661 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:42:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:42:59,662 INFO L82 PathProgramCache]: Analyzing trace with hash -634334471, now seen corresponding path program 24 times [2021-10-07 15:42:59,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:42:59,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318943916] [2021-10-07 15:42:59,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:42:59,663 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:42:59,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:42:59,664 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:42:59,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-07 15:42:59,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:42:59,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:42:59,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:42:59,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:00,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:00,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:00,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318943916] [2021-10-07 15:43:00,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318943916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:00,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:00,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:43:00,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273798190] [2021-10-07 15:43:00,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:43:00,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:00,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:43:00,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:43:00,254 INFO L87 Difference]: Start difference. First operand 166 states and 478 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:00,579 INFO L93 Difference]: Finished difference Result 270 states and 678 transitions. [2021-10-07 15:43:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:43:00,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:43:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:00,582 INFO L225 Difference]: With dead ends: 270 [2021-10-07 15:43:00,582 INFO L226 Difference]: Without dead ends: 270 [2021-10-07 15:43:00,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:43:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-10-07 15:43:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 166. [2021-10-07 15:43:00,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.909090909090909) internal successors, (480), 165 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 480 transitions. [2021-10-07 15:43:00,589 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 480 transitions. Word has length 16 [2021-10-07 15:43:00,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:00,589 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 480 transitions. [2021-10-07 15:43:00,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 480 transitions. [2021-10-07 15:43:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:43:00,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:00,590 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:00,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:00,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:00,804 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:00,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:00,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1746973410, now seen corresponding path program 25 times [2021-10-07 15:43:00,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:00,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991366606] [2021-10-07 15:43:00,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:43:00,806 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:00,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:00,807 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:00,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-07 15:43:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:43:01,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:43:01,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:01,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:01,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:01,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991366606] [2021-10-07 15:43:01,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991366606] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:01,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:01,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-07 15:43:01,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395797951] [2021-10-07 15:43:01,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:43:01,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:01,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:43:01,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:43:01,502 INFO L87 Difference]: Start difference. First operand 166 states and 480 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:02,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:02,928 INFO L93 Difference]: Finished difference Result 270 states and 700 transitions. [2021-10-07 15:43:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:43:02,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:43:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:02,931 INFO L225 Difference]: With dead ends: 270 [2021-10-07 15:43:02,931 INFO L226 Difference]: Without dead ends: 270 [2021-10-07 15:43:02,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1109.5ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:43:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-10-07 15:43:02,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 176. [2021-10-07 15:43:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.954285714285714) internal successors, (517), 175 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 517 transitions. [2021-10-07 15:43:02,943 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 517 transitions. Word has length 16 [2021-10-07 15:43:02,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:02,943 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 517 transitions. [2021-10-07 15:43:02,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:02,943 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 517 transitions. [2021-10-07 15:43:02,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:43:02,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:02,944 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:02,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-10-07 15:43:03,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:03,147 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:03,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:03,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1513268071, now seen corresponding path program 26 times [2021-10-07 15:43:03,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:03,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284739413] [2021-10-07 15:43:03,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:43:03,149 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:03,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:03,150 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:03,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-07 15:43:03,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:43:03,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:03,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:43:03,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:03,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:03,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:03,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284739413] [2021-10-07 15:43:03,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284739413] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:03,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:03,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:43:03,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409762233] [2021-10-07 15:43:03,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:43:03,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:03,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:43:03,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:43:03,753 INFO L87 Difference]: Start difference. First operand 176 states and 517 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:04,624 INFO L93 Difference]: Finished difference Result 232 states and 616 transitions. [2021-10-07 15:43:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:43:04,625 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:43:04,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:04,626 INFO L225 Difference]: With dead ends: 232 [2021-10-07 15:43:04,626 INFO L226 Difference]: Without dead ends: 228 [2021-10-07 15:43:04,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 552.6ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:43:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-10-07 15:43:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 178. [2021-10-07 15:43:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.937853107344633) internal successors, (520), 177 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 520 transitions. [2021-10-07 15:43:04,633 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 520 transitions. Word has length 16 [2021-10-07 15:43:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:04,633 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 520 transitions. [2021-10-07 15:43:04,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:04,633 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 520 transitions. [2021-10-07 15:43:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:43:04,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:04,634 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:04,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-10-07 15:43:04,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:04,848 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:04,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1071651356, now seen corresponding path program 27 times [2021-10-07 15:43:04,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:04,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991949060] [2021-10-07 15:43:04,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:43:04,850 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:04,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:04,851 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:04,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-07 15:43:05,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:43:05,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:05,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:43:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:05,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:05,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:05,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991949060] [2021-10-07 15:43:05,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991949060] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:05,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:05,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-10-07 15:43:05,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676390985] [2021-10-07 15:43:05,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 15:43:05,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:05,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 15:43:05,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:43:05,615 INFO L87 Difference]: Start difference. First operand 178 states and 520 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:08,245 INFO L93 Difference]: Finished difference Result 324 states and 841 transitions. [2021-10-07 15:43:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:43:08,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:43:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:08,248 INFO L225 Difference]: With dead ends: 324 [2021-10-07 15:43:08,248 INFO L226 Difference]: Without dead ends: 324 [2021-10-07 15:43:08,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2223.3ms TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:43:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-10-07 15:43:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 188. [2021-10-07 15:43:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0320855614973263) internal successors, (567), 187 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 567 transitions. [2021-10-07 15:43:08,253 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 567 transitions. Word has length 16 [2021-10-07 15:43:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:08,254 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 567 transitions. [2021-10-07 15:43:08,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 567 transitions. [2021-10-07 15:43:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:43:08,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:08,254 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:08,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:08,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:08,456 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:08,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1871090493, now seen corresponding path program 28 times [2021-10-07 15:43:08,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:08,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158025748] [2021-10-07 15:43:08,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:43:08,458 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:08,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:08,459 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:08,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-07 15:43:08,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:43:08,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:08,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:43:08,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:08,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:09,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:09,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158025748] [2021-10-07 15:43:09,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158025748] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:09,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:09,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:43:09,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037149435] [2021-10-07 15:43:09,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:43:09,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:09,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:43:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:43:09,036 INFO L87 Difference]: Start difference. First operand 188 states and 567 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:09,816 INFO L93 Difference]: Finished difference Result 264 states and 727 transitions. [2021-10-07 15:43:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 15:43:09,817 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:43:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:09,819 INFO L225 Difference]: With dead ends: 264 [2021-10-07 15:43:09,819 INFO L226 Difference]: Without dead ends: 258 [2021-10-07 15:43:09,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:43:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-10-07 15:43:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 194. [2021-10-07 15:43:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 3.0466321243523318) internal successors, (588), 193 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 588 transitions. [2021-10-07 15:43:09,826 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 588 transitions. Word has length 16 [2021-10-07 15:43:09,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:09,826 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 588 transitions. [2021-10-07 15:43:09,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 588 transitions. [2021-10-07 15:43:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:43:09,828 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:09,828 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:09,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-10-07 15:43:10,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:10,041 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:10,042 INFO L82 PathProgramCache]: Analyzing trace with hash -500196550, now seen corresponding path program 29 times [2021-10-07 15:43:10,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:10,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061811376] [2021-10-07 15:43:10,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:43:10,043 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:10,045 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:10,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-07 15:43:10,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:43:10,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:10,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:43:10,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:10,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:10,719 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:10,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061811376] [2021-10-07 15:43:10,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061811376] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:10,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:10,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:43:10,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861770406] [2021-10-07 15:43:10,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:43:10,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:10,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:43:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:43:10,721 INFO L87 Difference]: Start difference. First operand 194 states and 588 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:11,725 INFO L93 Difference]: Finished difference Result 336 states and 860 transitions. [2021-10-07 15:43:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:43:11,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:43:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:11,728 INFO L225 Difference]: With dead ends: 336 [2021-10-07 15:43:11,728 INFO L226 Difference]: Without dead ends: 336 [2021-10-07 15:43:11,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 768.2ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:43:11,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-10-07 15:43:11,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 200. [2021-10-07 15:43:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 3.0603015075376883) internal successors, (609), 199 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 609 transitions. [2021-10-07 15:43:11,736 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 609 transitions. Word has length 16 [2021-10-07 15:43:11,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:11,737 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 609 transitions. [2021-10-07 15:43:11,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:11,737 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 609 transitions. [2021-10-07 15:43:11,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:43:11,738 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:11,738 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:11,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:11,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:11,950 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:11,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:11,951 INFO L82 PathProgramCache]: Analyzing trace with hash -500791196, now seen corresponding path program 30 times [2021-10-07 15:43:11,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:11,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186403306] [2021-10-07 15:43:11,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:43:11,952 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:11,954 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:11,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-07 15:43:12,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 15:43:12,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:12,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:43:12,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:12,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:12,565 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:12,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186403306] [2021-10-07 15:43:12,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186403306] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:12,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:12,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:43:12,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722835993] [2021-10-07 15:43:12,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:43:12,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:12,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:43:12,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:43:12,567 INFO L87 Difference]: Start difference. First operand 200 states and 609 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:13,468 INFO L93 Difference]: Finished difference Result 300 states and 820 transitions. [2021-10-07 15:43:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:43:13,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:43:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:13,471 INFO L225 Difference]: With dead ends: 300 [2021-10-07 15:43:13,471 INFO L226 Difference]: Without dead ends: 294 [2021-10-07 15:43:13,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 544.2ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:43:13,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-10-07 15:43:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 206. [2021-10-07 15:43:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 3.073170731707317) internal successors, (630), 205 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 630 transitions. [2021-10-07 15:43:13,479 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 630 transitions. Word has length 16 [2021-10-07 15:43:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:13,479 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 630 transitions. [2021-10-07 15:43:13,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 630 transitions. [2021-10-07 15:43:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:43:13,481 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:13,481 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:13,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:13,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:13,694 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:13,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:13,695 INFO L82 PathProgramCache]: Analyzing trace with hash -519225222, now seen corresponding path program 31 times [2021-10-07 15:43:13,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:13,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085112732] [2021-10-07 15:43:13,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:43:13,697 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:13,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:13,698 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:13,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-07 15:43:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:43:14,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 15:43:14,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:14,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:14,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:14,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085112732] [2021-10-07 15:43:14,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085112732] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:14,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:14,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-07 15:43:14,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482058170] [2021-10-07 15:43:14,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:43:14,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:14,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:43:14,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:43:14,255 INFO L87 Difference]: Start difference. First operand 206 states and 630 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:14,856 INFO L93 Difference]: Finished difference Result 262 states and 736 transitions. [2021-10-07 15:43:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:43:14,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:43:14,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:14,858 INFO L225 Difference]: With dead ends: 262 [2021-10-07 15:43:14,858 INFO L226 Difference]: Without dead ends: 254 [2021-10-07 15:43:14,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:43:14,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-10-07 15:43:14,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 206. [2021-10-07 15:43:14,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 3.0634146341463415) internal successors, (628), 205 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 628 transitions. [2021-10-07 15:43:14,865 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 628 transitions. Word has length 16 [2021-10-07 15:43:14,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:14,865 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 628 transitions. [2021-10-07 15:43:14,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:14,865 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 628 transitions. [2021-10-07 15:43:14,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:43:14,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:14,866 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:14,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:15,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:15,067 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:15,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:15,068 INFO L82 PathProgramCache]: Analyzing trace with hash -624313633, now seen corresponding path program 32 times [2021-10-07 15:43:15,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:15,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416262185] [2021-10-07 15:43:15,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:43:15,070 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:15,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:15,071 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:15,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-10-07 15:43:15,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:43:15,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:15,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:43:15,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:15,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:15,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:15,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416262185] [2021-10-07 15:43:15,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416262185] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:15,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:15,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-07 15:43:15,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147240672] [2021-10-07 15:43:15,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:43:15,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:15,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:43:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:43:15,809 INFO L87 Difference]: Start difference. First operand 206 states and 628 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:17,972 INFO L93 Difference]: Finished difference Result 330 states and 884 transitions. [2021-10-07 15:43:17,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:43:17,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:43:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:17,975 INFO L225 Difference]: With dead ends: 330 [2021-10-07 15:43:17,976 INFO L226 Difference]: Without dead ends: 330 [2021-10-07 15:43:17,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1746.4ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:43:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-10-07 15:43:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 206. [2021-10-07 15:43:17,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 3.0634146341463415) internal successors, (628), 205 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:17,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 628 transitions. [2021-10-07 15:43:17,983 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 628 transitions. Word has length 16 [2021-10-07 15:43:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:17,984 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 628 transitions. [2021-10-07 15:43:17,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 628 transitions. [2021-10-07 15:43:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:43:17,985 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:17,985 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:17,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:18,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:18,192 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:18,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:18,192 INFO L82 PathProgramCache]: Analyzing trace with hash 525148482, now seen corresponding path program 33 times [2021-10-07 15:43:18,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:18,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862195903] [2021-10-07 15:43:18,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:43:18,193 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:18,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:18,195 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:18,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-10-07 15:43:18,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:43:18,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:43:18,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:19,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:20,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:20,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862195903] [2021-10-07 15:43:20,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862195903] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:20,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:20,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:43:20,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186883797] [2021-10-07 15:43:20,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-07 15:43:20,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:20,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-07 15:43:20,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:43:20,713 INFO L87 Difference]: Start difference. First operand 206 states and 628 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:22,020 INFO L93 Difference]: Finished difference Result 314 states and 862 transitions. [2021-10-07 15:43:22,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:43:22,021 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:43:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:22,023 INFO L225 Difference]: With dead ends: 314 [2021-10-07 15:43:22,023 INFO L226 Difference]: Without dead ends: 296 [2021-10-07 15:43:22,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1975.5ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:43:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-07 15:43:22,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-10-07 15:43:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.0580912863070537) internal successors, (737), 241 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 737 transitions. [2021-10-07 15:43:22,030 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 737 transitions. Word has length 17 [2021-10-07 15:43:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:22,031 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 737 transitions. [2021-10-07 15:43:22,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 737 transitions. [2021-10-07 15:43:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:43:22,032 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:22,032 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:22,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:22,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:22,246 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:22,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:22,247 INFO L82 PathProgramCache]: Analyzing trace with hash 832683740, now seen corresponding path program 34 times [2021-10-07 15:43:22,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:22,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906910510] [2021-10-07 15:43:22,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:43:22,248 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:22,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:22,249 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:22,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-07 15:43:22,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:43:22,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:22,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:43:22,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:23,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:26,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:26,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906910510] [2021-10-07 15:43:26,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906910510] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:26,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:26,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 15:43:26,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954115431] [2021-10-07 15:43:26,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:43:26,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:26,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:43:26,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=199, Unknown=1, NotChecked=0, Total=240 [2021-10-07 15:43:26,037 INFO L87 Difference]: Start difference. First operand 242 states and 737 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:27,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:27,071 INFO L93 Difference]: Finished difference Result 343 states and 918 transitions. [2021-10-07 15:43:27,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:43:27,071 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:43:27,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:27,074 INFO L225 Difference]: With dead ends: 343 [2021-10-07 15:43:27,074 INFO L226 Difference]: Without dead ends: 338 [2021-10-07 15:43:27,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 3137.1ms TimeCoverageRelationStatistics Valid=64, Invalid=277, Unknown=1, NotChecked=0, Total=342 [2021-10-07 15:43:27,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-10-07 15:43:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 244. [2021-10-07 15:43:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.0699588477366255) internal successors, (746), 243 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 746 transitions. [2021-10-07 15:43:27,082 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 746 transitions. Word has length 17 [2021-10-07 15:43:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:27,083 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 746 transitions. [2021-10-07 15:43:27,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 746 transitions. [2021-10-07 15:43:27,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:43:27,084 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:27,084 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:27,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:27,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:27,295 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1036454180, now seen corresponding path program 35 times [2021-10-07 15:43:27,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:27,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232034805] [2021-10-07 15:43:27,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:43:27,297 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:27,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:27,298 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:27,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-10-07 15:43:28,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:43:28,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:28,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:43:28,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:28,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:30,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:30,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232034805] [2021-10-07 15:43:30,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232034805] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:30,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:30,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 15:43:30,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191239910] [2021-10-07 15:43:30,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:43:30,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:43:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:43:30,612 INFO L87 Difference]: Start difference. First operand 244 states and 746 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:32,539 INFO L93 Difference]: Finished difference Result 328 states and 894 transitions. [2021-10-07 15:43:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:43:32,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:43:32,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:32,542 INFO L225 Difference]: With dead ends: 328 [2021-10-07 15:43:32,542 INFO L226 Difference]: Without dead ends: 318 [2021-10-07 15:43:32,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2304.0ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:43:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-10-07 15:43:32,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 248. [2021-10-07 15:43:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.08502024291498) internal successors, (762), 247 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 762 transitions. [2021-10-07 15:43:32,549 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 762 transitions. Word has length 17 [2021-10-07 15:43:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:32,550 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 762 transitions. [2021-10-07 15:43:32,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:32,550 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 762 transitions. [2021-10-07 15:43:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:43:32,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:32,551 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:32,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:32,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:32,757 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:32,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:32,758 INFO L82 PathProgramCache]: Analyzing trace with hash 832089094, now seen corresponding path program 36 times [2021-10-07 15:43:32,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:32,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916176864] [2021-10-07 15:43:32,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:43:32,759 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:32,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:32,760 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:32,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-07 15:43:33,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 15:43:33,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:33,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:43:33,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:33,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:35,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:35,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916176864] [2021-10-07 15:43:35,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916176864] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:35,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:35,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 15:43:35,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125391174] [2021-10-07 15:43:35,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:43:35,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:35,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:43:35,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:43:35,809 INFO L87 Difference]: Start difference. First operand 248 states and 762 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:38,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:38,044 INFO L93 Difference]: Finished difference Result 317 states and 876 transitions. [2021-10-07 15:43:38,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:43:38,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:43:38,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:38,047 INFO L225 Difference]: With dead ends: 317 [2021-10-07 15:43:38,047 INFO L226 Difference]: Without dead ends: 312 [2021-10-07 15:43:38,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2579.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:43:38,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-10-07 15:43:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 248. [2021-10-07 15:43:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.08502024291498) internal successors, (762), 247 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 762 transitions. [2021-10-07 15:43:38,056 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 762 transitions. Word has length 17 [2021-10-07 15:43:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:38,056 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 762 transitions. [2021-10-07 15:43:38,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 762 transitions. [2021-10-07 15:43:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:43:38,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:38,059 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:38,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:38,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:38,273 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1594770942, now seen corresponding path program 37 times [2021-10-07 15:43:38,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:38,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939900172] [2021-10-07 15:43:38,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:43:38,275 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:38,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:38,276 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:38,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-10-07 15:43:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:43:38,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:43:38,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:39,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:41,164 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:41,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939900172] [2021-10-07 15:43:41,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939900172] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:41,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:41,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-10-07 15:43:41,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234384604] [2021-10-07 15:43:41,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 15:43:41,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:41,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 15:43:41,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:43:41,166 INFO L87 Difference]: Start difference. First operand 248 states and 762 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:42,268 INFO L93 Difference]: Finished difference Result 303 states and 872 transitions. [2021-10-07 15:43:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:43:42,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:43:42,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:42,270 INFO L225 Difference]: With dead ends: 303 [2021-10-07 15:43:42,270 INFO L226 Difference]: Without dead ends: 298 [2021-10-07 15:43:42,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2009.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:43:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-10-07 15:43:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 256. [2021-10-07 15:43:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.1058823529411765) internal successors, (792), 255 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 792 transitions. [2021-10-07 15:43:42,278 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 792 transitions. Word has length 17 [2021-10-07 15:43:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:42,278 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 792 transitions. [2021-10-07 15:43:42,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 792 transitions. [2021-10-07 15:43:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:43:42,280 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:42,280 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:42,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:42,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:42,494 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:42,495 INFO L82 PathProgramCache]: Analyzing trace with hash -937882914, now seen corresponding path program 38 times [2021-10-07 15:43:42,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:42,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405471681] [2021-10-07 15:43:42,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:43:42,496 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:42,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:42,497 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:42,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-10-07 15:43:42,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:43:42,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:42,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:43:42,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:43,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:44,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:44,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405471681] [2021-10-07 15:43:44,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405471681] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:44,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:44,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-07 15:43:44,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234509536] [2021-10-07 15:43:44,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:43:44,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:43:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:43:44,660 INFO L87 Difference]: Start difference. First operand 256 states and 792 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:45,560 INFO L93 Difference]: Finished difference Result 323 states and 916 transitions. [2021-10-07 15:43:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:43:45,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:43:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:45,563 INFO L225 Difference]: With dead ends: 323 [2021-10-07 15:43:45,563 INFO L226 Difference]: Without dead ends: 318 [2021-10-07 15:43:45,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1232.7ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:43:45,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-10-07 15:43:45,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 260. [2021-10-07 15:43:45,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.1196911196911197) internal successors, (808), 259 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 808 transitions. [2021-10-07 15:43:45,572 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 808 transitions. Word has length 17 [2021-10-07 15:43:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:45,572 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 808 transitions. [2021-10-07 15:43:45,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:45,572 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 808 transitions. [2021-10-07 15:43:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:43:45,573 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:45,574 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:45,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:45,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:45,788 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:45,789 INFO L82 PathProgramCache]: Analyzing trace with hash -734112474, now seen corresponding path program 39 times [2021-10-07 15:43:45,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:45,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580802677] [2021-10-07 15:43:45,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:43:45,790 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:45,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:45,792 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:45,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-10-07 15:43:46,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:43:46,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:46,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:43:46,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:46,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:47,462 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:47,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580802677] [2021-10-07 15:43:47,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580802677] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:47,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:47,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-07 15:43:47,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264972659] [2021-10-07 15:43:47,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:43:47,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:47,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:43:47,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:43:47,464 INFO L87 Difference]: Start difference. First operand 260 states and 808 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:49,150 INFO L93 Difference]: Finished difference Result 313 states and 900 transitions. [2021-10-07 15:43:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:43:49,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:43:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:49,153 INFO L225 Difference]: With dead ends: 313 [2021-10-07 15:43:49,153 INFO L226 Difference]: Without dead ends: 308 [2021-10-07 15:43:49,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 733.8ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:43:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-07 15:43:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 260. [2021-10-07 15:43:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.1196911196911197) internal successors, (808), 259 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 808 transitions. [2021-10-07 15:43:49,161 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 808 transitions. Word has length 17 [2021-10-07 15:43:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:49,161 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 808 transitions. [2021-10-07 15:43:49,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 808 transitions. [2021-10-07 15:43:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:43:49,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:49,162 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:49,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:49,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:49,377 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:49,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1558371100, now seen corresponding path program 40 times [2021-10-07 15:43:49,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:49,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217741101] [2021-10-07 15:43:49,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:43:49,379 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:49,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:49,380 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:49,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-10-07 15:43:49,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:43:49,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:49,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:43:49,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:50,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:52,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:52,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217741101] [2021-10-07 15:43:52,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217741101] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:52,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:52,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-07 15:43:52,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363179714] [2021-10-07 15:43:52,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-07 15:43:52,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:52,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-07 15:43:52,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:43:52,507 INFO L87 Difference]: Start difference. First operand 260 states and 808 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:43:53,686 INFO L93 Difference]: Finished difference Result 372 states and 1065 transitions. [2021-10-07 15:43:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:43:53,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:43:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:43:53,690 INFO L225 Difference]: With dead ends: 372 [2021-10-07 15:43:53,690 INFO L226 Difference]: Without dead ends: 358 [2021-10-07 15:43:53,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2609.2ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:43:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-10-07 15:43:53,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 298. [2021-10-07 15:43:53,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.1683501683501682) internal successors, (941), 297 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 941 transitions. [2021-10-07 15:43:53,698 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 941 transitions. Word has length 17 [2021-10-07 15:43:53,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:43:53,698 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 941 transitions. [2021-10-07 15:43:53,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:43:53,698 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 941 transitions. [2021-10-07 15:43:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:43:53,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:43:53,700 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:43:53,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-10-07 15:43:53,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:43:53,914 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:43:53,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:43:53,915 INFO L82 PathProgramCache]: Analyzing trace with hash -647762368, now seen corresponding path program 41 times [2021-10-07 15:43:53,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:43:53,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883415652] [2021-10-07 15:43:53,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:43:53,916 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:43:53,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:43:53,917 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:43:53,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-10-07 15:43:55,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:43:55,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:43:55,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:43:55,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:43:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:55,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:43:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:43:59,241 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:43:59,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883415652] [2021-10-07 15:43:59,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883415652] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:43:59,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:43:59,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 15:43:59,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741365178] [2021-10-07 15:43:59,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:43:59,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:43:59,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:43:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=200, Unknown=1, NotChecked=0, Total=240 [2021-10-07 15:43:59,244 INFO L87 Difference]: Start difference. First operand 298 states and 941 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:01,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:01,887 INFO L93 Difference]: Finished difference Result 399 states and 1148 transitions. [2021-10-07 15:44:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:44:01,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:44:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:01,890 INFO L225 Difference]: With dead ends: 399 [2021-10-07 15:44:01,890 INFO L226 Difference]: Without dead ends: 394 [2021-10-07 15:44:01,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 4915.5ms TimeCoverageRelationStatistics Valid=66, Invalid=313, Unknown=1, NotChecked=0, Total=380 [2021-10-07 15:44:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-10-07 15:44:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 312. [2021-10-07 15:44:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.215434083601286) internal successors, (1000), 311 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 1000 transitions. [2021-10-07 15:44:01,900 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 1000 transitions. Word has length 17 [2021-10-07 15:44:01,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:01,900 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 1000 transitions. [2021-10-07 15:44:01,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 1000 transitions. [2021-10-07 15:44:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:44:01,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:01,901 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:01,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-10-07 15:44:02,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:02,117 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:02,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash 9125660, now seen corresponding path program 42 times [2021-10-07 15:44:02,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:02,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091250449] [2021-10-07 15:44:02,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:44:02,119 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:02,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:02,120 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:02,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-10-07 15:44:02,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:44:02,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:02,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:44:02,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:03,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:04,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:04,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091250449] [2021-10-07 15:44:04,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091250449] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:04,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:04,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 15:44:04,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581166341] [2021-10-07 15:44:04,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:44:04,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:04,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:44:04,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:44:04,956 INFO L87 Difference]: Start difference. First operand 312 states and 1000 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:06,342 INFO L93 Difference]: Finished difference Result 402 states and 1162 transitions. [2021-10-07 15:44:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:44:06,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:44:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:06,345 INFO L225 Difference]: With dead ends: 402 [2021-10-07 15:44:06,345 INFO L226 Difference]: Without dead ends: 388 [2021-10-07 15:44:06,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2238.2ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:44:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-10-07 15:44:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 312. [2021-10-07 15:44:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.2090032154340835) internal successors, (998), 311 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 998 transitions. [2021-10-07 15:44:06,353 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 998 transitions. Word has length 17 [2021-10-07 15:44:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:06,353 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 998 transitions. [2021-10-07 15:44:06,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 998 transitions. [2021-10-07 15:44:06,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:44:06,354 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:06,354 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:06,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-10-07 15:44:06,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:06,555 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:06,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:06,556 INFO L82 PathProgramCache]: Analyzing trace with hash 212896100, now seen corresponding path program 43 times [2021-10-07 15:44:06,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:06,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527042401] [2021-10-07 15:44:06,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:44:06,557 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:06,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:06,558 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:06,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-10-07 15:44:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:44:07,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:44:07,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:07,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:08,681 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:08,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527042401] [2021-10-07 15:44:08,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527042401] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:08,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:08,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 15:44:08,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353034434] [2021-10-07 15:44:08,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:44:08,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:08,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:44:08,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:44:08,683 INFO L87 Difference]: Start difference. First operand 312 states and 998 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:09,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:09,981 INFO L93 Difference]: Finished difference Result 389 states and 1135 transitions. [2021-10-07 15:44:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:44:09,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:44:09,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:09,984 INFO L225 Difference]: With dead ends: 389 [2021-10-07 15:44:09,984 INFO L226 Difference]: Without dead ends: 384 [2021-10-07 15:44:09,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1472.0ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:44:09,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-10-07 15:44:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 308. [2021-10-07 15:44:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.198697068403909) internal successors, (982), 307 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 982 transitions. [2021-10-07 15:44:09,994 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 982 transitions. Word has length 17 [2021-10-07 15:44:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:09,994 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 982 transitions. [2021-10-07 15:44:09,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 982 transitions. [2021-10-07 15:44:09,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:44:09,996 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:09,996 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:10,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2021-10-07 15:44:10,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:10,201 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:10,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:10,202 INFO L82 PathProgramCache]: Analyzing trace with hash 599014492, now seen corresponding path program 44 times [2021-10-07 15:44:10,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:10,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376381151] [2021-10-07 15:44:10,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:44:10,203 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:10,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:10,204 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:10,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-10-07 15:44:10,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:44:10,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:44:10,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:11,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:12,474 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:12,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376381151] [2021-10-07 15:44:12,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376381151] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:12,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:12,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-07 15:44:12,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248658654] [2021-10-07 15:44:12,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:44:12,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:12,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:44:12,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:44:12,476 INFO L87 Difference]: Start difference. First operand 308 states and 982 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:13,022 INFO L93 Difference]: Finished difference Result 389 states and 1136 transitions. [2021-10-07 15:44:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:44:13,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:44:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:13,026 INFO L225 Difference]: With dead ends: 389 [2021-10-07 15:44:13,026 INFO L226 Difference]: Without dead ends: 384 [2021-10-07 15:44:13,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1283.8ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:44:13,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-10-07 15:44:13,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 312. [2021-10-07 15:44:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.215434083601286) internal successors, (1000), 311 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 1000 transitions. [2021-10-07 15:44:13,034 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 1000 transitions. Word has length 17 [2021-10-07 15:44:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:13,034 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 1000 transitions. [2021-10-07 15:44:13,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 1000 transitions. [2021-10-07 15:44:13,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:44:13,036 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:13,036 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:13,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2021-10-07 15:44:13,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:13,239 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:13,240 INFO L82 PathProgramCache]: Analyzing trace with hash 802784932, now seen corresponding path program 45 times [2021-10-07 15:44:13,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:13,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406725769] [2021-10-07 15:44:13,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:44:13,241 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:13,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:13,242 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:13,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-10-07 15:44:13,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:44:13,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:13,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:44:13,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:14,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:15,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:15,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406725769] [2021-10-07 15:44:15,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406725769] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:15,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:15,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-07 15:44:15,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900459703] [2021-10-07 15:44:15,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:44:15,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:15,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:44:15,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:44:15,668 INFO L87 Difference]: Start difference. First operand 312 states and 1000 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:16,222 INFO L93 Difference]: Finished difference Result 385 states and 1130 transitions. [2021-10-07 15:44:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:44:16,228 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:44:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:16,231 INFO L225 Difference]: With dead ends: 385 [2021-10-07 15:44:16,231 INFO L226 Difference]: Without dead ends: 380 [2021-10-07 15:44:16,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1370.6ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:44:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-10-07 15:44:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 314. [2021-10-07 15:44:16,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.2172523961661343) internal successors, (1007), 313 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1007 transitions. [2021-10-07 15:44:16,238 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1007 transitions. Word has length 17 [2021-10-07 15:44:16,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:16,238 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 1007 transitions. [2021-10-07 15:44:16,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:16,239 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1007 transitions. [2021-10-07 15:44:16,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:44:16,239 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:16,239 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:16,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-10-07 15:44:16,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:16,441 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:16,441 INFO L82 PathProgramCache]: Analyzing trace with hash 598419846, now seen corresponding path program 46 times [2021-10-07 15:44:16,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:16,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234870825] [2021-10-07 15:44:16,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:44:16,443 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:16,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:16,444 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:16,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-10-07 15:44:16,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:44:16,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:16,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:44:16,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:17,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:18,927 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:18,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234870825] [2021-10-07 15:44:18,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234870825] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:18,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:18,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-10-07 15:44:18,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129277285] [2021-10-07 15:44:18,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 15:44:18,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 15:44:18,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:44:18,930 INFO L87 Difference]: Start difference. First operand 314 states and 1007 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:19,515 INFO L93 Difference]: Finished difference Result 369 states and 1101 transitions. [2021-10-07 15:44:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 15:44:19,516 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:44:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:19,520 INFO L225 Difference]: With dead ends: 369 [2021-10-07 15:44:19,520 INFO L226 Difference]: Without dead ends: 364 [2021-10-07 15:44:19,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1481.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:44:19,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-10-07 15:44:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 310. [2021-10-07 15:44:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.207119741100324) internal successors, (991), 309 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 991 transitions. [2021-10-07 15:44:19,529 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 991 transitions. Word has length 17 [2021-10-07 15:44:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:19,529 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 991 transitions. [2021-10-07 15:44:19,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 991 transitions. [2021-10-07 15:44:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:44:19,531 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:19,531 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:19,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-10-07 15:44:19,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:19,745 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:19,745 INFO L82 PathProgramCache]: Analyzing trace with hash -900438311, now seen corresponding path program 47 times [2021-10-07 15:44:19,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:19,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915114390] [2021-10-07 15:44:19,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:44:19,747 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:19,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:19,748 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:19,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-10-07 15:44:20,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:44:20,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:20,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:44:20,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:20,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:20,787 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:20,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915114390] [2021-10-07 15:44:20,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915114390] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:20,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:20,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:44:20,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138310200] [2021-10-07 15:44:20,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:44:20,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:20,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:44:20,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:44:20,789 INFO L87 Difference]: Start difference. First operand 310 states and 991 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:21,234 INFO L93 Difference]: Finished difference Result 402 states and 1219 transitions. [2021-10-07 15:44:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:44:21,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:44:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:21,237 INFO L225 Difference]: With dead ends: 402 [2021-10-07 15:44:21,237 INFO L226 Difference]: Without dead ends: 384 [2021-10-07 15:44:21,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:44:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-10-07 15:44:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 304. [2021-10-07 15:44:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.227722772277228) internal successors, (978), 303 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 978 transitions. [2021-10-07 15:44:21,246 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 978 transitions. Word has length 18 [2021-10-07 15:44:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:21,246 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 978 transitions. [2021-10-07 15:44:21,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 978 transitions. [2021-10-07 15:44:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:44:21,247 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:21,247 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:21,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-10-07 15:44:21,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:21,461 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:21,461 INFO L82 PathProgramCache]: Analyzing trace with hash -304835868, now seen corresponding path program 48 times [2021-10-07 15:44:21,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:21,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343634249] [2021-10-07 15:44:21,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:44:21,463 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:21,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:21,464 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:21,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-10-07 15:44:22,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:44:22,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:22,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:44:22,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:22,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:22,597 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:22,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343634249] [2021-10-07 15:44:22,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343634249] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:22,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:22,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:44:22,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899380365] [2021-10-07 15:44:22,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:44:22,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:22,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:44:22,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:44:22,599 INFO L87 Difference]: Start difference. First operand 304 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:23,639 INFO L93 Difference]: Finished difference Result 542 states and 1625 transitions. [2021-10-07 15:44:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:44:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:44:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:23,643 INFO L225 Difference]: With dead ends: 542 [2021-10-07 15:44:23,643 INFO L226 Difference]: Without dead ends: 542 [2021-10-07 15:44:23,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 923.6ms TimeCoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 15:44:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-10-07 15:44:23,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 306. [2021-10-07 15:44:23,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.2295081967213113) internal successors, (985), 305 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:23,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 985 transitions. [2021-10-07 15:44:23,652 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 985 transitions. Word has length 18 [2021-10-07 15:44:23,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:23,653 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 985 transitions. [2021-10-07 15:44:23,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:23,653 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 985 transitions. [2021-10-07 15:44:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:44:23,654 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:23,654 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:23,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-10-07 15:44:23,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:23,869 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:23,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:23,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1625316155, now seen corresponding path program 49 times [2021-10-07 15:44:23,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:23,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231401504] [2021-10-07 15:44:23,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:44:23,872 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:23,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:23,873 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:23,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-10-07 15:44:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:44:24,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:44:24,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:24,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:24,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:24,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231401504] [2021-10-07 15:44:24,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231401504] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:24,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:24,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:44:24,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080190444] [2021-10-07 15:44:24,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:44:24,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:24,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:44:24,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:44:24,901 INFO L87 Difference]: Start difference. First operand 306 states and 985 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:26,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:26,103 INFO L93 Difference]: Finished difference Result 524 states and 1479 transitions. [2021-10-07 15:44:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 15:44:26,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:44:26,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:26,107 INFO L225 Difference]: With dead ends: 524 [2021-10-07 15:44:26,107 INFO L226 Difference]: Without dead ends: 524 [2021-10-07 15:44:26,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 862.2ms TimeCoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:44:26,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-10-07 15:44:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 318. [2021-10-07 15:44:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.2586750788643535) internal successors, (1033), 317 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 1033 transitions. [2021-10-07 15:44:26,115 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 1033 transitions. Word has length 18 [2021-10-07 15:44:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:26,115 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 1033 transitions. [2021-10-07 15:44:26,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 1033 transitions. [2021-10-07 15:44:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:44:26,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:26,116 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:26,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-10-07 15:44:26,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:26,317 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:26,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1625910801, now seen corresponding path program 50 times [2021-10-07 15:44:26,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:26,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622121772] [2021-10-07 15:44:26,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:44:26,320 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:26,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:26,321 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:26,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-10-07 15:44:26,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:44:26,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:26,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:44:26,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:27,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:27,376 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:27,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622121772] [2021-10-07 15:44:27,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622121772] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:27,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:27,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:44:27,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321334507] [2021-10-07 15:44:27,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:44:27,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:27,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:44:27,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:44:27,378 INFO L87 Difference]: Start difference. First operand 318 states and 1033 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:29,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:29,202 INFO L93 Difference]: Finished difference Result 502 states and 1443 transitions. [2021-10-07 15:44:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 15:44:29,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:44:29,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:29,206 INFO L225 Difference]: With dead ends: 502 [2021-10-07 15:44:29,206 INFO L226 Difference]: Without dead ends: 496 [2021-10-07 15:44:29,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1398.3ms TimeCoverageRelationStatistics Valid=329, Invalid=1231, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:44:29,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-10-07 15:44:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 318. [2021-10-07 15:44:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.2460567823343847) internal successors, (1029), 317 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 1029 transitions. [2021-10-07 15:44:29,215 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 1029 transitions. Word has length 18 [2021-10-07 15:44:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:29,215 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 1029 transitions. [2021-10-07 15:44:29,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:29,215 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 1029 transitions. [2021-10-07 15:44:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:44:29,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:29,216 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:29,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2021-10-07 15:44:29,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:29,417 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:29,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:29,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1767867264, now seen corresponding path program 51 times [2021-10-07 15:44:29,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:29,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848996077] [2021-10-07 15:44:29,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:44:29,420 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:29,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:29,421 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:29,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-10-07 15:44:30,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:44:30,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:30,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 15:44:30,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:30,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:31,014 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:31,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848996077] [2021-10-07 15:44:31,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848996077] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:31,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:31,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:44:31,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40848764] [2021-10-07 15:44:31,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:44:31,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:31,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:44:31,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:44:31,016 INFO L87 Difference]: Start difference. First operand 318 states and 1029 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:33,812 INFO L93 Difference]: Finished difference Result 580 states and 1640 transitions. [2021-10-07 15:44:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:44:33,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:44:33,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:33,818 INFO L225 Difference]: With dead ends: 580 [2021-10-07 15:44:33,819 INFO L226 Difference]: Without dead ends: 580 [2021-10-07 15:44:33,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2612.0ms TimeCoverageRelationStatistics Valid=344, Invalid=1062, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:44:33,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-10-07 15:44:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 330. [2021-10-07 15:44:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.2674772036474162) internal successors, (1075), 329 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1075 transitions. [2021-10-07 15:44:33,832 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1075 transitions. Word has length 18 [2021-10-07 15:44:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:33,832 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 1075 transitions. [2021-10-07 15:44:33,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1075 transitions. [2021-10-07 15:44:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:44:33,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:33,834 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:33,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-10-07 15:44:34,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:34,048 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1749433238, now seen corresponding path program 52 times [2021-10-07 15:44:34,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:34,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300795254] [2021-10-07 15:44:34,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:44:34,049 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:34,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:34,050 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:34,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-10-07 15:44:34,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:44:34,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:34,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:44:34,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:34,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:35,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:35,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300795254] [2021-10-07 15:44:35,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300795254] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:35,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:35,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:44:35,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11487739] [2021-10-07 15:44:35,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:44:35,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:35,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:44:35,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:44:35,405 INFO L87 Difference]: Start difference. First operand 330 states and 1075 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:40,950 INFO L93 Difference]: Finished difference Result 624 states and 1736 transitions. [2021-10-07 15:44:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:44:40,951 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:44:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:40,955 INFO L225 Difference]: With dead ends: 624 [2021-10-07 15:44:40,955 INFO L226 Difference]: Without dead ends: 624 [2021-10-07 15:44:40,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 5106.0ms TimeCoverageRelationStatistics Valid=399, Invalid=1241, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 15:44:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-10-07 15:44:40,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 336. [2021-10-07 15:44:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.2776119402985073) internal successors, (1098), 335 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1098 transitions. [2021-10-07 15:44:40,971 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1098 transitions. Word has length 18 [2021-10-07 15:44:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:40,972 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1098 transitions. [2021-10-07 15:44:40,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1098 transitions. [2021-10-07 15:44:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:44:40,973 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:40,973 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:40,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2021-10-07 15:44:41,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:41,174 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:41,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:41,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2079167663, now seen corresponding path program 53 times [2021-10-07 15:44:41,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:41,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175265251] [2021-10-07 15:44:41,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:44:41,176 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:41,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:41,178 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:41,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-10-07 15:44:41,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:44:41,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:41,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:44:41,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:41,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:42,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:42,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175265251] [2021-10-07 15:44:42,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175265251] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:42,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:42,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:44:42,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510673170] [2021-10-07 15:44:42,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:44:42,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:44:42,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:44:42,216 INFO L87 Difference]: Start difference. First operand 336 states and 1098 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:43,271 INFO L93 Difference]: Finished difference Result 484 states and 1422 transitions. [2021-10-07 15:44:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:44:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:44:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:43,276 INFO L225 Difference]: With dead ends: 484 [2021-10-07 15:44:43,276 INFO L226 Difference]: Without dead ends: 460 [2021-10-07 15:44:43,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 741.3ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:44:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-10-07 15:44:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 336. [2021-10-07 15:44:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.265671641791045) internal successors, (1094), 335 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1094 transitions. [2021-10-07 15:44:43,286 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1094 transitions. Word has length 18 [2021-10-07 15:44:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:43,287 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1094 transitions. [2021-10-07 15:44:43,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1094 transitions. [2021-10-07 15:44:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:44:43,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:43,288 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:43,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2021-10-07 15:44:43,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:43,489 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:43,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1177978432, now seen corresponding path program 54 times [2021-10-07 15:44:43,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:43,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827952817] [2021-10-07 15:44:43,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:44:43,490 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:43,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:43,491 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:43,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-10-07 15:44:44,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:44:44,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:44,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:44:44,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:44,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:44,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:44,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827952817] [2021-10-07 15:44:44,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827952817] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:44,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:44,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:44:44,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475838374] [2021-10-07 15:44:44,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:44:44,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:44:44,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:44:44,818 INFO L87 Difference]: Start difference. First operand 336 states and 1094 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:50,251 INFO L93 Difference]: Finished difference Result 1092 states and 3032 transitions. [2021-10-07 15:44:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-07 15:44:50,253 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:44:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:50,258 INFO L225 Difference]: With dead ends: 1092 [2021-10-07 15:44:50,259 INFO L226 Difference]: Without dead ends: 1092 [2021-10-07 15:44:50,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 4317.5ms TimeCoverageRelationStatistics Valid=599, Invalid=2481, Unknown=0, NotChecked=0, Total=3080 [2021-10-07 15:44:50,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-10-07 15:44:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 352. [2021-10-07 15:44:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.2877492877492878) internal successors, (1154), 351 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1154 transitions. [2021-10-07 15:44:50,279 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1154 transitions. Word has length 18 [2021-10-07 15:44:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:50,279 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 1154 transitions. [2021-10-07 15:44:50,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1154 transitions. [2021-10-07 15:44:50,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:44:50,280 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:50,280 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:50,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-10-07 15:44:50,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:50,495 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1353629635, now seen corresponding path program 55 times [2021-10-07 15:44:50,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:50,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471035781] [2021-10-07 15:44:50,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:44:50,496 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:50,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:50,498 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:50,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-10-07 15:44:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:44:51,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:44:51,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:51,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:51,716 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:51,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471035781] [2021-10-07 15:44:51,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471035781] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:51,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:51,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:44:51,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118048605] [2021-10-07 15:44:51,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:44:51,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:51,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:44:51,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:44:51,718 INFO L87 Difference]: Start difference. First operand 352 states and 1154 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:54,234 INFO L93 Difference]: Finished difference Result 538 states and 1544 transitions. [2021-10-07 15:44:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-07 15:44:54,235 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:44:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:54,238 INFO L225 Difference]: With dead ends: 538 [2021-10-07 15:44:54,238 INFO L226 Difference]: Without dead ends: 538 [2021-10-07 15:44:54,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1967.8ms TimeCoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 15:44:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-10-07 15:44:54,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 376. [2021-10-07 15:44:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.3333333333333335) internal successors, (1250), 375 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1250 transitions. [2021-10-07 15:44:54,251 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1250 transitions. Word has length 18 [2021-10-07 15:44:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:54,251 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1250 transitions. [2021-10-07 15:44:54,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1250 transitions. [2021-10-07 15:44:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:44:54,252 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:54,252 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:54,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2021-10-07 15:44:54,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:54,453 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:54,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:54,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1906611846, now seen corresponding path program 56 times [2021-10-07 15:44:54,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:54,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240463234] [2021-10-07 15:44:54,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:44:54,455 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:54,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:54,457 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:54,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-10-07 15:44:55,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:44:55,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:55,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:44:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:55,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:55,844 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:55,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240463234] [2021-10-07 15:44:55,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240463234] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:55,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:55,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-07 15:44:55,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979323423] [2021-10-07 15:44:55,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:44:55,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:44:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:44:55,846 INFO L87 Difference]: Start difference. First operand 376 states and 1250 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:57,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:44:57,525 INFO L93 Difference]: Finished difference Result 432 states and 1388 transitions. [2021-10-07 15:44:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:44:57,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:44:57,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:44:57,528 INFO L225 Difference]: With dead ends: 432 [2021-10-07 15:44:57,528 INFO L226 Difference]: Without dead ends: 428 [2021-10-07 15:44:57,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1448.5ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:44:57,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-10-07 15:44:57,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 380. [2021-10-07 15:44:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.3298153034300793) internal successors, (1262), 379 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1262 transitions. [2021-10-07 15:44:57,537 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1262 transitions. Word has length 18 [2021-10-07 15:44:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:44:57,538 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1262 transitions. [2021-10-07 15:44:57,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:44:57,538 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1262 transitions. [2021-10-07 15:44:57,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:44:57,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:44:57,539 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:44:57,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2021-10-07 15:44:57,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:44:57,740 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:44:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:44:57,741 INFO L82 PathProgramCache]: Analyzing trace with hash -678307581, now seen corresponding path program 57 times [2021-10-07 15:44:57,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:44:57,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138563299] [2021-10-07 15:44:57,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:44:57,742 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:44:57,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:44:57,743 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:44:57,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-10-07 15:44:58,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:44:58,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:44:58,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:44:58,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:44:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:58,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:44:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:44:58,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:44:58,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138563299] [2021-10-07 15:44:58,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138563299] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:44:58,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:44:58,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:44:58,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327118892] [2021-10-07 15:44:58,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:44:58,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:44:58,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:44:58,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:44:58,921 INFO L87 Difference]: Start difference. First operand 380 states and 1262 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:00,823 INFO L93 Difference]: Finished difference Result 582 states and 1684 transitions. [2021-10-07 15:45:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:45:00,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:00,826 INFO L225 Difference]: With dead ends: 582 [2021-10-07 15:45:00,826 INFO L226 Difference]: Without dead ends: 582 [2021-10-07 15:45:00,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1388.3ms TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:45:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-10-07 15:45:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 388. [2021-10-07 15:45:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.3488372093023258) internal successors, (1296), 387 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1296 transitions. [2021-10-07 15:45:00,836 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1296 transitions. Word has length 18 [2021-10-07 15:45:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:00,836 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1296 transitions. [2021-10-07 15:45:00,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:00,837 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1296 transitions. [2021-10-07 15:45:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:00,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:00,838 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:00,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-10-07 15:45:01,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:01,039 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash -678902227, now seen corresponding path program 58 times [2021-10-07 15:45:01,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:01,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530926738] [2021-10-07 15:45:01,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:45:01,041 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:01,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:01,042 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:01,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-10-07 15:45:01,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:45:01,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:45:01,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:45:01,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:45:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:01,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:45:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:02,180 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:45:02,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530926738] [2021-10-07 15:45:02,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530926738] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:45:02,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:45:02,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:45:02,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139953661] [2021-10-07 15:45:02,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:45:02,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:45:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:45:02,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:45:02,182 INFO L87 Difference]: Start difference. First operand 388 states and 1296 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:04,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:04,095 INFO L93 Difference]: Finished difference Result 504 states and 1529 transitions. [2021-10-07 15:45:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:45:04,097 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:04,098 INFO L225 Difference]: With dead ends: 504 [2021-10-07 15:45:04,098 INFO L226 Difference]: Without dead ends: 494 [2021-10-07 15:45:04,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1414.3ms TimeCoverageRelationStatistics Valid=237, Invalid=755, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:45:04,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-10-07 15:45:04,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 386. [2021-10-07 15:45:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.3324675324675326) internal successors, (1283), 385 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:04,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1283 transitions. [2021-10-07 15:45:04,113 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1283 transitions. Word has length 18 [2021-10-07 15:45:04,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:04,114 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1283 transitions. [2021-10-07 15:45:04,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1283 transitions. [2021-10-07 15:45:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:04,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:04,115 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:04,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2021-10-07 15:45:04,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:04,316 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:04,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:04,317 INFO L82 PathProgramCache]: Analyzing trace with hash -820858690, now seen corresponding path program 59 times [2021-10-07 15:45:04,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:04,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121673651] [2021-10-07 15:45:04,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:45:04,318 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:04,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:04,319 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:04,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-10-07 15:45:04,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:45:04,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:45:04,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 15:45:04,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:45:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:05,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:45:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:05,721 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:45:05,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121673651] [2021-10-07 15:45:05,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121673651] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:45:05,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:45:05,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:45:05,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318012841] [2021-10-07 15:45:05,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:45:05,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:45:05,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:45:05,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:45:05,723 INFO L87 Difference]: Start difference. First operand 386 states and 1283 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:13,355 INFO L93 Difference]: Finished difference Result 1012 states and 2714 transitions. [2021-10-07 15:45:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-07 15:45:13,357 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:13,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:13,360 INFO L225 Difference]: With dead ends: 1012 [2021-10-07 15:45:13,360 INFO L226 Difference]: Without dead ends: 1012 [2021-10-07 15:45:13,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 6126.9ms TimeCoverageRelationStatistics Valid=810, Invalid=3480, Unknown=0, NotChecked=0, Total=4290 [2021-10-07 15:45:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-10-07 15:45:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 406. [2021-10-07 15:45:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.360493827160494) internal successors, (1361), 405 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1361 transitions. [2021-10-07 15:45:13,382 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1361 transitions. Word has length 18 [2021-10-07 15:45:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:13,382 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1361 transitions. [2021-10-07 15:45:13,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1361 transitions. [2021-10-07 15:45:13,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:13,383 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:13,383 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:13,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2021-10-07 15:45:13,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:13,584 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:13,586 INFO L82 PathProgramCache]: Analyzing trace with hash -106852775, now seen corresponding path program 60 times [2021-10-07 15:45:13,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:13,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895920248] [2021-10-07 15:45:13,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:45:13,587 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:13,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:13,588 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:13,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-10-07 15:45:14,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:45:14,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:45:14,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:45:14,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:45:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:14,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:45:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:14,848 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:45:14,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895920248] [2021-10-07 15:45:14,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895920248] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:45:14,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:45:14,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:45:14,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138499472] [2021-10-07 15:45:14,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:45:14,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:45:14,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:45:14,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:45:14,851 INFO L87 Difference]: Start difference. First operand 406 states and 1361 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:16,872 INFO L93 Difference]: Finished difference Result 596 states and 1737 transitions. [2021-10-07 15:45:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:45:16,874 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:16,876 INFO L225 Difference]: With dead ends: 596 [2021-10-07 15:45:16,876 INFO L226 Difference]: Without dead ends: 596 [2021-10-07 15:45:16,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1517.2ms TimeCoverageRelationStatistics Valid=296, Invalid=1036, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:45:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-10-07 15:45:16,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 410. [2021-10-07 15:45:16,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.3667481662591685) internal successors, (1377), 409 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1377 transitions. [2021-10-07 15:45:16,886 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1377 transitions. Word has length 18 [2021-10-07 15:45:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:16,886 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1377 transitions. [2021-10-07 15:45:16,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:16,887 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1377 transitions. [2021-10-07 15:45:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:16,888 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:16,888 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:16,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-10-07 15:45:17,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:17,092 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:17,092 INFO L82 PathProgramCache]: Analyzing trace with hash -45633444, now seen corresponding path program 61 times [2021-10-07 15:45:17,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:17,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900129896] [2021-10-07 15:45:17,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:45:17,094 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:17,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:17,095 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:17,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2021-10-07 15:45:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:45:17,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:45:17,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:45:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:17,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:45:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:18,267 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:45:18,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900129896] [2021-10-07 15:45:18,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900129896] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:45:18,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:45:18,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:45:18,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075981694] [2021-10-07 15:45:18,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:45:18,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:45:18,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:45:18,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:45:18,269 INFO L87 Difference]: Start difference. First operand 410 states and 1377 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:20,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:20,358 INFO L93 Difference]: Finished difference Result 694 states and 2044 transitions. [2021-10-07 15:45:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 15:45:20,359 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:20,361 INFO L225 Difference]: With dead ends: 694 [2021-10-07 15:45:20,362 INFO L226 Difference]: Without dead ends: 694 [2021-10-07 15:45:20,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1702.0ms TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:45:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-10-07 15:45:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 434. [2021-10-07 15:45:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.3833718244803697) internal successors, (1465), 433 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1465 transitions. [2021-10-07 15:45:20,373 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1465 transitions. Word has length 18 [2021-10-07 15:45:20,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:20,373 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1465 transitions. [2021-10-07 15:45:20,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:20,373 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1465 transitions. [2021-10-07 15:45:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:20,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:20,375 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:20,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2021-10-07 15:45:20,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:20,588 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash -125881447, now seen corresponding path program 62 times [2021-10-07 15:45:20,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:20,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482878895] [2021-10-07 15:45:20,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:45:20,590 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:20,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:20,592 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:20,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2021-10-07 15:45:21,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:45:21,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:45:21,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:45:21,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:45:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:21,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:45:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:22,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:45:22,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482878895] [2021-10-07 15:45:22,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482878895] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:45:22,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:45:22,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:45:22,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958261438] [2021-10-07 15:45:22,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:45:22,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:45:22,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:45:22,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:45:22,139 INFO L87 Difference]: Start difference. First operand 434 states and 1465 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:23,386 INFO L93 Difference]: Finished difference Result 504 states and 1614 transitions. [2021-10-07 15:45:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:45:23,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:23,389 INFO L225 Difference]: With dead ends: 504 [2021-10-07 15:45:23,389 INFO L226 Difference]: Without dead ends: 488 [2021-10-07 15:45:23,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1038.8ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-10-07 15:45:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-10-07 15:45:23,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 434. [2021-10-07 15:45:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.3741339491916857) internal successors, (1461), 433 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1461 transitions. [2021-10-07 15:45:23,401 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1461 transitions. Word has length 18 [2021-10-07 15:45:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:23,401 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1461 transitions. [2021-10-07 15:45:23,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1461 transitions. [2021-10-07 15:45:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:23,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:23,403 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:23,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2021-10-07 15:45:23,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:23,604 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:23,604 INFO L82 PathProgramCache]: Analyzing trace with hash -230969858, now seen corresponding path program 63 times [2021-10-07 15:45:23,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:23,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559649724] [2021-10-07 15:45:23,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:45:23,606 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:23,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:23,607 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:23,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-10-07 15:45:24,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:45:24,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:45:24,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 15:45:24,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:45:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:24,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:45:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:25,191 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:45:25,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559649724] [2021-10-07 15:45:25,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559649724] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:45:25,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:45:25,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:45:25,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980674565] [2021-10-07 15:45:25,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:45:25,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:45:25,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:45:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:45:25,193 INFO L87 Difference]: Start difference. First operand 434 states and 1461 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:33,388 INFO L93 Difference]: Finished difference Result 968 states and 2807 transitions. [2021-10-07 15:45:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-10-07 15:45:33,390 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:33,392 INFO L225 Difference]: With dead ends: 968 [2021-10-07 15:45:33,392 INFO L226 Difference]: Without dead ends: 968 [2021-10-07 15:45:33,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 7286.9ms TimeCoverageRelationStatistics Valid=765, Invalid=3017, Unknown=0, NotChecked=0, Total=3782 [2021-10-07 15:45:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-10-07 15:45:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 446. [2021-10-07 15:45:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.391011235955056) internal successors, (1509), 445 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:33,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1509 transitions. [2021-10-07 15:45:33,406 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1509 transitions. Word has length 18 [2021-10-07 15:45:33,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:33,407 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 1509 transitions. [2021-10-07 15:45:33,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:33,407 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1509 transitions. [2021-10-07 15:45:33,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:33,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:33,408 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:33,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2021-10-07 15:45:33,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:33,610 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:33,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:33,611 INFO L82 PathProgramCache]: Analyzing trace with hash 428377027, now seen corresponding path program 64 times [2021-10-07 15:45:33,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:33,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082464566] [2021-10-07 15:45:33,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:45:33,612 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:33,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:33,614 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:33,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2021-10-07 15:45:34,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:45:34,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:45:34,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:45:34,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:45:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:34,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:45:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:34,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:45:34,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082464566] [2021-10-07 15:45:34,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082464566] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:45:34,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:45:34,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:45:34,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285284824] [2021-10-07 15:45:34,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:45:34,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:45:34,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:45:34,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:45:34,906 INFO L87 Difference]: Start difference. First operand 446 states and 1509 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:36,879 INFO L93 Difference]: Finished difference Result 670 states and 1995 transitions. [2021-10-07 15:45:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-07 15:45:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:36,882 INFO L225 Difference]: With dead ends: 670 [2021-10-07 15:45:36,882 INFO L226 Difference]: Without dead ends: 670 [2021-10-07 15:45:36,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1503.7ms TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:45:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-10-07 15:45:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 462. [2021-10-07 15:45:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.420824295010846) internal successors, (1577), 461 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1577 transitions. [2021-10-07 15:45:36,897 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1577 transitions. Word has length 18 [2021-10-07 15:45:36,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:36,898 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1577 transitions. [2021-10-07 15:45:36,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1577 transitions. [2021-10-07 15:45:36,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:36,899 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:36,899 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:36,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2021-10-07 15:45:37,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:37,100 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:37,101 INFO L82 PathProgramCache]: Analyzing trace with hash 427782381, now seen corresponding path program 65 times [2021-10-07 15:45:37,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:37,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914044265] [2021-10-07 15:45:37,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:45:37,102 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:37,104 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:37,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2021-10-07 15:45:37,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:45:37,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:45:37,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:45:37,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:45:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:38,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:45:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:38,342 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:45:38,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914044265] [2021-10-07 15:45:38,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914044265] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:45:38,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:45:38,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:45:38,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173274362] [2021-10-07 15:45:38,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:45:38,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:45:38,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:45:38,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:45:38,344 INFO L87 Difference]: Start difference. First operand 462 states and 1577 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:41,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:41,047 INFO L93 Difference]: Finished difference Result 698 states and 2115 transitions. [2021-10-07 15:45:41,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:45:41,048 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:41,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:41,050 INFO L225 Difference]: With dead ends: 698 [2021-10-07 15:45:41,050 INFO L226 Difference]: Without dead ends: 692 [2021-10-07 15:45:41,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1791.0ms TimeCoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:45:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-10-07 15:45:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 484. [2021-10-07 15:45:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.440993788819876) internal successors, (1662), 483 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1662 transitions. [2021-10-07 15:45:41,069 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1662 transitions. Word has length 18 [2021-10-07 15:45:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:41,070 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1662 transitions. [2021-10-07 15:45:41,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:41,070 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1662 transitions. [2021-10-07 15:45:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:41,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:41,071 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:41,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (84)] Ended with exit code 0 [2021-10-07 15:45:41,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:41,272 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:41,273 INFO L82 PathProgramCache]: Analyzing trace with hash 285825918, now seen corresponding path program 66 times [2021-10-07 15:45:41,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:41,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410053899] [2021-10-07 15:45:41,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:45:41,274 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:41,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:41,276 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:41,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2021-10-07 15:45:42,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:45:42,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:45:42,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:45:42,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:45:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:42,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:45:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:42,862 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:45:42,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410053899] [2021-10-07 15:45:42,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410053899] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:45:42,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:45:42,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:45:42,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629651152] [2021-10-07 15:45:42,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:45:42,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:45:42,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:45:42,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:45:42,863 INFO L87 Difference]: Start difference. First operand 484 states and 1662 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:46,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:46,464 INFO L93 Difference]: Finished difference Result 674 states and 2096 transitions. [2021-10-07 15:45:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:45:46,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:46,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:46,468 INFO L225 Difference]: With dead ends: 674 [2021-10-07 15:45:46,468 INFO L226 Difference]: Without dead ends: 674 [2021-10-07 15:45:46,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 2858.4ms TimeCoverageRelationStatistics Valid=336, Invalid=1070, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:45:46,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-10-07 15:45:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 500. [2021-10-07 15:45:46,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.44689378757515) internal successors, (1720), 499 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1720 transitions. [2021-10-07 15:45:46,482 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1720 transitions. Word has length 18 [2021-10-07 15:45:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:46,483 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1720 transitions. [2021-10-07 15:45:46,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1720 transitions. [2021-10-07 15:45:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:46,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:46,484 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:46,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2021-10-07 15:45:46,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:46,685 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash 508030384, now seen corresponding path program 67 times [2021-10-07 15:45:46,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:46,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379512730] [2021-10-07 15:45:46,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:45:46,687 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:46,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:46,688 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:46,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2021-10-07 15:45:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:45:47,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:45:47,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:45:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:47,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:45:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:47,910 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:45:47,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379512730] [2021-10-07 15:45:47,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379512730] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:45:47,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:45:47,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:45:47,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394385550] [2021-10-07 15:45:47,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:45:47,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:45:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:45:47,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:45:47,911 INFO L87 Difference]: Start difference. First operand 500 states and 1720 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:50,069 INFO L93 Difference]: Finished difference Result 676 states and 2113 transitions. [2021-10-07 15:45:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:45:50,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:50,072 INFO L225 Difference]: With dead ends: 676 [2021-10-07 15:45:50,072 INFO L226 Difference]: Without dead ends: 676 [2021-10-07 15:45:50,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1779.0ms TimeCoverageRelationStatistics Valid=376, Invalid=1106, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 15:45:50,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-10-07 15:45:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 502. [2021-10-07 15:45:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.435129740518962) internal successors, (1721), 501 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1721 transitions. [2021-10-07 15:45:50,087 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1721 transitions. Word has length 18 [2021-10-07 15:45:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:50,087 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1721 transitions. [2021-10-07 15:45:50,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1721 transitions. [2021-10-07 15:45:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:50,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:50,089 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:50,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2021-10-07 15:45:50,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:50,305 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:50,306 INFO L82 PathProgramCache]: Analyzing trace with hash -162106451, now seen corresponding path program 68 times [2021-10-07 15:45:50,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:50,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470542055] [2021-10-07 15:45:50,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:45:50,306 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:50,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:50,308 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:50,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2021-10-07 15:45:51,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:45:51,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:45:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:45:51,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:45:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:51,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:45:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:51,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:45:51,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470542055] [2021-10-07 15:45:51,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470542055] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:45:51,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:45:51,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:45:51,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81956152] [2021-10-07 15:45:51,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:45:51,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:45:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:45:51,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:45:51,615 INFO L87 Difference]: Start difference. First operand 502 states and 1721 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:52,610 INFO L93 Difference]: Finished difference Result 582 states and 1878 transitions. [2021-10-07 15:45:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:45:52,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:52,614 INFO L225 Difference]: With dead ends: 582 [2021-10-07 15:45:52,614 INFO L226 Difference]: Without dead ends: 558 [2021-10-07 15:45:52,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 786.3ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:45:52,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-10-07 15:45:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 510. [2021-10-07 15:45:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 3.400785854616896) internal successors, (1731), 509 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1731 transitions. [2021-10-07 15:45:52,630 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1731 transitions. Word has length 18 [2021-10-07 15:45:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:52,630 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 1731 transitions. [2021-10-07 15:45:52,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1731 transitions. [2021-10-07 15:45:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:52,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:52,632 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:52,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (87)] Ended with exit code 0 [2021-10-07 15:45:52,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:52,845 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:52,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:52,846 INFO L82 PathProgramCache]: Analyzing trace with hash 875714750, now seen corresponding path program 69 times [2021-10-07 15:45:52,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:52,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053448093] [2021-10-07 15:45:52,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:45:52,847 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:52,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:52,848 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:52,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2021-10-07 15:45:53,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:45:53,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:45:53,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:45:53,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:45:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:53,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:45:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:45:54,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:45:54,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053448093] [2021-10-07 15:45:54,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053448093] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:45:54,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:45:54,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:45:54,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817191683] [2021-10-07 15:45:54,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:45:54,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:45:54,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:45:54,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:45:54,471 INFO L87 Difference]: Start difference. First operand 510 states and 1731 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:59,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:45:59,328 INFO L93 Difference]: Finished difference Result 742 states and 2260 transitions. [2021-10-07 15:45:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 15:45:59,330 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:45:59,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:45:59,332 INFO L225 Difference]: With dead ends: 742 [2021-10-07 15:45:59,333 INFO L226 Difference]: Without dead ends: 742 [2021-10-07 15:45:59,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 4006.9ms TimeCoverageRelationStatistics Valid=399, Invalid=1161, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:45:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-10-07 15:45:59,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 522. [2021-10-07 15:45:59,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.4030710172744723) internal successors, (1773), 521 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:59,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1773 transitions. [2021-10-07 15:45:59,345 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1773 transitions. Word has length 18 [2021-10-07 15:45:59,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:45:59,345 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1773 transitions. [2021-10-07 15:45:59,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:45:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1773 transitions. [2021-10-07 15:45:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:45:59,346 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:45:59,346 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:45:59,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2021-10-07 15:45:59,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:45:59,547 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:45:59,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:45:59,549 INFO L82 PathProgramCache]: Analyzing trace with hash 751768845, now seen corresponding path program 70 times [2021-10-07 15:45:59,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:45:59,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479946660] [2021-10-07 15:45:59,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:45:59,550 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:45:59,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:45:59,551 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:45:59,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2021-10-07 15:46:00,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:46:00,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:46:00,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:46:00,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:46:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:00,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:46:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:00,938 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:46:00,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479946660] [2021-10-07 15:46:00,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479946660] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:46:00,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:46:00,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:46:00,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123329612] [2021-10-07 15:46:00,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:46:00,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:46:00,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:46:00,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:46:00,941 INFO L87 Difference]: Start difference. First operand 522 states and 1773 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:46:04,787 INFO L93 Difference]: Finished difference Result 680 states and 2101 transitions. [2021-10-07 15:46:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-07 15:46:04,788 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:46:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:46:04,790 INFO L225 Difference]: With dead ends: 680 [2021-10-07 15:46:04,790 INFO L226 Difference]: Without dead ends: 680 [2021-10-07 15:46:04,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2882.7ms TimeCoverageRelationStatistics Valid=362, Invalid=1198, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:46:04,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-10-07 15:46:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 534. [2021-10-07 15:46:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.4165103189493435) internal successors, (1821), 533 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1821 transitions. [2021-10-07 15:46:04,802 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1821 transitions. Word has length 18 [2021-10-07 15:46:04,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:46:04,802 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1821 transitions. [2021-10-07 15:46:04,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1821 transitions. [2021-10-07 15:46:04,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:46:04,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:46:04,803 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:46:04,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (89)] Ended with exit code 0 [2021-10-07 15:46:05,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:46:05,004 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:46:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:46:05,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1259960348, now seen corresponding path program 71 times [2021-10-07 15:46:05,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:46:05,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573512425] [2021-10-07 15:46:05,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:46:05,006 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:46:05,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:46:05,008 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:46:05,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2021-10-07 15:46:05,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:46:05,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:46:05,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:46:05,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:46:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:05,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:46:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:06,653 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:46:06,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573512425] [2021-10-07 15:46:06,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573512425] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:46:06,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:46:06,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:46:06,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696508005] [2021-10-07 15:46:06,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:46:06,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:46:06,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:46:06,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:46:06,656 INFO L87 Difference]: Start difference. First operand 534 states and 1821 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:14,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:46:14,340 INFO L93 Difference]: Finished difference Result 748 states and 2395 transitions. [2021-10-07 15:46:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:46:14,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:46:14,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:46:14,345 INFO L225 Difference]: With dead ends: 748 [2021-10-07 15:46:14,346 INFO L226 Difference]: Without dead ends: 732 [2021-10-07 15:46:14,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4451.6ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:46:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-10-07 15:46:14,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 620. [2021-10-07 15:46:14,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.4733441033925687) internal successors, (2150), 619 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2150 transitions. [2021-10-07 15:46:14,365 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2150 transitions. Word has length 18 [2021-10-07 15:46:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:46:14,365 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 2150 transitions. [2021-10-07 15:46:14,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2150 transitions. [2021-10-07 15:46:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:46:14,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:46:14,368 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:46:14,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (90)] Ended with exit code 0 [2021-10-07 15:46:14,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:46:14,582 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:46:14,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:46:14,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2061134913, now seen corresponding path program 72 times [2021-10-07 15:46:14,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:46:14,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990503442] [2021-10-07 15:46:14,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:46:14,584 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:46:14,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:46:14,585 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:46:14,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2021-10-07 15:46:15,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:46:15,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:46:15,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:46:15,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:46:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:15,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:46:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:16,075 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:46:16,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990503442] [2021-10-07 15:46:16,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990503442] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:46:16,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:46:16,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:46:16,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134372757] [2021-10-07 15:46:16,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:46:16,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:46:16,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:46:16,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:46:16,077 INFO L87 Difference]: Start difference. First operand 620 states and 2150 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:21,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:46:21,649 INFO L93 Difference]: Finished difference Result 1022 states and 3068 transitions. [2021-10-07 15:46:21,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-07 15:46:21,651 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:46:21,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:46:21,653 INFO L225 Difference]: With dead ends: 1022 [2021-10-07 15:46:21,653 INFO L226 Difference]: Without dead ends: 1022 [2021-10-07 15:46:21,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 3997.6ms TimeCoverageRelationStatistics Valid=506, Invalid=1846, Unknown=0, NotChecked=0, Total=2352 [2021-10-07 15:46:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-10-07 15:46:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 690. [2021-10-07 15:46:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 3.516690856313498) internal successors, (2423), 689 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2423 transitions. [2021-10-07 15:46:21,668 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2423 transitions. Word has length 18 [2021-10-07 15:46:21,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:46:21,669 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 2423 transitions. [2021-10-07 15:46:21,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2423 transitions. [2021-10-07 15:46:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:46:21,670 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:46:21,670 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:46:21,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2021-10-07 15:46:21,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:46:21,871 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:46:21,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:46:21,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1199106568, now seen corresponding path program 73 times [2021-10-07 15:46:21,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:46:21,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458727711] [2021-10-07 15:46:21,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:46:21,873 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:46:21,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:46:21,875 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:46:21,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2021-10-07 15:46:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:46:22,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:46:22,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:46:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:22,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:46:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:23,196 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:46:23,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458727711] [2021-10-07 15:46:23,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458727711] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:46:23,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:46:23,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:46:23,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844697298] [2021-10-07 15:46:23,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:46:23,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:46:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:46:23,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:46:23,198 INFO L87 Difference]: Start difference. First operand 690 states and 2423 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:46:25,249 INFO L93 Difference]: Finished difference Result 830 states and 2745 transitions. [2021-10-07 15:46:25,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 15:46:25,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:46:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:46:25,253 INFO L225 Difference]: With dead ends: 830 [2021-10-07 15:46:25,253 INFO L226 Difference]: Without dead ends: 824 [2021-10-07 15:46:25,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1412.1ms TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:46:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-10-07 15:46:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 702. [2021-10-07 15:46:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.5306704707560628) internal successors, (2475), 701 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2475 transitions. [2021-10-07 15:46:25,268 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2475 transitions. Word has length 18 [2021-10-07 15:46:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:46:25,268 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 2475 transitions. [2021-10-07 15:46:25,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2475 transitions. [2021-10-07 15:46:25,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:46:25,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:46:25,270 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:46:25,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2021-10-07 15:46:25,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:46:25,471 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:46:25,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:46:25,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1385812859, now seen corresponding path program 74 times [2021-10-07 15:46:25,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:46:25,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394208695] [2021-10-07 15:46:25,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:46:25,473 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:46:25,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:46:25,474 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:46:25,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2021-10-07 15:46:26,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:46:26,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:46:26,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:46:26,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:46:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:26,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:46:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:26,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:46:26,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394208695] [2021-10-07 15:46:26,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394208695] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:46:26,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:46:26,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-07 15:46:26,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128796324] [2021-10-07 15:46:26,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:46:26,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:46:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:46:26,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:46:26,920 INFO L87 Difference]: Start difference. First operand 702 states and 2475 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:34,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:46:34,278 INFO L93 Difference]: Finished difference Result 984 states and 3112 transitions. [2021-10-07 15:46:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 15:46:34,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:46:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:46:34,280 INFO L225 Difference]: With dead ends: 984 [2021-10-07 15:46:34,280 INFO L226 Difference]: Without dead ends: 984 [2021-10-07 15:46:34,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 6045.4ms TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 15:46:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-10-07 15:46:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 720. [2021-10-07 15:46:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 3.5521557719054244) internal successors, (2554), 719 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:34,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2554 transitions. [2021-10-07 15:46:34,294 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2554 transitions. Word has length 18 [2021-10-07 15:46:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:46:34,295 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 2554 transitions. [2021-10-07 15:46:34,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2554 transitions. [2021-10-07 15:46:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:46:34,296 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:46:34,296 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:46:34,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2021-10-07 15:46:34,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:46:34,497 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:46:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:46:34,498 INFO L82 PathProgramCache]: Analyzing trace with hash 2109715300, now seen corresponding path program 75 times [2021-10-07 15:46:34,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:46:34,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000640589] [2021-10-07 15:46:34,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:46:34,499 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:46:34,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:46:34,501 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:46:34,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2021-10-07 15:46:35,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:46:35,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:46:35,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:46:35,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:46:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:35,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:46:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:35,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:46:35,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000640589] [2021-10-07 15:46:35,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000640589] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:46:35,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:46:35,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:46:35,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591500675] [2021-10-07 15:46:35,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:46:35,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:46:35,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:46:35,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:46:35,967 INFO L87 Difference]: Start difference. First operand 720 states and 2554 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:46:38,823 INFO L93 Difference]: Finished difference Result 958 states and 3088 transitions. [2021-10-07 15:46:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 15:46:38,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:46:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:46:38,826 INFO L225 Difference]: With dead ends: 958 [2021-10-07 15:46:38,826 INFO L226 Difference]: Without dead ends: 950 [2021-10-07 15:46:38,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2175.5ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:46:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-10-07 15:46:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 736. [2021-10-07 15:46:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.5619047619047617) internal successors, (2618), 735 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2618 transitions. [2021-10-07 15:46:38,841 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2618 transitions. Word has length 18 [2021-10-07 15:46:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:46:38,842 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2618 transitions. [2021-10-07 15:46:38,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2618 transitions. [2021-10-07 15:46:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:46:38,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:46:38,844 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:46:38,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (94)] Ended with exit code 0 [2021-10-07 15:46:39,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:46:39,059 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:46:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:46:39,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1525905111, now seen corresponding path program 76 times [2021-10-07 15:46:39,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:46:39,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16706443] [2021-10-07 15:46:39,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:46:39,061 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:46:39,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:46:39,063 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:46:39,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2021-10-07 15:46:39,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:46:39,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:46:39,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:46:39,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:46:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:40,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:46:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:40,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:46:40,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16706443] [2021-10-07 15:46:40,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16706443] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:46:40,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:46:40,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:46:40,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908088290] [2021-10-07 15:46:40,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:46:40,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:46:40,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:46:40,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:46:40,532 INFO L87 Difference]: Start difference. First operand 736 states and 2618 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:46:46,231 INFO L93 Difference]: Finished difference Result 1000 states and 3175 transitions. [2021-10-07 15:46:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 15:46:46,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:46:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:46:46,236 INFO L225 Difference]: With dead ends: 1000 [2021-10-07 15:46:46,236 INFO L226 Difference]: Without dead ends: 990 [2021-10-07 15:46:46,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 3890.4ms TimeCoverageRelationStatistics Valid=393, Invalid=1413, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 15:46:46,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-10-07 15:46:46,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 754. [2021-10-07 15:46:46,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.5710491367861885) internal successors, (2689), 753 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2689 transitions. [2021-10-07 15:46:46,252 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2689 transitions. Word has length 18 [2021-10-07 15:46:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:46:46,252 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2689 transitions. [2021-10-07 15:46:46,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:46,253 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2689 transitions. [2021-10-07 15:46:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:46:46,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:46:46,254 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:46:46,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (95)] Ended with exit code 0 [2021-10-07 15:46:46,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:46:46,455 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:46:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:46:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash -850583057, now seen corresponding path program 77 times [2021-10-07 15:46:46,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:46:46,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204694748] [2021-10-07 15:46:46,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:46:46,457 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:46:46,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:46:46,458 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:46:46,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2021-10-07 15:46:47,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:46:47,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:46:47,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:46:47,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:46:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:47,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:46:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:48,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:46:48,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204694748] [2021-10-07 15:46:48,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204694748] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:46:48,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:46:48,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:46:48,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645903830] [2021-10-07 15:46:48,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:46:48,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:46:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:46:48,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:46:48,050 INFO L87 Difference]: Start difference. First operand 754 states and 2689 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:46:49,879 INFO L93 Difference]: Finished difference Result 970 states and 3215 transitions. [2021-10-07 15:46:49,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:46:49,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:46:49,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:46:49,882 INFO L225 Difference]: With dead ends: 970 [2021-10-07 15:46:49,882 INFO L226 Difference]: Without dead ends: 962 [2021-10-07 15:46:49,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1667.7ms TimeCoverageRelationStatistics Valid=236, Invalid=634, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:46:49,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-10-07 15:46:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 788. [2021-10-07 15:46:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.5603557814485387) internal successors, (2802), 787 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2802 transitions. [2021-10-07 15:46:49,897 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2802 transitions. Word has length 18 [2021-10-07 15:46:49,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:46:49,898 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2802 transitions. [2021-10-07 15:46:49,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2802 transitions. [2021-10-07 15:46:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:46:49,900 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:46:49,900 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:46:49,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2021-10-07 15:46:50,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:46:50,101 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:46:50,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:46:50,101 INFO L82 PathProgramCache]: Analyzing trace with hash -993134166, now seen corresponding path program 78 times [2021-10-07 15:46:50,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:46:50,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766481794] [2021-10-07 15:46:50,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:46:50,102 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:46:50,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:46:50,103 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:46:50,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2021-10-07 15:46:50,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:46:50,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:46:50,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:46:50,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:46:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:51,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:46:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:51,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:46:51,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766481794] [2021-10-07 15:46:51,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766481794] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:46:51,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:46:51,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:46:51,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667599925] [2021-10-07 15:46:51,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:46:51,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:46:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:46:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:46:51,559 INFO L87 Difference]: Start difference. First operand 788 states and 2802 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:46:54,067 INFO L93 Difference]: Finished difference Result 1072 states and 3435 transitions. [2021-10-07 15:46:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 15:46:54,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:46:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:46:54,071 INFO L225 Difference]: With dead ends: 1072 [2021-10-07 15:46:54,071 INFO L226 Difference]: Without dead ends: 1072 [2021-10-07 15:46:54,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2112.0ms TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:46:54,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-10-07 15:46:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 804. [2021-10-07 15:46:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.569115815691158) internal successors, (2866), 803 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2866 transitions. [2021-10-07 15:46:54,088 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2866 transitions. Word has length 18 [2021-10-07 15:46:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:46:54,089 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2866 transitions. [2021-10-07 15:46:54,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2866 transitions. [2021-10-07 15:46:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:46:54,091 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:46:54,091 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:46:54,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2021-10-07 15:46:54,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:46:54,308 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:46:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:46:54,309 INFO L82 PathProgramCache]: Analyzing trace with hash -279128251, now seen corresponding path program 79 times [2021-10-07 15:46:54,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:46:54,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953248596] [2021-10-07 15:46:54,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:46:54,310 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:46:54,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:46:54,311 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:46:54,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2021-10-07 15:46:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:46:55,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:46:55,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:46:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:55,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:46:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:55,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:46:55,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953248596] [2021-10-07 15:46:55,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953248596] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:46:55,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:46:55,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:46:55,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279388819] [2021-10-07 15:46:55,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:46:55,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:46:55,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:46:55,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:46:55,752 INFO L87 Difference]: Start difference. First operand 804 states and 2866 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:57,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:46:57,222 INFO L93 Difference]: Finished difference Result 1014 states and 3372 transitions. [2021-10-07 15:46:57,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 15:46:57,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:46:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:46:57,226 INFO L225 Difference]: With dead ends: 1014 [2021-10-07 15:46:57,226 INFO L226 Difference]: Without dead ends: 1014 [2021-10-07 15:46:57,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1127.8ms TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:46:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-10-07 15:46:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 824. [2021-10-07 15:46:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 3.5820170109356013) internal successors, (2948), 823 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2948 transitions. [2021-10-07 15:46:57,243 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2948 transitions. Word has length 18 [2021-10-07 15:46:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:46:57,243 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 2948 transitions. [2021-10-07 15:46:57,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:46:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2948 transitions. [2021-10-07 15:46:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:46:57,245 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:46:57,245 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:46:57,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2021-10-07 15:46:57,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:46:57,446 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:46:57,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:46:57,447 INFO L82 PathProgramCache]: Analyzing trace with hash -279722897, now seen corresponding path program 80 times [2021-10-07 15:46:57,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:46:57,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120341881] [2021-10-07 15:46:57,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:46:57,448 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:46:57,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:46:57,449 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:46:57,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2021-10-07 15:46:58,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:46:58,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:46:58,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:46:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:46:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:58,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:46:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:46:59,055 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:46:59,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120341881] [2021-10-07 15:46:59,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120341881] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:46:59,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:46:59,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-07 15:46:59,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943300595] [2021-10-07 15:46:59,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:46:59,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:46:59,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:46:59,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:46:59,057 INFO L87 Difference]: Start difference. First operand 824 states and 2948 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:02,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:47:02,996 INFO L93 Difference]: Finished difference Result 1016 states and 3390 transitions. [2021-10-07 15:47:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-07 15:47:02,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:47:02,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:47:03,000 INFO L225 Difference]: With dead ends: 1016 [2021-10-07 15:47:03,000 INFO L226 Difference]: Without dead ends: 1010 [2021-10-07 15:47:03,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2981.8ms TimeCoverageRelationStatistics Valid=291, Invalid=1191, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 15:47:03,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-10-07 15:47:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 826. [2021-10-07 15:47:03,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.5793939393939396) internal successors, (2953), 825 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2953 transitions. [2021-10-07 15:47:03,018 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2953 transitions. Word has length 18 [2021-10-07 15:47:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:47:03,018 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 2953 transitions. [2021-10-07 15:47:03,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2953 transitions. [2021-10-07 15:47:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:47:03,020 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:47:03,020 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:47:03,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (99)] Ended with exit code 0 [2021-10-07 15:47:03,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:47:03,221 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:47:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:47:03,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2113650433, now seen corresponding path program 81 times [2021-10-07 15:47:03,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:47:03,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229684228] [2021-10-07 15:47:03,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:47:03,223 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:47:03,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:47:03,224 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:47:03,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2021-10-07 15:47:04,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:47:04,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:47:04,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:47:04,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:47:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:04,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:47:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:04,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:47:04,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229684228] [2021-10-07 15:47:04,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229684228] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:47:04,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:47:04,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:47:04,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736835770] [2021-10-07 15:47:04,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:47:04,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:47:04,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:47:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:47:04,774 INFO L87 Difference]: Start difference. First operand 826 states and 2953 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:47:06,985 INFO L93 Difference]: Finished difference Result 942 states and 3230 transitions. [2021-10-07 15:47:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:47:06,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:47:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:47:06,989 INFO L225 Difference]: With dead ends: 942 [2021-10-07 15:47:06,989 INFO L226 Difference]: Without dead ends: 942 [2021-10-07 15:47:06,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1842.3ms TimeCoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:47:06,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-10-07 15:47:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 836. [2021-10-07 15:47:07,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.583233532934132) internal successors, (2992), 835 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2992 transitions. [2021-10-07 15:47:07,006 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2992 transitions. Word has length 18 [2021-10-07 15:47:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:47:07,006 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 2992 transitions. [2021-10-07 15:47:07,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2992 transitions. [2021-10-07 15:47:07,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:47:07,009 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:47:07,009 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:47:07,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2021-10-07 15:47:07,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:47:07,210 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:47:07,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:47:07,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1146591048, now seen corresponding path program 82 times [2021-10-07 15:47:07,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:47:07,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045570984] [2021-10-07 15:47:07,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:47:07,212 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:47:07,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:47:07,214 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:47:07,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2021-10-07 15:47:08,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:47:08,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:47:08,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:47:08,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:47:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:08,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:47:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:08,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:47:08,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045570984] [2021-10-07 15:47:08,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045570984] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:47:08,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:47:08,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:47:08,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001125095] [2021-10-07 15:47:08,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:47:08,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:47:08,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:47:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:47:08,689 INFO L87 Difference]: Start difference. First operand 836 states and 2992 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:47:11,411 INFO L93 Difference]: Finished difference Result 958 states and 3246 transitions. [2021-10-07 15:47:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:47:11,412 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:47:11,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:47:11,424 INFO L225 Difference]: With dead ends: 958 [2021-10-07 15:47:11,424 INFO L226 Difference]: Without dead ends: 952 [2021-10-07 15:47:11,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1829.4ms TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:47:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-10-07 15:47:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 844. [2021-10-07 15:47:11,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.5848161328588373) internal successors, (3022), 843 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:11,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 3022 transitions. [2021-10-07 15:47:11,443 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 3022 transitions. Word has length 18 [2021-10-07 15:47:11,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:47:11,444 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 3022 transitions. [2021-10-07 15:47:11,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:11,444 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 3022 transitions. [2021-10-07 15:47:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:47:11,446 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:47:11,446 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:47:11,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (101)] Ended with exit code 0 [2021-10-07 15:47:11,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:47:11,647 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:47:11,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:47:11,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1438328379, now seen corresponding path program 83 times [2021-10-07 15:47:11,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:47:11,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667711648] [2021-10-07 15:47:11,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:47:11,649 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:47:11,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:47:11,650 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:47:11,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2021-10-07 15:47:12,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:47:12,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:47:12,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:47:12,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:47:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:12,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:47:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:13,607 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:47:13,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667711648] [2021-10-07 15:47:13,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667711648] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:47:13,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:47:13,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:47:13,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190954646] [2021-10-07 15:47:13,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:47:13,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:47:13,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:47:13,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:47:13,609 INFO L87 Difference]: Start difference. First operand 844 states and 3022 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:47:15,119 INFO L93 Difference]: Finished difference Result 1036 states and 3495 transitions. [2021-10-07 15:47:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:47:15,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:47:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:47:15,123 INFO L225 Difference]: With dead ends: 1036 [2021-10-07 15:47:15,123 INFO L226 Difference]: Without dead ends: 1032 [2021-10-07 15:47:15,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1470.8ms TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:47:15,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-10-07 15:47:15,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 858. [2021-10-07 15:47:15,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.585764294049008) internal successors, (3073), 857 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3073 transitions. [2021-10-07 15:47:15,145 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3073 transitions. Word has length 18 [2021-10-07 15:47:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:47:15,145 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 3073 transitions. [2021-10-07 15:47:15,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3073 transitions. [2021-10-07 15:47:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:47:15,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:47:15,148 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:47:15,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2021-10-07 15:47:15,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:47:15,362 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:47:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:47:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1438923025, now seen corresponding path program 84 times [2021-10-07 15:47:15,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:47:15,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906562803] [2021-10-07 15:47:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:47:15,363 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:47:15,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:47:15,365 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:47:15,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2021-10-07 15:47:16,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:47:16,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:47:16,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:47:16,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:47:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:16,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:47:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:16,851 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:47:16,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906562803] [2021-10-07 15:47:16,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906562803] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:47:16,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:47:16,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:47:16,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340337084] [2021-10-07 15:47:16,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:47:16,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:47:16,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:47:16,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:47:16,853 INFO L87 Difference]: Start difference. First operand 858 states and 3073 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:47:19,764 INFO L93 Difference]: Finished difference Result 1010 states and 3437 transitions. [2021-10-07 15:47:19,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:47:19,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:47:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:47:19,768 INFO L225 Difference]: With dead ends: 1010 [2021-10-07 15:47:19,768 INFO L226 Difference]: Without dead ends: 1002 [2021-10-07 15:47:19,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1790.1ms TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:47:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-10-07 15:47:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 858. [2021-10-07 15:47:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.5810968494749127) internal successors, (3069), 857 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3069 transitions. [2021-10-07 15:47:19,796 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3069 transitions. Word has length 18 [2021-10-07 15:47:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:47:19,796 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 3069 transitions. [2021-10-07 15:47:19,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:19,797 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3069 transitions. [2021-10-07 15:47:19,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:47:19,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:47:19,798 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:47:19,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2021-10-07 15:47:19,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:47:19,999 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:47:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:47:20,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1580879488, now seen corresponding path program 85 times [2021-10-07 15:47:20,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:47:20,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045645377] [2021-10-07 15:47:20,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:47:20,001 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:47:20,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:47:20,003 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:47:20,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2021-10-07 15:47:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:47:20,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:47:20,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:47:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:21,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:47:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:21,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:47:21,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045645377] [2021-10-07 15:47:21,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045645377] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:47:21,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:47:21,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:47:21,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582733850] [2021-10-07 15:47:21,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:47:21,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:47:21,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:47:21,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:47:21,712 INFO L87 Difference]: Start difference. First operand 858 states and 3069 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:28,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:47:28,045 INFO L93 Difference]: Finished difference Result 1182 states and 3792 transitions. [2021-10-07 15:47:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-07 15:47:28,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:47:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:47:28,049 INFO L225 Difference]: With dead ends: 1182 [2021-10-07 15:47:28,050 INFO L226 Difference]: Without dead ends: 1182 [2021-10-07 15:47:28,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 4760.8ms TimeCoverageRelationStatistics Valid=426, Invalid=1380, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 15:47:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-10-07 15:47:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 888. [2021-10-07 15:47:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.5963923337091317) internal successors, (3190), 887 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3190 transitions. [2021-10-07 15:47:28,079 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3190 transitions. Word has length 18 [2021-10-07 15:47:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:47:28,079 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 3190 transitions. [2021-10-07 15:47:28,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3190 transitions. [2021-10-07 15:47:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:47:28,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:47:28,081 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:47:28,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2021-10-07 15:47:28,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:47:28,293 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:47:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:47:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash -866873573, now seen corresponding path program 86 times [2021-10-07 15:47:28,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:47:28,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62036713] [2021-10-07 15:47:28,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:47:28,295 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:47:28,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:47:28,296 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:47:28,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2021-10-07 15:47:29,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:47:29,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:47:29,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:47:29,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:47:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:29,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:47:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:29,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:47:29,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62036713] [2021-10-07 15:47:29,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62036713] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:47:29,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:47:29,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:47:29,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751757886] [2021-10-07 15:47:29,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:47:29,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:47:29,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:47:29,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:47:29,927 INFO L87 Difference]: Start difference. First operand 888 states and 3190 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:32,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:47:32,134 INFO L93 Difference]: Finished difference Result 1082 states and 3614 transitions. [2021-10-07 15:47:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:47:32,135 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:47:32,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:47:32,138 INFO L225 Difference]: With dead ends: 1082 [2021-10-07 15:47:32,138 INFO L226 Difference]: Without dead ends: 1080 [2021-10-07 15:47:32,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2053.0ms TimeCoverageRelationStatistics Valid=246, Invalid=684, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:47:32,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-10-07 15:47:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 900. [2021-10-07 15:47:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.599555061179088) internal successors, (3236), 899 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3236 transitions. [2021-10-07 15:47:32,163 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3236 transitions. Word has length 18 [2021-10-07 15:47:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:47:32,164 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 3236 transitions. [2021-10-07 15:47:32,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3236 transitions. [2021-10-07 15:47:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:47:32,167 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:47:32,167 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:47:32,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2021-10-07 15:47:32,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:47:32,381 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:47:32,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:47:32,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1666312710, now seen corresponding path program 87 times [2021-10-07 15:47:32,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:47:32,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251162057] [2021-10-07 15:47:32,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:47:32,383 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:47:32,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:47:32,384 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:47:32,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2021-10-07 15:47:33,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:47:33,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:47:33,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:47:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:47:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:33,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:47:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:34,171 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:47:34,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251162057] [2021-10-07 15:47:34,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251162057] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:47:34,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:47:34,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-07 15:47:34,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677689135] [2021-10-07 15:47:34,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:47:34,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:47:34,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:47:34,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:47:34,173 INFO L87 Difference]: Start difference. First operand 900 states and 3236 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:47:38,347 INFO L93 Difference]: Finished difference Result 1044 states and 3579 transitions. [2021-10-07 15:47:38,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 15:47:38,348 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:47:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:47:38,350 INFO L225 Difference]: With dead ends: 1044 [2021-10-07 15:47:38,350 INFO L226 Difference]: Without dead ends: 1042 [2021-10-07 15:47:38,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 3170.7ms TimeCoverageRelationStatistics Valid=272, Invalid=918, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 15:47:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-10-07 15:47:38,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 918. [2021-10-07 15:47:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 3.6063249727371867) internal successors, (3307), 917 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 3307 transitions. [2021-10-07 15:47:38,367 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 3307 transitions. Word has length 18 [2021-10-07 15:47:38,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:47:38,367 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 3307 transitions. [2021-10-07 15:47:38,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 3307 transitions. [2021-10-07 15:47:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:47:38,369 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:47:38,369 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:47:38,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2021-10-07 15:47:38,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:47:38,570 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:47:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:47:38,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1009424682, now seen corresponding path program 88 times [2021-10-07 15:47:38,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:47:38,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628501242] [2021-10-07 15:47:38,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:47:38,572 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:47:38,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:47:38,573 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:47:38,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2021-10-07 15:47:39,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:47:39,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:47:39,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:47:39,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:47:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:39,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:47:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:40,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:47:40,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628501242] [2021-10-07 15:47:40,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628501242] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:47:40,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:47:40,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:47:40,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19923901] [2021-10-07 15:47:40,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:47:40,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:47:40,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:47:40,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:47:40,385 INFO L87 Difference]: Start difference. First operand 918 states and 3307 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:47:46,609 INFO L93 Difference]: Finished difference Result 1196 states and 3951 transitions. [2021-10-07 15:47:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-07 15:47:46,611 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:47:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:47:46,614 INFO L225 Difference]: With dead ends: 1196 [2021-10-07 15:47:46,614 INFO L226 Difference]: Without dead ends: 1196 [2021-10-07 15:47:46,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 4634.5ms TimeCoverageRelationStatistics Valid=443, Invalid=1279, Unknown=0, NotChecked=0, Total=1722 [2021-10-07 15:47:46,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-10-07 15:47:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 940. [2021-10-07 15:47:46,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.623003194888179) internal successors, (3402), 939 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3402 transitions. [2021-10-07 15:47:46,635 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3402 transitions. Word has length 18 [2021-10-07 15:47:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:47:46,635 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 3402 transitions. [2021-10-07 15:47:46,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3402 transitions. [2021-10-07 15:47:46,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:47:46,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:47:46,637 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:47:46,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2021-10-07 15:47:46,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:47:46,838 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:47:46,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:47:46,839 INFO L82 PathProgramCache]: Analyzing trace with hash -331643771, now seen corresponding path program 89 times [2021-10-07 15:47:46,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:47:46,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134176515] [2021-10-07 15:47:46,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:47:46,840 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:47:46,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:47:46,842 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:47:46,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2021-10-07 15:47:47,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:47:47,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:47:47,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:47:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:47:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:47,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:47:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:48,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:47:48,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134176515] [2021-10-07 15:47:48,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134176515] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:47:48,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:47:48,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:47:48,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407002546] [2021-10-07 15:47:48,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:47:48,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:47:48,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:47:48,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:47:48,814 INFO L87 Difference]: Start difference. First operand 940 states and 3402 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:47:51,647 INFO L93 Difference]: Finished difference Result 1200 states and 4063 transitions. [2021-10-07 15:47:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:47:51,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:47:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:47:51,651 INFO L225 Difference]: With dead ends: 1200 [2021-10-07 15:47:51,652 INFO L226 Difference]: Without dead ends: 1200 [2021-10-07 15:47:51,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2140.8ms TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:47:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-10-07 15:47:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 958. [2021-10-07 15:47:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.6290491118077326) internal successors, (3473), 957 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3473 transitions. [2021-10-07 15:47:51,682 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3473 transitions. Word has length 18 [2021-10-07 15:47:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:47:51,682 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 3473 transitions. [2021-10-07 15:47:51,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3473 transitions. [2021-10-07 15:47:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:47:51,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:47:51,686 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:47:51,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2021-10-07 15:47:51,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:47:51,902 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:47:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:47:51,902 INFO L82 PathProgramCache]: Analyzing trace with hash -332238417, now seen corresponding path program 90 times [2021-10-07 15:47:51,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:47:51,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718469684] [2021-10-07 15:47:51,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:47:51,903 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:47:51,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:47:51,905 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:47:51,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2021-10-07 15:47:52,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:47:52,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:47:52,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:47:52,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:47:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:53,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:47:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:53,454 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:47:53,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718469684] [2021-10-07 15:47:53,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718469684] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:47:53,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:47:53,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:47:53,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240403930] [2021-10-07 15:47:53,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:47:53,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:47:53,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:47:53,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:47:53,457 INFO L87 Difference]: Start difference. First operand 958 states and 3473 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:57,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:47:57,085 INFO L93 Difference]: Finished difference Result 1194 states and 4001 transitions. [2021-10-07 15:47:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:47:57,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:47:57,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:47:57,088 INFO L225 Difference]: With dead ends: 1194 [2021-10-07 15:47:57,089 INFO L226 Difference]: Without dead ends: 1184 [2021-10-07 15:47:57,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2518.0ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:47:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-10-07 15:47:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 964. [2021-10-07 15:47:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.6261682242990654) internal successors, (3492), 963 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:57,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3492 transitions. [2021-10-07 15:47:57,107 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3492 transitions. Word has length 18 [2021-10-07 15:47:57,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:47:57,108 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 3492 transitions. [2021-10-07 15:47:57,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:47:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3492 transitions. [2021-10-07 15:47:57,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:47:57,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:47:57,110 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:47:57,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (109)] Ended with exit code 0 [2021-10-07 15:47:57,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:47:57,311 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:47:57,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:47:57,312 INFO L82 PathProgramCache]: Analyzing trace with hash -474194880, now seen corresponding path program 91 times [2021-10-07 15:47:57,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:47:57,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388896930] [2021-10-07 15:47:57,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:47:57,313 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:47:57,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:47:57,314 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:47:57,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2021-10-07 15:47:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:47:58,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:47:58,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:47:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:58,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:47:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:47:59,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:47:59,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388896930] [2021-10-07 15:47:59,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388896930] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:47:59,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:47:59,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:47:59,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475305379] [2021-10-07 15:47:59,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:47:59,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:47:59,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:47:59,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:47:59,109 INFO L87 Difference]: Start difference. First operand 964 states and 3492 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:05,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:05,228 INFO L93 Difference]: Finished difference Result 1200 states and 3995 transitions. [2021-10-07 15:48:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 15:48:05,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:05,233 INFO L225 Difference]: With dead ends: 1200 [2021-10-07 15:48:05,233 INFO L226 Difference]: Without dead ends: 1200 [2021-10-07 15:48:05,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 4760.6ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:48:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-10-07 15:48:05,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 968. [2021-10-07 15:48:05,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 3.623578076525336) internal successors, (3504), 967 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 3504 transitions. [2021-10-07 15:48:05,253 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 3504 transitions. Word has length 18 [2021-10-07 15:48:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:05,253 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 3504 transitions. [2021-10-07 15:48:05,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 3504 transitions. [2021-10-07 15:48:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:05,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:05,255 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:05,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (110)] Ended with exit code 0 [2021-10-07 15:48:05,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:05,456 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:05,457 INFO L82 PathProgramCache]: Analyzing trace with hash -922127249, now seen corresponding path program 92 times [2021-10-07 15:48:05,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:05,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346285684] [2021-10-07 15:48:05,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:48:05,458 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:05,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:05,459 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:05,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2021-10-07 15:48:06,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:48:06,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:48:06,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:48:06,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:06,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:07,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:07,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346285684] [2021-10-07 15:48:07,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346285684] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:07,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:07,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:48:07,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131564478] [2021-10-07 15:48:07,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:48:07,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:07,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:48:07,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:48:07,009 INFO L87 Difference]: Start difference. First operand 968 states and 3504 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:07,986 INFO L93 Difference]: Finished difference Result 1028 states and 3627 transitions. [2021-10-07 15:48:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:48:07,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:07,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:07,989 INFO L225 Difference]: With dead ends: 1028 [2021-10-07 15:48:07,990 INFO L226 Difference]: Without dead ends: 1004 [2021-10-07 15:48:07,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 846.0ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:48:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-10-07 15:48:08,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 968. [2021-10-07 15:48:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 3.6153050672182006) internal successors, (3496), 967 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:08,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 3496 transitions. [2021-10-07 15:48:08,010 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 3496 transitions. Word has length 18 [2021-10-07 15:48:08,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:08,010 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 3496 transitions. [2021-10-07 15:48:08,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:08,010 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 3496 transitions. [2021-10-07 15:48:08,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:08,012 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:08,012 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:08,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (111)] Ended with exit code 0 [2021-10-07 15:48:08,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:08,213 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:08,214 INFO L82 PathProgramCache]: Analyzing trace with hash 115693952, now seen corresponding path program 93 times [2021-10-07 15:48:08,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:08,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569130868] [2021-10-07 15:48:08,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:48:08,215 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:08,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:08,216 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:08,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2021-10-07 15:48:09,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:48:09,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:48:09,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:48:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:09,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:09,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:09,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569130868] [2021-10-07 15:48:09,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569130868] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:09,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:09,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:48:09,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673648064] [2021-10-07 15:48:09,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:48:09,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:09,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:48:09,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:48:09,927 INFO L87 Difference]: Start difference. First operand 968 states and 3496 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:16,662 INFO L93 Difference]: Finished difference Result 1266 states and 4163 transitions. [2021-10-07 15:48:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:48:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:16,667 INFO L225 Difference]: With dead ends: 1266 [2021-10-07 15:48:16,667 INFO L226 Difference]: Without dead ends: 1266 [2021-10-07 15:48:16,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 5432.2ms TimeCoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 15:48:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-10-07 15:48:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 978. [2021-10-07 15:48:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 3.6202661207778917) internal successors, (3537), 977 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3537 transitions. [2021-10-07 15:48:16,688 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3537 transitions. Word has length 18 [2021-10-07 15:48:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:16,688 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 3537 transitions. [2021-10-07 15:48:16,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3537 transitions. [2021-10-07 15:48:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:16,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:16,691 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:16,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (112)] Ended with exit code 0 [2021-10-07 15:48:16,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:16,892 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:16,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2016809081, now seen corresponding path program 94 times [2021-10-07 15:48:16,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:16,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922053963] [2021-10-07 15:48:16,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:48:16,894 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:16,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:16,895 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:16,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2021-10-07 15:48:17,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:48:17,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:48:17,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:48:17,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:18,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:18,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:18,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922053963] [2021-10-07 15:48:18,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922053963] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:18,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:18,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:48:18,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345581602] [2021-10-07 15:48:18,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:48:18,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:18,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:48:18,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:48:18,511 INFO L87 Difference]: Start difference. First operand 978 states and 3537 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:19,641 INFO L93 Difference]: Finished difference Result 1310 states and 4542 transitions. [2021-10-07 15:48:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:48:19,642 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:19,645 INFO L225 Difference]: With dead ends: 1310 [2021-10-07 15:48:19,645 INFO L226 Difference]: Without dead ends: 1310 [2021-10-07 15:48:19,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 945.1ms TimeCoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 15:48:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-10-07 15:48:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 980. [2021-10-07 15:48:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 3.624106230847804) internal successors, (3548), 979 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 3548 transitions. [2021-10-07 15:48:19,680 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 3548 transitions. Word has length 18 [2021-10-07 15:48:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:19,680 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 3548 transitions. [2021-10-07 15:48:19,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 3548 transitions. [2021-10-07 15:48:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:19,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:19,682 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:19,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (113)] Ended with exit code 0 [2021-10-07 15:48:19,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:19,883 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:19,884 INFO L82 PathProgramCache]: Analyzing trace with hash 439512006, now seen corresponding path program 95 times [2021-10-07 15:48:19,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:19,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089645478] [2021-10-07 15:48:19,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:48:19,885 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:19,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:19,887 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:19,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2021-10-07 15:48:20,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:48:20,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:48:20,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:48:20,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:21,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:21,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:21,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089645478] [2021-10-07 15:48:21,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089645478] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:21,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:21,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:48:21,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754535182] [2021-10-07 15:48:21,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:48:21,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:21,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:48:21,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:48:21,402 INFO L87 Difference]: Start difference. First operand 980 states and 3548 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:21,954 INFO L93 Difference]: Finished difference Result 1122 states and 3953 transitions. [2021-10-07 15:48:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:48:21,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:21,957 INFO L225 Difference]: With dead ends: 1122 [2021-10-07 15:48:21,957 INFO L226 Difference]: Without dead ends: 1114 [2021-10-07 15:48:21,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 487.0ms TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:48:21,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-10-07 15:48:21,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 980. [2021-10-07 15:48:21,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 3.6220633299284986) internal successors, (3546), 979 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:21,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 3546 transitions. [2021-10-07 15:48:21,987 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 3546 transitions. Word has length 18 [2021-10-07 15:48:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:21,988 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 3546 transitions. [2021-10-07 15:48:21,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 3546 transitions. [2021-10-07 15:48:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:21,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:21,990 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:22,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2021-10-07 15:48:22,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:22,191 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:22,192 INFO L82 PathProgramCache]: Analyzing trace with hash 257806471, now seen corresponding path program 96 times [2021-10-07 15:48:22,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:22,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962702585] [2021-10-07 15:48:22,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:48:22,193 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:22,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:22,194 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:22,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2021-10-07 15:48:23,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:48:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:48:23,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:48:23,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:23,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:23,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:23,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962702585] [2021-10-07 15:48:23,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962702585] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:23,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:23,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:48:23,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195210241] [2021-10-07 15:48:23,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:48:23,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:23,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:48:23,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:48:23,884 INFO L87 Difference]: Start difference. First operand 980 states and 3546 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:28,060 INFO L93 Difference]: Finished difference Result 1208 states and 4134 transitions. [2021-10-07 15:48:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:48:28,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:28,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:28,064 INFO L225 Difference]: With dead ends: 1208 [2021-10-07 15:48:28,064 INFO L226 Difference]: Without dead ends: 1208 [2021-10-07 15:48:28,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3904.3ms TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:48:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-10-07 15:48:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 988. [2021-10-07 15:48:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 3.6210739614994933) internal successors, (3574), 987 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 3574 transitions. [2021-10-07 15:48:28,092 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 3574 transitions. Word has length 18 [2021-10-07 15:48:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:28,092 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 3574 transitions. [2021-10-07 15:48:28,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 3574 transitions. [2021-10-07 15:48:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:28,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:28,094 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:28,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (115)] Forceful destruction successful, exit code 0 [2021-10-07 15:48:28,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:28,295 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:28,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:28,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1753922722, now seen corresponding path program 97 times [2021-10-07 15:48:28,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:28,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878953987] [2021-10-07 15:48:28,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:48:28,297 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:28,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:28,298 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:28,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2021-10-07 15:48:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:48:29,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:48:29,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:29,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:29,735 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:29,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878953987] [2021-10-07 15:48:29,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878953987] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:29,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:29,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:48:29,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899472955] [2021-10-07 15:48:29,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:48:29,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:29,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:48:29,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:48:29,737 INFO L87 Difference]: Start difference. First operand 988 states and 3574 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:31,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:31,057 INFO L93 Difference]: Finished difference Result 1186 states and 4077 transitions. [2021-10-07 15:48:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:48:31,058 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:31,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:31,061 INFO L225 Difference]: With dead ends: 1186 [2021-10-07 15:48:31,061 INFO L226 Difference]: Without dead ends: 1180 [2021-10-07 15:48:31,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1006.6ms TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 15:48:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-10-07 15:48:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 994. [2021-10-07 15:48:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 3.622356495468278) internal successors, (3597), 993 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 3597 transitions. [2021-10-07 15:48:31,096 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 3597 transitions. Word has length 18 [2021-10-07 15:48:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:31,096 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 3597 transitions. [2021-10-07 15:48:31,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 3597 transitions. [2021-10-07 15:48:31,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:31,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:31,098 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:31,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (116)] Ended with exit code 0 [2021-10-07 15:48:31,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:31,300 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1739870009, now seen corresponding path program 98 times [2021-10-07 15:48:31,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:31,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136255246] [2021-10-07 15:48:31,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:48:31,302 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:31,303 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:31,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2021-10-07 15:48:32,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:48:32,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:48:32,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:48:32,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:32,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:33,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:33,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136255246] [2021-10-07 15:48:33,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136255246] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:33,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:33,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:48:33,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104902002] [2021-10-07 15:48:33,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:48:33,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:33,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:48:33,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:48:33,036 INFO L87 Difference]: Start difference. First operand 994 states and 3597 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:37,074 INFO L93 Difference]: Finished difference Result 1236 states and 4210 transitions. [2021-10-07 15:48:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:48:37,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:37,078 INFO L225 Difference]: With dead ends: 1236 [2021-10-07 15:48:37,078 INFO L226 Difference]: Without dead ends: 1236 [2021-10-07 15:48:37,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 3822.9ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:48:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-10-07 15:48:37,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1000. [2021-10-07 15:48:37,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 3.6216216216216215) internal successors, (3618), 999 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:37,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 3618 transitions. [2021-10-07 15:48:37,097 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 3618 transitions. Word has length 18 [2021-10-07 15:48:37,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:37,097 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 3618 transitions. [2021-10-07 15:48:37,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 3618 transitions. [2021-10-07 15:48:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:37,099 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:37,099 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:37,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (117)] Ended with exit code 0 [2021-10-07 15:48:37,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:37,300 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:37,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:37,301 INFO L82 PathProgramCache]: Analyzing trace with hash 705144194, now seen corresponding path program 99 times [2021-10-07 15:48:37,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:37,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162448836] [2021-10-07 15:48:37,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:48:37,302 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:37,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:37,303 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:37,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2021-10-07 15:48:38,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:48:38,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:48:38,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:48:38,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:38,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:38,783 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:38,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162448836] [2021-10-07 15:48:38,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162448836] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:38,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:38,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:48:38,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355975351] [2021-10-07 15:48:38,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:48:38,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:48:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:48:38,784 INFO L87 Difference]: Start difference. First operand 1000 states and 3618 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:40,075 INFO L93 Difference]: Finished difference Result 1188 states and 4096 transitions. [2021-10-07 15:48:40,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 15:48:40,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:40,078 INFO L225 Difference]: With dead ends: 1188 [2021-10-07 15:48:40,078 INFO L226 Difference]: Without dead ends: 1184 [2021-10-07 15:48:40,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 926.5ms TimeCoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:48:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-10-07 15:48:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1002. [2021-10-07 15:48:40,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 3.6193806193806193) internal successors, (3623), 1001 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3623 transitions. [2021-10-07 15:48:40,097 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3623 transitions. Word has length 18 [2021-10-07 15:48:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:40,097 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 3623 transitions. [2021-10-07 15:48:40,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:40,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3623 transitions. [2021-10-07 15:48:40,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:40,099 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:40,099 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:40,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2021-10-07 15:48:40,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:40,300 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:40,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1879775233, now seen corresponding path program 100 times [2021-10-07 15:48:40,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:40,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788453640] [2021-10-07 15:48:40,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:48:40,302 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:40,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:40,303 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:40,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2021-10-07 15:48:41,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:48:41,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:48:41,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:48:41,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:41,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:41,650 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:41,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788453640] [2021-10-07 15:48:41,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788453640] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:41,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:41,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:48:41,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360464020] [2021-10-07 15:48:41,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:48:41,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:48:41,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:48:41,654 INFO L87 Difference]: Start difference. First operand 1002 states and 3623 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:43,404 INFO L93 Difference]: Finished difference Result 1262 states and 4283 transitions. [2021-10-07 15:48:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:48:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:43,408 INFO L225 Difference]: With dead ends: 1262 [2021-10-07 15:48:43,408 INFO L226 Difference]: Without dead ends: 1258 [2021-10-07 15:48:43,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1319.3ms TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:48:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-10-07 15:48:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1012. [2021-10-07 15:48:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 3.6181998021760635) internal successors, (3658), 1011 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3658 transitions. [2021-10-07 15:48:43,429 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3658 transitions. Word has length 18 [2021-10-07 15:48:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:43,429 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 3658 transitions. [2021-10-07 15:48:43,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3658 transitions. [2021-10-07 15:48:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:43,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:43,432 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:43,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (119)] Ended with exit code 0 [2021-10-07 15:48:43,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:43,632 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1880369879, now seen corresponding path program 101 times [2021-10-07 15:48:43,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:43,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169213005] [2021-10-07 15:48:43,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:48:43,634 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:43,636 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:43,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2021-10-07 15:48:44,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:48:44,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:48:44,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:48:44,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:44,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:45,087 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:45,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169213005] [2021-10-07 15:48:45,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169213005] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:45,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:45,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:48:45,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458972392] [2021-10-07 15:48:45,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:48:45,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:48:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:48:45,089 INFO L87 Difference]: Start difference. First operand 1012 states and 3658 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:47,701 INFO L93 Difference]: Finished difference Result 1590 states and 5485 transitions. [2021-10-07 15:48:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-07 15:48:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:47,706 INFO L225 Difference]: With dead ends: 1590 [2021-10-07 15:48:47,706 INFO L226 Difference]: Without dead ends: 1586 [2021-10-07 15:48:47,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 2220.1ms TimeCoverageRelationStatistics Valid=488, Invalid=1582, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:48:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-10-07 15:48:47,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1008. [2021-10-07 15:48:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 3.6146971201588878) internal successors, (3640), 1007 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 3640 transitions. [2021-10-07 15:48:47,743 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 3640 transitions. Word has length 18 [2021-10-07 15:48:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:47,743 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 3640 transitions. [2021-10-07 15:48:47,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 3640 transitions. [2021-10-07 15:48:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:47,745 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:47,745 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:47,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (120)] Ended with exit code 0 [2021-10-07 15:48:47,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:47,946 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:47,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:47,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2022326342, now seen corresponding path program 102 times [2021-10-07 15:48:47,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:47,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811064682] [2021-10-07 15:48:47,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:48:47,948 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:47,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:47,949 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:47,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2021-10-07 15:48:49,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:48:49,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:48:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:48:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:49,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:49,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:49,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811064682] [2021-10-07 15:48:49,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811064682] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:49,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:49,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:48:49,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613290322] [2021-10-07 15:48:49,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:48:49,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:49,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:48:49,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:48:49,461 INFO L87 Difference]: Start difference. First operand 1008 states and 3640 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:50,983 INFO L93 Difference]: Finished difference Result 1260 states and 4246 transitions. [2021-10-07 15:48:50,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:48:50,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:50,987 INFO L225 Difference]: With dead ends: 1260 [2021-10-07 15:48:50,987 INFO L226 Difference]: Without dead ends: 1260 [2021-10-07 15:48:50,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1115.1ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 15:48:50,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-10-07 15:48:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1010. [2021-10-07 15:48:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 3.614469772051536) internal successors, (3647), 1009 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 3647 transitions. [2021-10-07 15:48:51,009 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 3647 transitions. Word has length 18 [2021-10-07 15:48:51,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:51,009 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 3647 transitions. [2021-10-07 15:48:51,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 3647 transitions. [2021-10-07 15:48:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:51,011 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:51,011 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:51,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (121)] Forceful destruction successful, exit code 0 [2021-10-07 15:48:51,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:51,213 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:51,214 INFO L82 PathProgramCache]: Analyzing trace with hash -538232159, now seen corresponding path program 103 times [2021-10-07 15:48:51,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:51,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888653344] [2021-10-07 15:48:51,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:48:51,215 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:51,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:51,216 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:51,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2021-10-07 15:48:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:48:52,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:48:52,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:52,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:52,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:52,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888653344] [2021-10-07 15:48:52,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888653344] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:52,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:52,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:48:52,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747898647] [2021-10-07 15:48:52,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:48:52,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:52,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:48:52,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:48:52,884 INFO L87 Difference]: Start difference. First operand 1010 states and 3647 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:56,884 INFO L93 Difference]: Finished difference Result 1148 states and 3970 transitions. [2021-10-07 15:48:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:48:56,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:56,887 INFO L225 Difference]: With dead ends: 1148 [2021-10-07 15:48:56,887 INFO L226 Difference]: Without dead ends: 1148 [2021-10-07 15:48:56,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 3469.5ms TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 15:48:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-10-07 15:48:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1018. [2021-10-07 15:48:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 3.6135693215339235) internal successors, (3675), 1017 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 3675 transitions. [2021-10-07 15:48:56,905 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 3675 transitions. Word has length 18 [2021-10-07 15:48:56,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:56,905 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 3675 transitions. [2021-10-07 15:48:56,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 3675 transitions. [2021-10-07 15:48:56,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:56,907 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:56,907 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:56,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2021-10-07 15:48:57,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:48:57,108 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:48:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:48:57,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1745005944, now seen corresponding path program 104 times [2021-10-07 15:48:57,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:48:57,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747499970] [2021-10-07 15:48:57,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:48:57,110 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:48:57,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:48:57,112 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:48:57,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2021-10-07 15:48:58,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:48:58,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:48:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:48:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:48:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:58,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:48:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:48:58,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:48:58,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747499970] [2021-10-07 15:48:58,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747499970] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:48:58,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:48:58,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:48:58,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554227656] [2021-10-07 15:48:58,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:48:58,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:48:58,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:48:58,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:48:58,657 INFO L87 Difference]: Start difference. First operand 1018 states and 3675 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:48:59,917 INFO L93 Difference]: Finished difference Result 1132 states and 3925 transitions. [2021-10-07 15:48:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:48:59,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:48:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:48:59,922 INFO L225 Difference]: With dead ends: 1132 [2021-10-07 15:48:59,922 INFO L226 Difference]: Without dead ends: 1126 [2021-10-07 15:48:59,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 872.3ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-10-07 15:48:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-10-07 15:48:59,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1026. [2021-10-07 15:48:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 3.6146341463414635) internal successors, (3705), 1025 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 3705 transitions. [2021-10-07 15:48:59,941 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 3705 transitions. Word has length 18 [2021-10-07 15:48:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:48:59,942 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 3705 transitions. [2021-10-07 15:48:59,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:48:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 3705 transitions. [2021-10-07 15:48:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:48:59,944 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:48:59,944 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:48:59,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:00,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:00,145 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:00,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1600719407, now seen corresponding path program 105 times [2021-10-07 15:49:00,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:00,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507186424] [2021-10-07 15:49:00,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:49:00,147 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:00,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:00,148 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:00,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2021-10-07 15:49:01,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:49:01,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:49:01,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:49:01,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:01,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:01,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:01,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507186424] [2021-10-07 15:49:01,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507186424] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:01,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:01,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-07 15:49:01,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152487757] [2021-10-07 15:49:01,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:49:01,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:01,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:49:01,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:49:01,931 INFO L87 Difference]: Start difference. First operand 1026 states and 3705 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:06,271 INFO L93 Difference]: Finished difference Result 1208 states and 4107 transitions. [2021-10-07 15:49:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 15:49:06,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:49:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:06,276 INFO L225 Difference]: With dead ends: 1208 [2021-10-07 15:49:06,276 INFO L226 Difference]: Without dead ends: 1208 [2021-10-07 15:49:06,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 3689.8ms TimeCoverageRelationStatistics Valid=352, Invalid=980, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:49:06,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-10-07 15:49:06,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1038. [2021-10-07 15:49:06,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 3.621022179363549) internal successors, (3755), 1037 states have internal predecessors, (3755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:06,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3755 transitions. [2021-10-07 15:49:06,295 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3755 transitions. Word has length 18 [2021-10-07 15:49:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:06,295 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 3755 transitions. [2021-10-07 15:49:06,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3755 transitions. [2021-10-07 15:49:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:49:06,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:06,297 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:49:06,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (124)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:06,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:06,498 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:06,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:06,499 INFO L82 PathProgramCache]: Analyzing trace with hash -90894436, now seen corresponding path program 106 times [2021-10-07 15:49:06,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:06,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614241300] [2021-10-07 15:49:06,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:49:06,501 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:06,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:06,502 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:06,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2021-10-07 15:49:07,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:49:07,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:49:07,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:49:07,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:07,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:08,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:08,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614241300] [2021-10-07 15:49:08,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614241300] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:08,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:08,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:49:08,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721096019] [2021-10-07 15:49:08,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:49:08,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:08,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:49:08,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:49:08,059 INFO L87 Difference]: Start difference. First operand 1038 states and 3755 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:10,220 INFO L93 Difference]: Finished difference Result 1190 states and 4074 transitions. [2021-10-07 15:49:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:49:10,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:49:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:10,223 INFO L225 Difference]: With dead ends: 1190 [2021-10-07 15:49:10,223 INFO L226 Difference]: Without dead ends: 1186 [2021-10-07 15:49:10,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1579.8ms TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:49:10,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-10-07 15:49:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1044. [2021-10-07 15:49:10,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.6241610738255035) internal successors, (3780), 1043 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3780 transitions. [2021-10-07 15:49:10,243 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3780 transitions. Word has length 18 [2021-10-07 15:49:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:10,243 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 3780 transitions. [2021-10-07 15:49:10,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:10,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3780 transitions. [2021-10-07 15:49:10,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:49:10,245 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:10,245 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:49:10,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (125)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:10,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:10,447 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:10,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:10,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1619153433, now seen corresponding path program 107 times [2021-10-07 15:49:10,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:10,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075025358] [2021-10-07 15:49:10,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:49:10,449 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:10,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:10,451 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:10,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2021-10-07 15:49:11,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:49:11,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:49:11,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:49:11,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:11,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:12,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:12,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075025358] [2021-10-07 15:49:12,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075025358] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:12,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:12,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:49:12,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595221272] [2021-10-07 15:49:12,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:49:12,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:49:12,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:49:12,086 INFO L87 Difference]: Start difference. First operand 1044 states and 3780 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:15,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:15,653 INFO L93 Difference]: Finished difference Result 1656 states and 5372 transitions. [2021-10-07 15:49:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-07 15:49:15,655 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:49:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:15,658 INFO L225 Difference]: With dead ends: 1656 [2021-10-07 15:49:15,658 INFO L226 Difference]: Without dead ends: 1652 [2021-10-07 15:49:15,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 3021.9ms TimeCoverageRelationStatistics Valid=434, Invalid=1546, Unknown=0, NotChecked=0, Total=1980 [2021-10-07 15:49:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-10-07 15:49:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1078. [2021-10-07 15:49:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 3.625812441968431) internal successors, (3905), 1077 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:15,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 3905 transitions. [2021-10-07 15:49:15,703 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 3905 transitions. Word has length 18 [2021-10-07 15:49:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:15,703 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 3905 transitions. [2021-10-07 15:49:15,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 3905 transitions. [2021-10-07 15:49:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:49:15,706 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:15,706 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:49:15,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:15,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:15,922 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:15,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:15,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1618558787, now seen corresponding path program 108 times [2021-10-07 15:49:15,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:15,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7562731] [2021-10-07 15:49:15,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:49:15,924 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:15,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:15,925 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:15,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2021-10-07 15:49:17,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:49:17,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:49:17,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-07 15:49:17,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:17,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:17,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:17,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7562731] [2021-10-07 15:49:17,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7562731] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:17,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:17,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-07 15:49:17,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942938413] [2021-10-07 15:49:17,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:49:17,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:17,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:49:17,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:49:17,832 INFO L87 Difference]: Start difference. First operand 1078 states and 3905 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:24,226 INFO L93 Difference]: Finished difference Result 1516 states and 5171 transitions. [2021-10-07 15:49:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-07 15:49:24,228 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:49:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:24,232 INFO L225 Difference]: With dead ends: 1516 [2021-10-07 15:49:24,232 INFO L226 Difference]: Without dead ends: 1512 [2021-10-07 15:49:24,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 5644.7ms TimeCoverageRelationStatistics Valid=589, Invalid=2491, Unknown=0, NotChecked=0, Total=3080 [2021-10-07 15:49:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2021-10-07 15:49:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1094. [2021-10-07 15:49:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.629460201280878) internal successors, (3967), 1093 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3967 transitions. [2021-10-07 15:49:24,263 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3967 transitions. Word has length 18 [2021-10-07 15:49:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:24,263 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 3967 transitions. [2021-10-07 15:49:24,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:24,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3967 transitions. [2021-10-07 15:49:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:49:24,265 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:24,265 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:49:24,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (127)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:24,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:24,466 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:24,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1479061181, now seen corresponding path program 109 times [2021-10-07 15:49:24,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:24,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274654521] [2021-10-07 15:49:24,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:49:24,468 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:24,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:24,470 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:24,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2021-10-07 15:49:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:49:25,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:49:25,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:25,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:26,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:26,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274654521] [2021-10-07 15:49:26,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274654521] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:26,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:26,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:49:26,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368361422] [2021-10-07 15:49:26,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:49:26,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:26,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:49:26,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:49:26,150 INFO L87 Difference]: Start difference. First operand 1094 states and 3967 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:29,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:29,563 INFO L93 Difference]: Finished difference Result 1280 states and 4412 transitions. [2021-10-07 15:49:29,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:49:29,564 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:49:29,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:29,567 INFO L225 Difference]: With dead ends: 1280 [2021-10-07 15:49:29,567 INFO L226 Difference]: Without dead ends: 1280 [2021-10-07 15:49:29,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2735.6ms TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 15:49:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-10-07 15:49:29,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1112. [2021-10-07 15:49:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.630963096309631) internal successors, (4034), 1111 states have internal predecessors, (4034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4034 transitions. [2021-10-07 15:49:29,598 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4034 transitions. Word has length 18 [2021-10-07 15:49:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:29,598 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 4034 transitions. [2021-10-07 15:49:29,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4034 transitions. [2021-10-07 15:49:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:49:29,601 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:29,601 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:49:29,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (128)] Ended with exit code 0 [2021-10-07 15:49:29,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:29,802 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:29,804 INFO L82 PathProgramCache]: Analyzing trace with hash 444335366, now seen corresponding path program 110 times [2021-10-07 15:49:29,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:29,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940146887] [2021-10-07 15:49:29,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:49:29,805 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:29,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:29,806 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:29,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2021-10-07 15:49:30,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:49:30,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:49:30,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:49:30,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:31,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:31,374 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:31,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940146887] [2021-10-07 15:49:31,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940146887] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:31,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:31,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:49:31,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239030913] [2021-10-07 15:49:31,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:49:31,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:31,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:49:31,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:49:31,376 INFO L87 Difference]: Start difference. First operand 1112 states and 4034 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:33,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:33,073 INFO L93 Difference]: Finished difference Result 1230 states and 4277 transitions. [2021-10-07 15:49:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:49:33,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:49:33,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:33,084 INFO L225 Difference]: With dead ends: 1230 [2021-10-07 15:49:33,084 INFO L226 Difference]: Without dead ends: 1222 [2021-10-07 15:49:33,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1104.4ms TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:49:33,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-10-07 15:49:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1116. [2021-10-07 15:49:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.6286995515695066) internal successors, (4046), 1115 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 4046 transitions. [2021-10-07 15:49:33,108 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 4046 transitions. Word has length 18 [2021-10-07 15:49:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:33,108 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 4046 transitions. [2021-10-07 15:49:33,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 4046 transitions. [2021-10-07 15:49:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:49:33,111 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:33,111 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:49:33,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (129)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:33,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:33,325 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:33,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1354944098, now seen corresponding path program 111 times [2021-10-07 15:49:33,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:33,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232420038] [2021-10-07 15:49:33,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:49:33,327 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:33,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:33,328 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:33,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2021-10-07 15:49:34,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:49:34,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:49:34,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:49:34,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:34,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:34,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:34,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232420038] [2021-10-07 15:49:34,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232420038] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:34,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:34,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:49:34,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397195268] [2021-10-07 15:49:34,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:49:34,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:34,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:49:34,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:49:34,872 INFO L87 Difference]: Start difference. First operand 1116 states and 4046 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:37,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:37,067 INFO L93 Difference]: Finished difference Result 1268 states and 4397 transitions. [2021-10-07 15:49:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:49:37,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:49:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:37,071 INFO L225 Difference]: With dead ends: 1268 [2021-10-07 15:49:37,072 INFO L226 Difference]: Without dead ends: 1262 [2021-10-07 15:49:37,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1715.0ms TimeCoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:49:37,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-10-07 15:49:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1122. [2021-10-07 15:49:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.626226583407672) internal successors, (4065), 1121 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 4065 transitions. [2021-10-07 15:49:37,095 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 4065 transitions. Word has length 18 [2021-10-07 15:49:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:37,095 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 4065 transitions. [2021-10-07 15:49:37,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 4065 transitions. [2021-10-07 15:49:37,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:49:37,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:37,098 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:49:37,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (130)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:37,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:37,299 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:37,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:37,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1569129255, now seen corresponding path program 112 times [2021-10-07 15:49:37,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:37,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384015973] [2021-10-07 15:49:37,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:49:37,300 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:37,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:37,302 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:37,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2021-10-07 15:49:38,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:49:38,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:49:38,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:49:38,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:38,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:38,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:38,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384015973] [2021-10-07 15:49:38,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384015973] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:38,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:38,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:49:38,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679312597] [2021-10-07 15:49:38,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:49:38,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:38,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:49:38,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:49:38,870 INFO L87 Difference]: Start difference. First operand 1122 states and 4065 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:40,740 INFO L93 Difference]: Finished difference Result 1316 states and 4512 transitions. [2021-10-07 15:49:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 15:49:40,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:49:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:40,744 INFO L225 Difference]: With dead ends: 1316 [2021-10-07 15:49:40,744 INFO L226 Difference]: Without dead ends: 1316 [2021-10-07 15:49:40,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1448.7ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 15:49:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-10-07 15:49:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1130. [2021-10-07 15:49:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 3.6306465899025686) internal successors, (4099), 1129 states have internal predecessors, (4099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 4099 transitions. [2021-10-07 15:49:40,769 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 4099 transitions. Word has length 18 [2021-10-07 15:49:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:40,770 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 4099 transitions. [2021-10-07 15:49:40,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 4099 transitions. [2021-10-07 15:49:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:49:40,772 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:40,772 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:49:40,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (131)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:40,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:40,973 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:40,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:40,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1569723901, now seen corresponding path program 113 times [2021-10-07 15:49:40,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:40,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137110068] [2021-10-07 15:49:40,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:49:40,975 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:40,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:40,976 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:40,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2021-10-07 15:49:42,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:49:42,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:49:42,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:49:42,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:42,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:42,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:42,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137110068] [2021-10-07 15:49:42,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137110068] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:42,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:42,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:49:42,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268624647] [2021-10-07 15:49:42,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:49:42,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:42,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:49:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:49:42,677 INFO L87 Difference]: Start difference. First operand 1130 states and 4099 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:46,926 INFO L93 Difference]: Finished difference Result 1632 states and 5515 transitions. [2021-10-07 15:49:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-07 15:49:46,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:49:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:46,932 INFO L225 Difference]: With dead ends: 1632 [2021-10-07 15:49:46,932 INFO L226 Difference]: Without dead ends: 1622 [2021-10-07 15:49:46,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 3481.0ms TimeCoverageRelationStatistics Valid=486, Invalid=1584, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:49:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-10-07 15:49:46,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1144. [2021-10-07 15:49:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.6325459317585302) internal successors, (4152), 1143 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 4152 transitions. [2021-10-07 15:49:46,963 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 4152 transitions. Word has length 18 [2021-10-07 15:49:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:46,963 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 4152 transitions. [2021-10-07 15:49:46,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 4152 transitions. [2021-10-07 15:49:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:49:46,966 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:46,966 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:49:46,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (132)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:47,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:47,166 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:47,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1711680364, now seen corresponding path program 114 times [2021-10-07 15:49:47,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:47,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782422817] [2021-10-07 15:49:47,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:49:47,168 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:47,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:47,170 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:47,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2021-10-07 15:49:48,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:49:48,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:49:48,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:49:48,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:48,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:48,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:48,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782422817] [2021-10-07 15:49:48,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782422817] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:48,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:48,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:49:48,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987507279] [2021-10-07 15:49:48,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:49:48,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:48,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:49:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:49:48,944 INFO L87 Difference]: Start difference. First operand 1144 states and 4152 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:51,397 INFO L93 Difference]: Finished difference Result 1346 states and 4600 transitions. [2021-10-07 15:49:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:49:51,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:49:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:51,400 INFO L225 Difference]: With dead ends: 1346 [2021-10-07 15:49:51,400 INFO L226 Difference]: Without dead ends: 1346 [2021-10-07 15:49:51,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1915.4ms TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 15:49:51,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-10-07 15:49:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1148. [2021-10-07 15:49:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.6338273757628596) internal successors, (4168), 1147 states have internal predecessors, (4168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 4168 transitions. [2021-10-07 15:49:51,423 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 4168 transitions. Word has length 18 [2021-10-07 15:49:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:51,423 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 4168 transitions. [2021-10-07 15:49:51,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 4168 transitions. [2021-10-07 15:49:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:49:51,433 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:51,433 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:49:51,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (133)] Ended with exit code 0 [2021-10-07 15:49:51,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:51,641 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:51,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:51,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1588157927, now seen corresponding path program 115 times [2021-10-07 15:49:51,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:51,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550787277] [2021-10-07 15:49:51,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:49:51,643 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:51,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:51,645 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:51,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2021-10-07 15:49:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:49:52,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:49:52,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:52,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:53,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:53,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550787277] [2021-10-07 15:49:53,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550787277] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:53,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:53,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:49:53,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462140366] [2021-10-07 15:49:53,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:49:53,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:53,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:49:53,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:49:53,257 INFO L87 Difference]: Start difference. First operand 1148 states and 4168 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:54,620 INFO L93 Difference]: Finished difference Result 1230 states and 4357 transitions. [2021-10-07 15:49:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:49:54,621 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:49:54,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:54,624 INFO L225 Difference]: With dead ends: 1230 [2021-10-07 15:49:54,625 INFO L226 Difference]: Without dead ends: 1214 [2021-10-07 15:49:54,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1081.3ms TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:49:54,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-10-07 15:49:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1148. [2021-10-07 15:49:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.6303400174367915) internal successors, (4164), 1147 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 4164 transitions. [2021-10-07 15:49:54,665 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 4164 transitions. Word has length 18 [2021-10-07 15:49:54,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:54,666 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 4164 transitions. [2021-10-07 15:49:54,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 4164 transitions. [2021-10-07 15:49:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:49:54,670 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:54,670 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:49:54,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (134)] Forceful destruction successful, exit code 0 [2021-10-07 15:49:54,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:54,883 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:54,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1693246338, now seen corresponding path program 116 times [2021-10-07 15:49:54,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:54,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101592371] [2021-10-07 15:49:54,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:49:54,885 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:54,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:54,887 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:54,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2021-10-07 15:49:56,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:49:56,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:49:56,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:49:56,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:56,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:56,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:56,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101592371] [2021-10-07 15:49:56,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101592371] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:56,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:56,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:49:56,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43157860] [2021-10-07 15:49:56,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:49:56,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:56,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:49:56,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:49:56,465 INFO L87 Difference]: Start difference. First operand 1148 states and 4164 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:49:57,597 INFO L93 Difference]: Finished difference Result 1318 states and 4525 transitions. [2021-10-07 15:49:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:49:57,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:49:57,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:49:57,600 INFO L225 Difference]: With dead ends: 1318 [2021-10-07 15:49:57,600 INFO L226 Difference]: Without dead ends: 1318 [2021-10-07 15:49:57,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 686.5ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:49:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-10-07 15:49:57,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1140. [2021-10-07 15:49:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.629499561018437) internal successors, (4134), 1139 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 4134 transitions. [2021-10-07 15:49:57,633 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 4134 transitions. Word has length 18 [2021-10-07 15:49:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:49:57,634 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 4134 transitions. [2021-10-07 15:49:57,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:49:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 4134 transitions. [2021-10-07 15:49:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:49:57,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:49:57,636 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:49:57,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (135)] Ended with exit code 0 [2021-10-07 15:49:57,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:49:57,837 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:49:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:49:57,838 INFO L82 PathProgramCache]: Analyzing trace with hash 554374087, now seen corresponding path program 117 times [2021-10-07 15:49:57,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:49:57,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987138529] [2021-10-07 15:49:57,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:49:57,839 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:49:57,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:49:57,840 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:49:57,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2021-10-07 15:49:59,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:49:59,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:49:59,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 15:49:59,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:49:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:59,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:49:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:49:59,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:49:59,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987138529] [2021-10-07 15:49:59,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987138529] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:49:59,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:49:59,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:49:59,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502319226] [2021-10-07 15:49:59,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:49:59,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:49:59,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:49:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:49:59,872 INFO L87 Difference]: Start difference. First operand 1140 states and 4134 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:06,932 INFO L93 Difference]: Finished difference Result 1362 states and 4621 transitions. [2021-10-07 15:50:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-07 15:50:06,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:50:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:06,937 INFO L225 Difference]: With dead ends: 1362 [2021-10-07 15:50:06,937 INFO L226 Difference]: Without dead ends: 1362 [2021-10-07 15:50:06,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 5886.6ms TimeCoverageRelationStatistics Valid=608, Invalid=2472, Unknown=0, NotChecked=0, Total=3080 [2021-10-07 15:50:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-10-07 15:50:06,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1160. [2021-10-07 15:50:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 3.61518550474547) internal successors, (4190), 1159 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 4190 transitions. [2021-10-07 15:50:06,960 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 4190 transitions. Word has length 18 [2021-10-07 15:50:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:06,960 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 4190 transitions. [2021-10-07 15:50:06,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 4190 transitions. [2021-10-07 15:50:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:50:06,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:06,962 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:50:06,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (136)] Ended with exit code 0 [2021-10-07 15:50:07,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:07,163 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:50:07,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:07,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1457355106, now seen corresponding path program 118 times [2021-10-07 15:50:07,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:07,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838215487] [2021-10-07 15:50:07,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:50:07,165 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:07,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:07,166 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:07,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2021-10-07 15:50:08,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:50:08,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:50:08,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:50:08,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:08,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:08,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:08,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838215487] [2021-10-07 15:50:08,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838215487] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:50:08,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:50:08,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:50:08,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890731721] [2021-10-07 15:50:08,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:50:08,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:08,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:50:08,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:50:08,926 INFO L87 Difference]: Start difference. First operand 1160 states and 4190 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:10,105 INFO L93 Difference]: Finished difference Result 1208 states and 4276 transitions. [2021-10-07 15:50:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:50:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:50:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:10,109 INFO L225 Difference]: With dead ends: 1208 [2021-10-07 15:50:10,109 INFO L226 Difference]: Without dead ends: 1196 [2021-10-07 15:50:10,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 879.1ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:50:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-10-07 15:50:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1160. [2021-10-07 15:50:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 3.6082830025884385) internal successors, (4182), 1159 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 4182 transitions. [2021-10-07 15:50:10,131 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 4182 transitions. Word has length 18 [2021-10-07 15:50:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:10,131 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 4182 transitions. [2021-10-07 15:50:10,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 4182 transitions. [2021-10-07 15:50:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:50:10,133 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:10,134 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:50:10,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (137)] Ended with exit code 0 [2021-10-07 15:50:10,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:10,334 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:50:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:10,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1583207617, now seen corresponding path program 119 times [2021-10-07 15:50:10,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:10,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502689234] [2021-10-07 15:50:10,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:50:10,336 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:10,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:10,338 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:10,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2021-10-07 15:50:11,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:50:11,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:50:11,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:50:11,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:11,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:12,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:12,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502689234] [2021-10-07 15:50:12,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502689234] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:50:12,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:50:12,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:50:12,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233550364] [2021-10-07 15:50:12,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:50:12,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:12,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:50:12,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:50:12,118 INFO L87 Difference]: Start difference. First operand 1160 states and 4182 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:15,853 INFO L93 Difference]: Finished difference Result 1362 states and 4669 transitions. [2021-10-07 15:50:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 15:50:15,855 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:50:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:15,858 INFO L225 Difference]: With dead ends: 1362 [2021-10-07 15:50:15,858 INFO L226 Difference]: Without dead ends: 1362 [2021-10-07 15:50:15,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3240.4ms TimeCoverageRelationStatistics Valid=333, Invalid=999, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:50:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-10-07 15:50:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1168. [2021-10-07 15:50:15,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.610968294772922) internal successors, (4214), 1167 states have internal predecessors, (4214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:15,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 4214 transitions. [2021-10-07 15:50:15,883 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 4214 transitions. Word has length 18 [2021-10-07 15:50:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:15,883 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 4214 transitions. [2021-10-07 15:50:15,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 4214 transitions. [2021-10-07 15:50:15,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:50:15,886 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:15,886 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:50:15,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (138)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:16,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:16,087 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:50:16,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:16,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1583802263, now seen corresponding path program 120 times [2021-10-07 15:50:16,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:16,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353580710] [2021-10-07 15:50:16,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:50:16,088 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:16,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:16,090 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:16,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2021-10-07 15:50:17,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:50:17,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:50:17,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 15:50:17,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:17,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:18,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:18,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353580710] [2021-10-07 15:50:18,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353580710] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:50:18,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:50:18,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-07 15:50:18,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30482046] [2021-10-07 15:50:18,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:50:18,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:50:18,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:50:18,258 INFO L87 Difference]: Start difference. First operand 1168 states and 4214 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:37,935 INFO L93 Difference]: Finished difference Result 1702 states and 5583 transitions. [2021-10-07 15:50:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-07 15:50:37,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:50:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:37,940 INFO L225 Difference]: With dead ends: 1702 [2021-10-07 15:50:37,940 INFO L226 Difference]: Without dead ends: 1696 [2021-10-07 15:50:37,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 16880.0ms TimeCoverageRelationStatistics Valid=601, Invalid=2479, Unknown=0, NotChecked=0, Total=3080 [2021-10-07 15:50:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-10-07 15:50:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1324. [2021-10-07 15:50:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.6455026455026456) internal successors, (4823), 1323 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4823 transitions. [2021-10-07 15:50:37,966 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4823 transitions. Word has length 18 [2021-10-07 15:50:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:37,966 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 4823 transitions. [2021-10-07 15:50:37,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4823 transitions. [2021-10-07 15:50:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:50:37,969 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:37,970 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:50:37,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (139)] Ended with exit code 0 [2021-10-07 15:50:38,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:38,170 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:50:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash -844207375, now seen corresponding path program 121 times [2021-10-07 15:50:38,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:38,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773146098] [2021-10-07 15:50:38,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:50:38,172 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:38,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:38,174 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:38,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2021-10-07 15:50:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:50:39,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:50:39,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:39,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:40,005 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:40,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773146098] [2021-10-07 15:50:40,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773146098] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:50:40,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:50:40,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:50:40,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635321221] [2021-10-07 15:50:40,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:50:40,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:40,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:50:40,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:50:40,006 INFO L87 Difference]: Start difference. First operand 1324 states and 4823 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:46,158 INFO L93 Difference]: Finished difference Result 1622 states and 5555 transitions. [2021-10-07 15:50:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-07 15:50:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:50:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:46,164 INFO L225 Difference]: With dead ends: 1622 [2021-10-07 15:50:46,164 INFO L226 Difference]: Without dead ends: 1620 [2021-10-07 15:50:46,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 4740.9ms TimeCoverageRelationStatistics Valid=465, Invalid=1341, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 15:50:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-10-07 15:50:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1360. [2021-10-07 15:50:46,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 3.6607799852832965) internal successors, (4975), 1359 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4975 transitions. [2021-10-07 15:50:46,209 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4975 transitions. Word has length 18 [2021-10-07 15:50:46,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:46,209 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 4975 transitions. [2021-10-07 15:50:46,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:46,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4975 transitions. [2021-10-07 15:50:46,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:50:46,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:46,214 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:50:46,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (140)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:46,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:46,427 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:50:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:46,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1048572461, now seen corresponding path program 122 times [2021-10-07 15:50:46,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:46,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099301509] [2021-10-07 15:50:46,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:50:46,429 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:46,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:46,431 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:46,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2021-10-07 15:50:47,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:50:47,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:50:47,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:50:47,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:47,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:48,258 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:48,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099301509] [2021-10-07 15:50:48,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099301509] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:50:48,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:50:48,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-07 15:50:48,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601144479] [2021-10-07 15:50:48,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:50:48,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:48,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:50:48,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:50:48,260 INFO L87 Difference]: Start difference. First operand 1360 states and 4975 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:50:51,939 INFO L93 Difference]: Finished difference Result 1504 states and 5328 transitions. [2021-10-07 15:50:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:50:51,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:50:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:50:51,944 INFO L225 Difference]: With dead ends: 1504 [2021-10-07 15:50:51,944 INFO L226 Difference]: Without dead ends: 1500 [2021-10-07 15:50:51,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2625.1ms TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 15:50:51,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-10-07 15:50:51,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1378. [2021-10-07 15:50:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.663035584604212) internal successors, (5044), 1377 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:51,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 5044 transitions. [2021-10-07 15:50:51,974 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 5044 transitions. Word has length 18 [2021-10-07 15:50:51,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:50:51,974 INFO L470 AbstractCegarLoop]: Abstraction has 1378 states and 5044 transitions. [2021-10-07 15:50:51,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:50:51,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 5044 transitions. [2021-10-07 15:50:51,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:50:51,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:50:51,977 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:50:51,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (141)] Forceful destruction successful, exit code 0 [2021-10-07 15:50:52,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:50:52,178 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:50:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:50:52,178 INFO L82 PathProgramCache]: Analyzing trace with hash -476523009, now seen corresponding path program 123 times [2021-10-07 15:50:52,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:50:52,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496312734] [2021-10-07 15:50:52,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:50:52,180 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:50:52,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:50:52,181 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:50:52,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2021-10-07 15:50:53,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:50:53,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:50:53,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 15:50:53,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:50:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:53,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:50:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:50:54,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:50:54,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496312734] [2021-10-07 15:50:54,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496312734] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:50:54,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:50:54,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-07 15:50:54,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145956057] [2021-10-07 15:50:54,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:50:54,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:50:54,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:50:54,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:50:54,312 INFO L87 Difference]: Start difference. First operand 1378 states and 5044 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:04,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:51:04,244 INFO L93 Difference]: Finished difference Result 1814 states and 5961 transitions. [2021-10-07 15:51:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-07 15:51:04,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:51:04,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:51:04,249 INFO L225 Difference]: With dead ends: 1814 [2021-10-07 15:51:04,250 INFO L226 Difference]: Without dead ends: 1814 [2021-10-07 15:51:04,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 8409.8ms TimeCoverageRelationStatistics Valid=631, Invalid=2561, Unknown=0, NotChecked=0, Total=3192 [2021-10-07 15:51:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-10-07 15:51:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1406. [2021-10-07 15:51:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1405 states have (on average 3.671174377224199) internal successors, (5158), 1405 states have internal predecessors, (5158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 5158 transitions. [2021-10-07 15:51:04,278 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 5158 transitions. Word has length 18 [2021-10-07 15:51:04,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:51:04,278 INFO L470 AbstractCegarLoop]: Abstraction has 1406 states and 5158 transitions. [2021-10-07 15:51:04,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 5158 transitions. [2021-10-07 15:51:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:51:04,281 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:51:04,281 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:51:04,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (142)] Ended with exit code 0 [2021-10-07 15:51:04,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:51:04,482 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:51:04,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:51:04,483 INFO L82 PathProgramCache]: Analyzing trace with hash -477117655, now seen corresponding path program 124 times [2021-10-07 15:51:04,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:51:04,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933019672] [2021-10-07 15:51:04,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:51:04,484 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:51:04,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:51:04,486 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:51:04,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2021-10-07 15:51:05,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:51:05,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:51:05,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:51:05,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:51:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:05,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:06,128 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:06,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933019672] [2021-10-07 15:51:06,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933019672] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:06,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:06,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:51:06,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624415836] [2021-10-07 15:51:06,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:51:06,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:06,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:51:06,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:51:06,130 INFO L87 Difference]: Start difference. First operand 1406 states and 5158 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:51:09,201 INFO L93 Difference]: Finished difference Result 1572 states and 5509 transitions. [2021-10-07 15:51:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 15:51:09,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:51:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:51:09,206 INFO L225 Difference]: With dead ends: 1572 [2021-10-07 15:51:09,206 INFO L226 Difference]: Without dead ends: 1558 [2021-10-07 15:51:09,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1954.2ms TimeCoverageRelationStatistics Valid=340, Invalid=992, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:51:09,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-10-07 15:51:09,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1412. [2021-10-07 15:51:09,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.666194188518781) internal successors, (5173), 1411 states have internal predecessors, (5173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 5173 transitions. [2021-10-07 15:51:09,232 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 5173 transitions. Word has length 18 [2021-10-07 15:51:09,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:51:09,232 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 5173 transitions. [2021-10-07 15:51:09,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 5173 transitions. [2021-10-07 15:51:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:51:09,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:51:09,235 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:51:09,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (143)] Forceful destruction successful, exit code 0 [2021-10-07 15:51:09,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:51:09,436 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:51:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:51:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash -495551681, now seen corresponding path program 125 times [2021-10-07 15:51:09,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:51:09,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239938954] [2021-10-07 15:51:09,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:51:09,438 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:51:09,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:51:09,439 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:51:09,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2021-10-07 15:51:10,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:51:10,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:51:10,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:51:10,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:51:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:10,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:11,223 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:11,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239938954] [2021-10-07 15:51:11,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239938954] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:11,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:11,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:51:11,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133990451] [2021-10-07 15:51:11,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:51:11,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:11,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:51:11,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:51:11,224 INFO L87 Difference]: Start difference. First operand 1412 states and 5173 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:51:14,345 INFO L93 Difference]: Finished difference Result 1522 states and 5389 transitions. [2021-10-07 15:51:14,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:51:14,346 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:51:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:51:14,350 INFO L225 Difference]: With dead ends: 1522 [2021-10-07 15:51:14,350 INFO L226 Difference]: Without dead ends: 1506 [2021-10-07 15:51:14,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2357.6ms TimeCoverageRelationStatistics Valid=299, Invalid=1033, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:51:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-10-07 15:51:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1416. [2021-10-07 15:51:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.6607773851590104) internal successors, (5180), 1415 states have internal predecessors, (5180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 5180 transitions. [2021-10-07 15:51:14,377 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 5180 transitions. Word has length 18 [2021-10-07 15:51:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:51:14,377 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 5180 transitions. [2021-10-07 15:51:14,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 5180 transitions. [2021-10-07 15:51:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:51:14,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:51:14,380 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:51:14,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (144)] Ended with exit code 0 [2021-10-07 15:51:14,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:51:14,594 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:51:14,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:51:14,594 INFO L82 PathProgramCache]: Analyzing trace with hash -396869652, now seen corresponding path program 126 times [2021-10-07 15:51:14,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:51:14,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482331965] [2021-10-07 15:51:14,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:51:14,595 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:51:14,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:51:14,597 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:51:14,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2021-10-07 15:51:15,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:51:15,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:51:15,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 15:51:15,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:51:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:15,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:16,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:16,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482331965] [2021-10-07 15:51:16,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482331965] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:16,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:16,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-07 15:51:16,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611078876] [2021-10-07 15:51:16,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:51:16,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:16,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:51:16,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:51:16,484 INFO L87 Difference]: Start difference. First operand 1416 states and 5180 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:51:24,193 INFO L93 Difference]: Finished difference Result 1742 states and 5933 transitions. [2021-10-07 15:51:24,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 15:51:24,194 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:51:24,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:51:24,198 INFO L225 Difference]: With dead ends: 1742 [2021-10-07 15:51:24,198 INFO L226 Difference]: Without dead ends: 1742 [2021-10-07 15:51:24,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 6501.2ms TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 15:51:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-10-07 15:51:24,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1484. [2021-10-07 15:51:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 3.684423465947404) internal successors, (5464), 1483 states have internal predecessors, (5464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 5464 transitions. [2021-10-07 15:51:24,227 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 5464 transitions. Word has length 18 [2021-10-07 15:51:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:51:24,227 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 5464 transitions. [2021-10-07 15:51:24,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 5464 transitions. [2021-10-07 15:51:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:51:24,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:51:24,230 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:51:24,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (145)] Forceful destruction successful, exit code 0 [2021-10-07 15:51:24,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:51:24,431 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:51:24,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:51:24,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1983922105, now seen corresponding path program 127 times [2021-10-07 15:51:24,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:51:24,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146700671] [2021-10-07 15:51:24,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:51:24,433 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:51:24,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:51:24,434 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:51:24,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2021-10-07 15:51:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:51:25,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:51:25,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:51:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:25,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:26,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:26,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146700671] [2021-10-07 15:51:26,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146700671] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:26,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:26,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:51:26,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903057940] [2021-10-07 15:51:26,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:51:26,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:26,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:51:26,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:51:26,273 INFO L87 Difference]: Start difference. First operand 1484 states and 5464 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:51:29,901 INFO L93 Difference]: Finished difference Result 1748 states and 6053 transitions. [2021-10-07 15:51:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-07 15:51:29,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:51:29,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:51:29,905 INFO L225 Difference]: With dead ends: 1748 [2021-10-07 15:51:29,905 INFO L226 Difference]: Without dead ends: 1748 [2021-10-07 15:51:29,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2877.8ms TimeCoverageRelationStatistics Valid=401, Invalid=1491, Unknown=0, NotChecked=0, Total=1892 [2021-10-07 15:51:29,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-10-07 15:51:29,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1506. [2021-10-07 15:51:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.687043189368771) internal successors, (5549), 1505 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5549 transitions. [2021-10-07 15:51:29,953 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5549 transitions. Word has length 18 [2021-10-07 15:51:29,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:51:29,953 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 5549 transitions. [2021-10-07 15:51:29,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:29,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5549 transitions. [2021-10-07 15:51:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:51:29,958 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:51:29,958 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:51:29,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (146)] Forceful destruction successful, exit code 0 [2021-10-07 15:51:30,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:51:30,172 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:51:30,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:51:30,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1635723137, now seen corresponding path program 128 times [2021-10-07 15:51:30,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:51:30,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963494418] [2021-10-07 15:51:30,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:51:30,174 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:51:30,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:51:30,175 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:51:30,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2021-10-07 15:51:31,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:51:31,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:51:31,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:51:31,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:51:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:31,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:31,927 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:31,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963494418] [2021-10-07 15:51:31,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963494418] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:31,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:31,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:51:31,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535597762] [2021-10-07 15:51:31,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:51:31,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:31,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:51:31,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:51:31,930 INFO L87 Difference]: Start difference. First operand 1506 states and 5549 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:34,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:51:34,581 INFO L93 Difference]: Finished difference Result 1798 states and 6251 transitions. [2021-10-07 15:51:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:51:34,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:51:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:51:34,586 INFO L225 Difference]: With dead ends: 1798 [2021-10-07 15:51:34,586 INFO L226 Difference]: Without dead ends: 1798 [2021-10-07 15:51:34,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2286.9ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 15:51:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-10-07 15:51:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1526. [2021-10-07 15:51:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 3.6924590163934425) internal successors, (5631), 1525 states have internal predecessors, (5631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 5631 transitions. [2021-10-07 15:51:34,617 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 5631 transitions. Word has length 18 [2021-10-07 15:51:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:51:34,617 INFO L470 AbstractCegarLoop]: Abstraction has 1526 states and 5631 transitions. [2021-10-07 15:51:34,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 5631 transitions. [2021-10-07 15:51:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:51:34,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:51:34,629 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:51:34,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (147)] Ended with exit code 0 [2021-10-07 15:51:34,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:51:34,830 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:51:34,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:51:34,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1636317783, now seen corresponding path program 129 times [2021-10-07 15:51:34,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:51:34,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365461792] [2021-10-07 15:51:34,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:51:34,832 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:51:34,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:51:34,833 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:51:34,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (148)] Waiting until timeout for monitored process [2021-10-07 15:51:36,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:51:36,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:51:36,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:51:36,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:51:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:36,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:36,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:36,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365461792] [2021-10-07 15:51:36,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365461792] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:36,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:36,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:51:36,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203442155] [2021-10-07 15:51:36,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:51:36,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:36,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:51:36,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:51:36,706 INFO L87 Difference]: Start difference. First operand 1526 states and 5631 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:51:39,905 INFO L93 Difference]: Finished difference Result 1702 states and 6059 transitions. [2021-10-07 15:51:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:51:39,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:51:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:51:39,910 INFO L225 Difference]: With dead ends: 1702 [2021-10-07 15:51:39,910 INFO L226 Difference]: Without dead ends: 1692 [2021-10-07 15:51:39,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2541.9ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:51:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-10-07 15:51:39,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1520. [2021-10-07 15:51:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.6879526003949965) internal successors, (5602), 1519 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5602 transitions. [2021-10-07 15:51:39,939 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5602 transitions. Word has length 18 [2021-10-07 15:51:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:51:39,939 INFO L470 AbstractCegarLoop]: Abstraction has 1520 states and 5602 transitions. [2021-10-07 15:51:39,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:39,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5602 transitions. [2021-10-07 15:51:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:51:39,942 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:51:39,942 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:51:39,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (148)] Forceful destruction successful, exit code 0 [2021-10-07 15:51:40,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:51:40,142 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:51:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:51:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1778274246, now seen corresponding path program 130 times [2021-10-07 15:51:40,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:51:40,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593633086] [2021-10-07 15:51:40,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:51:40,144 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:51:40,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:51:40,146 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:51:40,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2021-10-07 15:51:41,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:51:41,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:51:41,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:51:41,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:51:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:41,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:42,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:42,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593633086] [2021-10-07 15:51:42,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593633086] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:42,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:42,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:51:42,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974618068] [2021-10-07 15:51:42,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:51:42,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:51:42,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:51:42,172 INFO L87 Difference]: Start difference. First operand 1520 states and 5602 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:48,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:51:48,155 INFO L93 Difference]: Finished difference Result 1816 states and 6223 transitions. [2021-10-07 15:51:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-07 15:51:48,156 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:51:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:51:48,161 INFO L225 Difference]: With dead ends: 1816 [2021-10-07 15:51:48,161 INFO L226 Difference]: Without dead ends: 1816 [2021-10-07 15:51:48,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 4504.6ms TimeCoverageRelationStatistics Valid=421, Invalid=1471, Unknown=0, NotChecked=0, Total=1892 [2021-10-07 15:51:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-10-07 15:51:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1556. [2021-10-07 15:51:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 3.6990353697749194) internal successors, (5752), 1555 states have internal predecessors, (5752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5752 transitions. [2021-10-07 15:51:48,192 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5752 transitions. Word has length 18 [2021-10-07 15:51:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:51:48,192 INFO L470 AbstractCegarLoop]: Abstraction has 1556 states and 5752 transitions. [2021-10-07 15:51:48,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5752 transitions. [2021-10-07 15:51:48,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:51:48,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:51:48,196 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:51:48,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (149)] Forceful destruction successful, exit code 0 [2021-10-07 15:51:48,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:51:48,396 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:51:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:51:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1863707468, now seen corresponding path program 131 times [2021-10-07 15:51:48,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:51:48,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996914536] [2021-10-07 15:51:48,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:51:48,398 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:51:48,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:51:48,399 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:51:48,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2021-10-07 15:51:49,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:51:49,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:51:49,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:51:49,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:51:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:49,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:50,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:50,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996914536] [2021-10-07 15:51:50,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996914536] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:50,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:50,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:51:50,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330190466] [2021-10-07 15:51:50,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:51:50,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:51:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:51:50,448 INFO L87 Difference]: Start difference. First operand 1556 states and 5752 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:54,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:51:54,578 INFO L93 Difference]: Finished difference Result 1746 states and 6241 transitions. [2021-10-07 15:51:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:51:54,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:51:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:51:54,583 INFO L225 Difference]: With dead ends: 1746 [2021-10-07 15:51:54,583 INFO L226 Difference]: Without dead ends: 1740 [2021-10-07 15:51:54,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 3693.4ms TimeCoverageRelationStatistics Valid=348, Invalid=984, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:51:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2021-10-07 15:51:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1616. [2021-10-07 15:51:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 3.7151702786377707) internal successors, (6000), 1615 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 6000 transitions. [2021-10-07 15:51:54,632 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 6000 transitions. Word has length 18 [2021-10-07 15:51:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:51:54,632 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 6000 transitions. [2021-10-07 15:51:54,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:51:54,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 6000 transitions. [2021-10-07 15:51:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:51:54,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:51:54,636 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:51:54,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (150)] Ended with exit code 0 [2021-10-07 15:51:54,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:51:54,837 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:51:54,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:51:54,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1206819440, now seen corresponding path program 132 times [2021-10-07 15:51:54,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:51:54,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725503614] [2021-10-07 15:51:54,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:51:54,839 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:51:54,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:51:54,840 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:51:54,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2021-10-07 15:51:56,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:51:56,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:51:56,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:51:56,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:51:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:56,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:51:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:51:56,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:51:56,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725503614] [2021-10-07 15:51:56,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725503614] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:51:56,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:51:56,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:51:56,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064540076] [2021-10-07 15:51:56,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:51:56,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:51:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:51:56,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:51:56,895 INFO L87 Difference]: Start difference. First operand 1616 states and 6000 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:02,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:52:02,110 INFO L93 Difference]: Finished difference Result 1854 states and 6512 transitions. [2021-10-07 15:52:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-07 15:52:02,112 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:52:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:52:02,117 INFO L225 Difference]: With dead ends: 1854 [2021-10-07 15:52:02,117 INFO L226 Difference]: Without dead ends: 1854 [2021-10-07 15:52:02,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 3831.4ms TimeCoverageRelationStatistics Valid=361, Invalid=1199, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:52:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-10-07 15:52:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1636. [2021-10-07 15:52:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 3.7198776758409786) internal successors, (6082), 1635 states have internal predecessors, (6082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 6082 transitions. [2021-10-07 15:52:02,149 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 6082 transitions. Word has length 18 [2021-10-07 15:52:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:52:02,150 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 6082 transitions. [2021-10-07 15:52:02,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 6082 transitions. [2021-10-07 15:52:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:52:02,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:52:02,154 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:52:02,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (151)] Ended with exit code 0 [2021-10-07 15:52:02,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:52:02,368 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:52:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:52:02,369 INFO L82 PathProgramCache]: Analyzing trace with hash -529038529, now seen corresponding path program 133 times [2021-10-07 15:52:02,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:52:02,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273909649] [2021-10-07 15:52:02,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:52:02,370 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:52:02,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:52:02,372 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:52:02,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2021-10-07 15:52:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:52:03,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:52:03,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:52:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:03,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:52:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:04,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:52:04,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273909649] [2021-10-07 15:52:04,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273909649] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:52:04,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:52:04,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:52:04,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115443048] [2021-10-07 15:52:04,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:52:04,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:52:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:52:04,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:52:04,238 INFO L87 Difference]: Start difference. First operand 1636 states and 6082 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:52:06,466 INFO L93 Difference]: Finished difference Result 1916 states and 6712 transitions. [2021-10-07 15:52:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:52:06,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:52:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:52:06,471 INFO L225 Difference]: With dead ends: 1916 [2021-10-07 15:52:06,471 INFO L226 Difference]: Without dead ends: 1916 [2021-10-07 15:52:06,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1540.7ms TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2021-10-07 15:52:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-10-07 15:52:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1642. [2021-10-07 15:52:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 3.7215112736136504) internal successors, (6107), 1641 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 6107 transitions. [2021-10-07 15:52:06,510 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 6107 transitions. Word has length 18 [2021-10-07 15:52:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:52:06,510 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 6107 transitions. [2021-10-07 15:52:06,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 6107 transitions. [2021-10-07 15:52:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:52:06,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:52:06,514 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:52:06,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (152)] Forceful destruction successful, exit code 0 [2021-10-07 15:52:06,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:52:06,715 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:52:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:52:06,716 INFO L82 PathProgramCache]: Analyzing trace with hash -529633175, now seen corresponding path program 134 times [2021-10-07 15:52:06,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:52:06,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542065707] [2021-10-07 15:52:06,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:52:06,717 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:52:06,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:52:06,718 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:52:06,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2021-10-07 15:52:08,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:52:08,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:52:08,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:52:08,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:52:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:08,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:52:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:08,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:52:08,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542065707] [2021-10-07 15:52:08,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542065707] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:52:08,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:52:08,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:52:08,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553593299] [2021-10-07 15:52:08,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:52:08,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:52:08,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:52:08,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:52:08,581 INFO L87 Difference]: Start difference. First operand 1642 states and 6107 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:10,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:52:10,796 INFO L93 Difference]: Finished difference Result 1850 states and 6601 transitions. [2021-10-07 15:52:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 15:52:10,797 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:52:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:52:10,802 INFO L225 Difference]: With dead ends: 1850 [2021-10-07 15:52:10,802 INFO L226 Difference]: Without dead ends: 1840 [2021-10-07 15:52:10,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1472.8ms TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:52:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-10-07 15:52:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1642. [2021-10-07 15:52:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 3.717854966483851) internal successors, (6101), 1641 states have internal predecessors, (6101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 6101 transitions. [2021-10-07 15:52:10,839 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 6101 transitions. Word has length 18 [2021-10-07 15:52:10,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:52:10,839 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 6101 transitions. [2021-10-07 15:52:10,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:10,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 6101 transitions. [2021-10-07 15:52:10,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:52:10,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:52:10,844 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:52:10,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (153)] Forceful destruction successful, exit code 0 [2021-10-07 15:52:11,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:52:11,059 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:52:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:52:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash -671589638, now seen corresponding path program 135 times [2021-10-07 15:52:11,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:52:11,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427188683] [2021-10-07 15:52:11,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:52:11,062 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:52:11,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:52:11,063 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:52:11,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (154)] Waiting until timeout for monitored process [2021-10-07 15:52:12,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:52:12,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:52:12,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-07 15:52:12,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:52:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:12,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:52:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:13,313 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:52:13,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427188683] [2021-10-07 15:52:13,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427188683] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:52:13,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:52:13,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-07 15:52:13,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12975346] [2021-10-07 15:52:13,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:52:13,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:52:13,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:52:13,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:52:13,315 INFO L87 Difference]: Start difference. First operand 1642 states and 6101 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:19,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:52:19,201 INFO L93 Difference]: Finished difference Result 1888 states and 6604 transitions. [2021-10-07 15:52:19,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:52:19,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:52:19,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:52:19,207 INFO L225 Difference]: With dead ends: 1888 [2021-10-07 15:52:19,207 INFO L226 Difference]: Without dead ends: 1888 [2021-10-07 15:52:19,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4664.6ms TimeCoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:52:19,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-10-07 15:52:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1664. [2021-10-07 15:52:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 3.723391461214672) internal successors, (6192), 1663 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 6192 transitions. [2021-10-07 15:52:19,244 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 6192 transitions. Word has length 18 [2021-10-07 15:52:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:52:19,244 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 6192 transitions. [2021-10-07 15:52:19,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:19,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 6192 transitions. [2021-10-07 15:52:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:52:19,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:52:19,248 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:52:19,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (154)] Ended with exit code 0 [2021-10-07 15:52:19,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:52:19,449 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:52:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:52:19,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1119522007, now seen corresponding path program 136 times [2021-10-07 15:52:19,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:52:19,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039430360] [2021-10-07 15:52:19,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:52:19,451 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:52:19,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:52:19,452 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:52:19,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2021-10-07 15:52:20,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:52:20,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:52:20,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 15:52:20,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:52:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:20,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:52:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:21,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:52:21,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039430360] [2021-10-07 15:52:21,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039430360] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:52:21,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:52:21,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:52:21,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141396734] [2021-10-07 15:52:21,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:52:21,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:52:21,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:52:21,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:52:21,229 INFO L87 Difference]: Start difference. First operand 1664 states and 6192 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:52:21,983 INFO L93 Difference]: Finished difference Result 1758 states and 6415 transitions. [2021-10-07 15:52:21,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:52:21,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:52:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:52:21,989 INFO L225 Difference]: With dead ends: 1758 [2021-10-07 15:52:21,989 INFO L226 Difference]: Without dead ends: 1734 [2021-10-07 15:52:21,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 610.6ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:52:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-10-07 15:52:22,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1664. [2021-10-07 15:52:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 3.719783523752255) internal successors, (6186), 1663 states have internal predecessors, (6186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:22,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 6186 transitions. [2021-10-07 15:52:22,034 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 6186 transitions. Word has length 18 [2021-10-07 15:52:22,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:52:22,035 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 6186 transitions. [2021-10-07 15:52:22,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 6186 transitions. [2021-10-07 15:52:22,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:52:22,038 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:52:22,038 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:52:22,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (155)] Forceful destruction successful, exit code 0 [2021-10-07 15:52:22,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:52:22,239 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:52:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:52:22,240 INFO L82 PathProgramCache]: Analyzing trace with hash 122069634, now seen corresponding path program 137 times [2021-10-07 15:52:22,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:52:22,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455303038] [2021-10-07 15:52:22,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:52:22,241 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:52:22,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:52:22,243 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:52:22,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2021-10-07 15:52:23,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:52:23,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:52:23,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:52:23,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:52:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:23,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:52:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:23,990 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:52:23,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455303038] [2021-10-07 15:52:23,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455303038] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:52:23,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:52:23,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-07 15:52:23,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779828291] [2021-10-07 15:52:23,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:52:23,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:52:23,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:52:23,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:52:23,992 INFO L87 Difference]: Start difference. First operand 1664 states and 6186 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:26,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:52:26,919 INFO L93 Difference]: Finished difference Result 1916 states and 6809 transitions. [2021-10-07 15:52:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:52:26,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:52:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:52:26,925 INFO L225 Difference]: With dead ends: 1916 [2021-10-07 15:52:26,926 INFO L226 Difference]: Without dead ends: 1916 [2021-10-07 15:52:26,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1541.5ms TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 15:52:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-10-07 15:52:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1672. [2021-10-07 15:52:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.7139437462597247) internal successors, (6206), 1671 states have internal predecessors, (6206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 6206 transitions. [2021-10-07 15:52:26,962 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 6206 transitions. Word has length 18 [2021-10-07 15:52:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:52:26,962 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 6206 transitions. [2021-10-07 15:52:26,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 6206 transitions. [2021-10-07 15:52:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:52:26,966 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:52:26,966 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:52:26,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (156)] Forceful destruction successful, exit code 0 [2021-10-07 15:52:27,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:52:27,169 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:52:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:52:27,170 INFO L82 PathProgramCache]: Analyzing trace with hash -860149385, now seen corresponding path program 138 times [2021-10-07 15:52:27,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:52:27,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171978534] [2021-10-07 15:52:27,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:52:27,171 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:52:27,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:52:27,172 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:52:27,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (157)] Waiting until timeout for monitored process [2021-10-07 15:52:29,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:52:29,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:52:29,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 15:52:29,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:52:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:31,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:52:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:52:39,571 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:52:39,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171978534] [2021-10-07 15:52:39,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171978534] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:52:39,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:52:39,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-07 15:52:39,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140856447] [2021-10-07 15:52:39,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-07 15:52:39,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:52:39,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-07 15:52:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=296, Unknown=2, NotChecked=0, Total=342 [2021-10-07 15:52:39,573 INFO L87 Difference]: Start difference. First operand 1672 states and 6206 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:52:47,451 WARN L207 SmtUtils]: Spent 7.68 s on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-10-07 15:53:04,997 WARN L207 SmtUtils]: Spent 16.16 s on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-10-07 15:53:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:53:09,093 INFO L93 Difference]: Finished difference Result 1978 states and 7027 transitions. [2021-10-07 15:53:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 15:53:09,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-07 15:53:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:53:09,099 INFO L225 Difference]: With dead ends: 1978 [2021-10-07 15:53:09,099 INFO L226 Difference]: Without dead ends: 1956 [2021-10-07 15:53:09,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 34807.2ms TimeCoverageRelationStatistics Valid=88, Invalid=560, Unknown=2, NotChecked=0, Total=650 [2021-10-07 15:53:09,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-10-07 15:53:09,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1810. [2021-10-07 15:53:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 3.712548369264787) internal successors, (6716), 1809 states have internal predecessors, (6716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:53:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 6716 transitions. [2021-10-07 15:53:09,154 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 6716 transitions. Word has length 19 [2021-10-07 15:53:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:53:09,154 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 6716 transitions. [2021-10-07 15:53:09,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:53:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 6716 transitions. [2021-10-07 15:53:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:53:09,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:53:09,158 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:53:09,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (157)] Ended with exit code 0 [2021-10-07 15:53:09,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:53:09,358 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:53:09,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:53:09,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1585027229, now seen corresponding path program 139 times [2021-10-07 15:53:09,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:53:09,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234400629] [2021-10-07 15:53:09,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:53:09,361 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:53:09,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:53:09,362 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:53:09,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (158)] Waiting until timeout for monitored process [2021-10-07 15:53:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:53:10,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 15:53:10,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:53:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:53:12,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:53:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:53:22,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:53:22,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234400629] [2021-10-07 15:53:22,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234400629] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:53:22,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:53:22,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-07 15:53:22,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399532172] [2021-10-07 15:53:22,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:53:22,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:53:22,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:53:22,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=327, Unknown=3, NotChecked=0, Total=380 [2021-10-07 15:53:22,106 INFO L87 Difference]: Start difference. First operand 1810 states and 6716 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:53:35,575 WARN L207 SmtUtils]: Spent 13.02 s on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-10-07 15:53:49,552 WARN L207 SmtUtils]: Spent 11.64 s on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-10-07 15:53:57,576 WARN L207 SmtUtils]: Spent 5.54 s on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-10-07 15:54:05,071 WARN L207 SmtUtils]: Spent 7.17 s on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-10-07 15:54:05,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:54:05,130 INFO L93 Difference]: Finished difference Result 1871 states and 6838 transitions. [2021-10-07 15:54:05,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:54:05,131 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-07 15:54:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:54:05,136 INFO L225 Difference]: With dead ends: 1871 [2021-10-07 15:54:05,136 INFO L226 Difference]: Without dead ends: 1866 [2021-10-07 15:54:05,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 47521.9ms TimeCoverageRelationStatistics Valid=78, Invalid=471, Unknown=3, NotChecked=0, Total=552 [2021-10-07 15:54:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-10-07 15:54:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1818. [2021-10-07 15:54:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.712713263621354) internal successors, (6746), 1817 states have internal predecessors, (6746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:54:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6746 transitions. [2021-10-07 15:54:05,176 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6746 transitions. Word has length 19 [2021-10-07 15:54:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:54:05,176 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 6746 transitions. [2021-10-07 15:54:05,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:54:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6746 transitions. [2021-10-07 15:54:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:54:05,180 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:54:05,180 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:54:05,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (158)] Ended with exit code 0 [2021-10-07 15:54:05,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:54:05,381 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:54:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:54:05,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1381256789, now seen corresponding path program 140 times [2021-10-07 15:54:05,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:54:05,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277447659] [2021-10-07 15:54:05,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:54:05,383 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:54:05,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:54:05,384 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:54:05,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (159)] Waiting until timeout for monitored process [2021-10-07 15:54:06,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:54:06,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:54:06,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 15:54:06,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:54:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:54:08,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:54:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:54:18,389 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:54:18,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277447659] [2021-10-07 15:54:18,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277447659] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:54:18,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:54:18,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-07 15:54:18,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146231965] [2021-10-07 15:54:18,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:54:18,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:54:18,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:54:18,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=327, Unknown=4, NotChecked=0, Total=380 [2021-10-07 15:54:18,391 INFO L87 Difference]: Start difference. First operand 1818 states and 6746 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:54:30,739 WARN L207 SmtUtils]: Spent 12.06 s on a formula simplification that was a NOOP. DAG size: 29 [2021-10-07 15:54:44,977 WARN L207 SmtUtils]: Spent 12.07 s on a formula simplification that was a NOOP. DAG size: 28 [2021-10-07 15:55:03,887 WARN L207 SmtUtils]: Spent 14.01 s on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-10-07 15:55:14,075 WARN L207 SmtUtils]: Spent 9.59 s on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-10-07 15:55:24,263 WARN L207 SmtUtils]: Spent 9.66 s on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-10-07 15:55:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:55:24,765 INFO L93 Difference]: Finished difference Result 2035 states and 7217 transitions. [2021-10-07 15:55:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:55:24,766 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-07 15:55:24,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:55:24,774 INFO L225 Difference]: With dead ends: 2035 [2021-10-07 15:55:24,774 INFO L226 Difference]: Without dead ends: 2030 [2021-10-07 15:55:24,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 68863.4ms TimeCoverageRelationStatistics Valid=93, Invalid=553, Unknown=4, NotChecked=0, Total=650 [2021-10-07 15:55:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2021-10-07 15:55:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1848. [2021-10-07 15:55:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.720086626962642) internal successors, (6871), 1847 states have internal predecessors, (6871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:55:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6871 transitions. [2021-10-07 15:55:24,828 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6871 transitions. Word has length 19 [2021-10-07 15:55:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:55:24,828 INFO L470 AbstractCegarLoop]: Abstraction has 1848 states and 6871 transitions. [2021-10-07 15:55:24,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:55:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6871 transitions. [2021-10-07 15:55:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:55:24,831 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:55:24,832 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:55:24,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (159)] Ended with exit code 0 [2021-10-07 15:55:25,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-07 15:55:25,032 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-10-07 15:55:25,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:55:25,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1585621875, now seen corresponding path program 141 times [2021-10-07 15:55:25,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-07 15:55:25,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774117660] [2021-10-07 15:55:25,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:55:25,034 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-07 15:55:25,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-07 15:55:25,035 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-07 15:55:25,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (160)] Waiting until timeout for monitored process [2021-10-07 15:55:26,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:55:26,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:55:26,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 15:55:26,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:55:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:55:28,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-07 15:55:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:55:37,000 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-07 15:55:37,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774117660] [2021-10-07 15:55:37,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774117660] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-07 15:55:37,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:55:37,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-07 15:55:37,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108413784] [2021-10-07 15:55:37,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:55:37,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-07 15:55:37,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:55:37,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=328, Unknown=2, NotChecked=0, Total=380 [2021-10-07 15:55:37,002 INFO L87 Difference]: Start difference. First operand 1848 states and 6871 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-10-07 15:55:40,099 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 15:55:40,108 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (160)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 15:55:41,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (160)] Ended with exit code 0 [2021-10-07 15:55:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:55:41,219 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 15:55:41,220 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. [2021-10-07 15:55:41,226 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-07 15:55:41,226 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-07 15:55:41,226 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-07 15:55:41,226 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-07 15:55:41,226 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-07 15:55:41,227 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-07 15:55:41,227 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-07 15:55:41,227 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-07 15:55:41,227 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK [2021-10-07 15:55:41,227 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 15:55:41,227 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 15:55:41,234 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 15:55:41,234 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 15:55:41,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 03:55:41 BasicIcfg [2021-10-07 15:55:41,256 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 15:55:41,258 INFO L168 Benchmark]: Toolchain (without parser) took 823087.19 ms. Allocated memory was 153.1 MB in the beginning and 400.6 MB in the end (delta: 247.5 MB). Free memory was 126.8 MB in the beginning and 139.5 MB in the end (delta: -12.6 MB). Peak memory consumption was 235.9 MB. Max. memory is 8.0 GB. [2021-10-07 15:55:41,262 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory is still 79.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 15:55:41,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.81 ms. Allocated memory is still 153.1 MB. Free memory was 126.5 MB in the beginning and 115.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-10-07 15:55:41,264 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.30 ms. Allocated memory is still 153.1 MB. Free memory was 115.6 MB in the beginning and 114.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-07 15:55:41,265 INFO L168 Benchmark]: Boogie Preprocessor took 74.40 ms. Allocated memory is still 153.1 MB. Free memory was 114.0 MB in the beginning and 112.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-07 15:55:41,267 INFO L168 Benchmark]: RCFGBuilder took 561.87 ms. Allocated memory is still 153.1 MB. Free memory was 112.6 MB in the beginning and 123.8 MB in the end (delta: -11.2 MB). Peak memory consumption was 7.4 MB. Max. memory is 8.0 GB. [2021-10-07 15:55:41,268 INFO L168 Benchmark]: TraceAbstraction took 821996.39 ms. Allocated memory was 153.1 MB in the beginning and 400.6 MB in the end (delta: 247.5 MB). Free memory was 123.1 MB in the beginning and 139.5 MB in the end (delta: -16.4 MB). Peak memory consumption was 231.6 MB. Max. memory is 8.0 GB. [2021-10-07 15:55:41,273 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks [2021-10-07 15:55:41,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory is still 79.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 384.81 ms. Allocated memory is still 153.1 MB. Free memory was 126.5 MB in the beginning and 115.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 52.30 ms. Allocated memory is still 153.1 MB. Free memory was 115.6 MB in the beginning and 114.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 74.40 ms. Allocated memory is still 153.1 MB. Free memory was 114.0 MB in the beginning and 112.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 561.87 ms. Allocated memory is still 153.1 MB. Free memory was 112.6 MB in the beginning and 123.8 MB in the end (delta: -11.2 MB). Peak memory consumption was 7.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 821996.39 ms. Allocated memory was 153.1 MB in the beginning and 400.6 MB in the end (delta: 247.5 MB). Free memory was 123.1 MB in the beginning and 139.5 MB in the end (delta: -16.4 MB). Peak memory consumption was 231.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 11481.2ms, 116 PlacesBefore, 32 PlacesAfterwards, 117 TransitionsBefore, 27 TransitionsAfterwards, 1248 CoEnabledTransitionPairs, 8 FixpointIterations, 72 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 0 ConcurrentYvCompositions, 6 ChoiceCompositions, 118 TotalNumberOfCompositions, 1224 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1224, positive: 1224, positive conditional: 0, positive unconditional: 1224, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 691, positive: 691, positive conditional: 0, positive unconditional: 691, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 691, positive: 691, positive conditional: 0, positive unconditional: 691, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1224, positive: 533, positive conditional: 0, positive unconditional: 533, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 691, unknown conditional: 0, unknown unconditional: 691] , Statistics on independence cache: Total cache size (in pairs): 32, Positive cache size: 32, Positive conditional cache size: 0, Positive unconditional cache size: 32, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1848states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 140 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 821801.1ms, OverallIterations: 159, TraceHistogramMax: 3, EmptinessCheckTime: 282.1ms, AutomataDifference: 512034.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11549.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6048 SDtfs, 16504 SDslu, 36348 SDs, 0 SdLazy, 39341 SolverSat, 4316 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 131776.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8306 GetRequests, 4068 SyntacticMatches, 30 SemanticMatches, 4207 ConstructedPredicates, 0 IntricatePredicates, 14 DeprecatedPredicates, 27285 ImplicationChecksByTransitivity, 465377.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1848occurred in iteration=158, InterpolantAutomatonStates: 3569, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2662.8ms AutomataMinimizationTime, 158 MinimizatonAttempts, 23646 StatesRemovedByMinimization, 152 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1141.3ms SsaConstructionTime, 18100.4ms SatisfiabilityAnalysisTime, 148448.7ms InterpolantComputationTime, 2656 NumberOfCodeBlocks, 2656 NumberOfCodeBlocksAsserted, 331 NumberOfCheckSat, 4994 ConstructedInterpolants, 42 QuantifiedInterpolants, 38192 SizeOfPredicates, 480 NumberOfNonLiveVariables, 12707 ConjunctsInSsa, 1540 ConjunctsInUnsatCore, 318 InterpolantComputations, 25 PerfectInterpolantSequences, 426/2160 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 could not prove your program: Timeout Completed graceful shutdown