/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/popl20/mult-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-06 21:27:38,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-06 21:27:38,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-06 21:27:38,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-06 21:27:38,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-06 21:27:38,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-06 21:27:38,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-06 21:27:38,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-06 21:27:38,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-06 21:27:38,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-06 21:27:38,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-06 21:27:38,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-06 21:27:38,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-06 21:27:38,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-06 21:27:38,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-06 21:27:38,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-06 21:27:38,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-06 21:27:38,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-06 21:27:38,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-06 21:27:38,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-06 21:27:38,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-06 21:27:38,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-06 21:27:38,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-06 21:27:38,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-06 21:27:38,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-06 21:27:38,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-06 21:27:38,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-06 21:27:38,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-06 21:27:38,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-06 21:27:38,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-06 21:27:38,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-06 21:27:38,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-06 21:27:38,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-06 21:27:38,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-06 21:27:38,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-06 21:27:38,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-06 21:27:38,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-06 21:27:38,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-06 21:27:38,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-06 21:27:38,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-06 21:27:38,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-06 21:27:38,639 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-06 21:27:38,668 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-06 21:27:38,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-06 21:27:38,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-06 21:27:38,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-06 21:27:38,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-06 21:27:38,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-06 21:27:38,671 INFO L138 SettingsManager]: * Use SBE=true [2021-10-06 21:27:38,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-06 21:27:38,671 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-06 21:27:38,671 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-06 21:27:38,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-06 21:27:38,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-06 21:27:38,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-06 21:27:38,672 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-06 21:27:38,672 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-06 21:27:38,673 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-06 21:27:38,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-06 21:27:38,673 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-06 21:27:38,673 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-06 21:27:38,673 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-06 21:27:38,673 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-06 21:27:38,674 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-06 21:27:38,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-06 21:27:38,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-06 21:27:38,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-06 21:27:38,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-06 21:27:38,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-06 21:27:38,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-06 21:27:38,675 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-06 21:27:38,675 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-06 21:27:38,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-06 21:27:38,676 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-06 21:27:38,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-06 21:27:39,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-06 21:27:39,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-06 21:27:39,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-06 21:27:39,126 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-06 21:27:39,127 INFO L275 PluginConnector]: CDTParser initialized [2021-10-06 21:27:39,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20/mult-4.wvr.c [2021-10-06 21:27:39,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bf225e29/5d5fc748d1514ecb937cff93de752297/FLAG385dc8743 [2021-10-06 21:27:39,825 INFO L306 CDTParser]: Found 1 translation units. [2021-10-06 21:27:39,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/mult-4.wvr.c [2021-10-06 21:27:39,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bf225e29/5d5fc748d1514ecb937cff93de752297/FLAG385dc8743 [2021-10-06 21:27:40,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bf225e29/5d5fc748d1514ecb937cff93de752297 [2021-10-06 21:27:40,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-06 21:27:40,221 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-06 21:27:40,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-06 21:27:40,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-06 21:27:40,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-06 21:27:40,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 09:27:40" (1/1) ... [2021-10-06 21:27:40,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22bae364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40, skipping insertion in model container [2021-10-06 21:27:40,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 09:27:40" (1/1) ... [2021-10-06 21:27:40,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-06 21:27:40,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-06 21:27:40,551 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/popl20/mult-4.wvr.c[2369,2382] [2021-10-06 21:27:40,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 21:27:40,568 INFO L203 MainTranslator]: Completed pre-run [2021-10-06 21:27:40,596 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/popl20/mult-4.wvr.c[2369,2382] [2021-10-06 21:27:40,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-06 21:27:40,616 INFO L208 MainTranslator]: Completed translation [2021-10-06 21:27:40,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40 WrapperNode [2021-10-06 21:27:40,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-06 21:27:40,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-06 21:27:40,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-06 21:27:40,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-06 21:27:40,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40" (1/1) ... [2021-10-06 21:27:40,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40" (1/1) ... [2021-10-06 21:27:40,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-06 21:27:40,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-06 21:27:40,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-06 21:27:40,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-06 21:27:40,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40" (1/1) ... [2021-10-06 21:27:40,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40" (1/1) ... [2021-10-06 21:27:40,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40" (1/1) ... [2021-10-06 21:27:40,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40" (1/1) ... [2021-10-06 21:27:40,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40" (1/1) ... [2021-10-06 21:27:40,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40" (1/1) ... [2021-10-06 21:27:40,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40" (1/1) ... [2021-10-06 21:27:40,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-06 21:27:40,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-06 21:27:40,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-06 21:27:40,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-06 21:27:40,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40" (1/1) ... [2021-10-06 21:27:40,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-06 21:27:40,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-06 21:27:40,806 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) [2021-10-06 21:27:40,822 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 [2021-10-06 21:27:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-06 21:27:40,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-06 21:27:40,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-06 21:27:40,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-06 21:27:40,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-06 21:27:40,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-06 21:27:40,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-06 21:27:40,868 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-06 21:27:40,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-06 21:27:40,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-06 21:27:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-06 21:27:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-06 21:27:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-06 21:27:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-06 21:27:40,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-06 21:27:40,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-06 21:27:40,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-06 21:27:40,872 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-06 21:27:41,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-06 21:27:41,479 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-06 21:27:41,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 09:27:41 BoogieIcfgContainer [2021-10-06 21:27:41,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-06 21:27:41,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-06 21:27:41,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-06 21:27:41,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-06 21:27:41,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.10 09:27:40" (1/3) ... [2021-10-06 21:27:41,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8d9677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 09:27:41, skipping insertion in model container [2021-10-06 21:27:41,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 09:27:40" (2/3) ... [2021-10-06 21:27:41,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8d9677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 09:27:41, skipping insertion in model container [2021-10-06 21:27:41,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 09:27:41" (3/3) ... [2021-10-06 21:27:41,502 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-4.wvr.c [2021-10-06 21:27:41,510 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-06 21:27:41,511 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-10-06 21:27:41,511 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-06 21:27:41,576 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,577 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,577 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,578 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,578 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,578 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,578 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,578 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,579 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,579 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,579 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,579 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,579 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,580 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,580 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,580 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,581 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,581 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,581 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,581 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,581 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,582 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,582 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,582 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,583 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,583 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,583 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,583 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,584 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,584 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,584 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,584 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,584 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,585 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,585 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,585 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,586 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,586 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,586 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,586 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,587 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,587 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,587 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,587 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,587 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,588 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,588 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,588 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,588 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,588 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,589 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,589 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,589 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,589 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,590 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,590 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,590 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,590 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,591 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,591 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,591 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,591 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,592 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,592 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,592 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,592 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,592 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,593 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,593 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,593 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,596 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,597 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,597 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,600 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,600 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,600 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,601 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,603 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,604 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,604 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,604 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,607 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,607 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_~i~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,607 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,608 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,608 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,608 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-06 21:27:41,619 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-06 21:27:41,669 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-06 21:27:41,679 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 [2021-10-06 21:27:41,680 INFO L340 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2021-10-06 21:27:41,713 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-06 21:27:41,726 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 138 transitions, 308 flow [2021-10-06 21:27:41,735 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 138 transitions, 308 flow [2021-10-06 21:27:41,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 138 transitions, 308 flow [2021-10-06 21:27:41,848 INFO L129 PetriNetUnfolder]: 10/134 cut-off events. [2021-10-06 21:27:41,848 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-06 21:27:41,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 134 events. 10/134 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 146 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2021-10-06 21:27:41,865 INFO L116 LiptonReduction]: Number of co-enabled transitions 2736 [2021-10-06 21:27:58,556 INFO L131 LiptonReduction]: Checked pairs total: 3156 [2021-10-06 21:27:58,556 INFO L133 LiptonReduction]: Total number of compositions: 130 [2021-10-06 21:27:58,566 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 51 transitions, 134 flow [2021-10-06 21:27:58,626 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 643 states, 625 states have (on average 4.2784) internal successors, (2674), 642 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:27:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 643 states, 625 states have (on average 4.2784) internal successors, (2674), 642 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:27:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2021-10-06 21:27:58,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:27:58,638 INFO L512 BasicCegarLoop]: trace histogram [1] [2021-10-06 21:27:58,639 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:27:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:27:58,645 INFO L82 PathProgramCache]: Analyzing trace with hash 551, now seen corresponding path program 1 times [2021-10-06 21:27:58,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:27:58,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534838201] [2021-10-06 21:27:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:27:58,663 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:27:58,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:27:58,687 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) [2021-10-06 21:27:58,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-06 21:27:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:27:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-06 21:27:58,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:27:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:27:58,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:27:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:27:58,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:27:58,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534838201] [2021-10-06 21:27:58,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534838201] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:27:58,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:27:58,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0, 0] imperfect sequences [] total 0 [2021-10-06 21:27:58,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816943027] [2021-10-06 21:27:58,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-06 21:27:58,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:27:58,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-06 21:27:58,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-06 21:27:58,796 INFO L87 Difference]: Start difference. First operand has 643 states, 625 states have (on average 4.2784) internal successors, (2674), 642 states have internal predecessors, (2674), 0 states have call successors, (0), 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) [2021-10-06 21:27:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:27:58,850 INFO L93 Difference]: Finished difference Result 640 states and 2671 transitions. [2021-10-06 21:27:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-06 21:27:58,852 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 [2021-10-06 21:27:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:27:58,880 INFO L225 Difference]: With dead ends: 640 [2021-10-06 21:27:58,881 INFO L226 Difference]: Without dead ends: 640 [2021-10-06 21:27:58,882 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 [2021-10-06 21:27:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-10-06 21:27:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2021-10-06 21:27:59,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 625 states have (on average 4.2736) internal successors, (2671), 639 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:27:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2671 transitions. [2021-10-06 21:27:59,037 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2671 transitions. Word has length 1 [2021-10-06 21:27:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:27:59,038 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 2671 transitions. [2021-10-06 21:27:59,038 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) [2021-10-06 21:27:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2671 transitions. [2021-10-06 21:27:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-06 21:27:59,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:27:59,039 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-06 21:27:59,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-06 21:27:59,251 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 [2021-10-06 21:27:59,252 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:27:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:27:59,253 INFO L82 PathProgramCache]: Analyzing trace with hash 540911, now seen corresponding path program 1 times [2021-10-06 21:27:59,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:27:59,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301136931] [2021-10-06 21:27:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:27:59,258 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:27:59,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:27:59,259 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) [2021-10-06 21:27:59,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-06 21:27:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:27:59,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 21:27:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:27:59,773 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-06 21:27:59,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 190 treesize of output 233 [2021-10-06 21:28:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:04,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:04,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:04,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301136931] [2021-10-06 21:28:04,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301136931] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:04,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:04,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:28:04,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335511263] [2021-10-06 21:28:04,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:28:04,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:28:04,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:28:04,037 INFO L87 Difference]: Start difference. First operand 640 states and 2671 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) [2021-10-06 21:28:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:04,127 INFO L93 Difference]: Finished difference Result 610 states and 2557 transitions. [2021-10-06 21:28:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:28:04,128 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 [2021-10-06 21:28:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:04,137 INFO L225 Difference]: With dead ends: 610 [2021-10-06 21:28:04,137 INFO L226 Difference]: Without dead ends: 610 [2021-10-06 21:28:04,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:28:04,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-10-06 21:28:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-10-06 21:28:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 597 states have (on average 4.283082077051926) internal successors, (2557), 609 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 2557 transitions. [2021-10-06 21:28:04,178 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 2557 transitions. Word has length 3 [2021-10-06 21:28:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:04,179 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 2557 transitions. [2021-10-06 21:28:04,179 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) [2021-10-06 21:28:04,179 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 2557 transitions. [2021-10-06 21:28:04,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-06 21:28:04,180 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:04,180 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-06 21:28:04,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:04,394 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 [2021-10-06 21:28:04,395 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:04,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:04,396 INFO L82 PathProgramCache]: Analyzing trace with hash 540913, now seen corresponding path program 1 times [2021-10-06 21:28:04,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:04,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959272632] [2021-10-06 21:28:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:04,399 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:04,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:04,400 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) [2021-10-06 21:28:04,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-06 21:28:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:04,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:04,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:04,696 INFO L354 Elim1Store]: treesize reduction 237, result has 17.1 percent of original size [2021-10-06 21:28:04,697 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 5 case distinctions, treesize of input 45 treesize of output 77 [2021-10-06 21:28:04,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 319 treesize of output 303 [2021-10-06 21:28:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:05,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:05,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:05,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959272632] [2021-10-06 21:28:05,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959272632] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:05,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:05,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:28:05,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622417244] [2021-10-06 21:28:05,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:28:05,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:05,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:28:05,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:28:05,867 INFO L87 Difference]: Start difference. First operand 610 states and 2557 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) [2021-10-06 21:28:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:05,940 INFO L93 Difference]: Finished difference Result 580 states and 2443 transitions. [2021-10-06 21:28:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:28:05,941 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 [2021-10-06 21:28:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:05,948 INFO L225 Difference]: With dead ends: 580 [2021-10-06 21:28:05,948 INFO L226 Difference]: Without dead ends: 580 [2021-10-06 21:28:05,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:28:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-10-06 21:28:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-10-06 21:28:05,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 569 states have (on average 4.293497363796134) internal successors, (2443), 579 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 2443 transitions. [2021-10-06 21:28:05,978 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 2443 transitions. Word has length 3 [2021-10-06 21:28:05,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:05,978 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 2443 transitions. [2021-10-06 21:28:05,978 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) [2021-10-06 21:28:05,978 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 2443 transitions. [2021-10-06 21:28:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-06 21:28:05,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:05,979 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-06 21:28:05,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:06,191 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 [2021-10-06 21:28:06,191 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash 519828931, now seen corresponding path program 1 times [2021-10-06 21:28:06,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:06,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295004279] [2021-10-06 21:28:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:06,194 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:06,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:06,195 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) [2021-10-06 21:28:06,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-06 21:28:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:06,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:06,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:06,479 INFO L354 Elim1Store]: treesize reduction 237, result has 17.1 percent of original size [2021-10-06 21:28:06,479 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 5 case distinctions, treesize of input 46 treesize of output 78 [2021-10-06 21:28:06,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 454 treesize of output 422 [2021-10-06 21:28:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:07,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:07,207 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:07,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295004279] [2021-10-06 21:28:07,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295004279] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:07,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:07,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:28:07,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119480419] [2021-10-06 21:28:07,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:28:07,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:07,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:28:07,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:28:07,210 INFO L87 Difference]: Start difference. First operand 580 states and 2443 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) [2021-10-06 21:28:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:07,281 INFO L93 Difference]: Finished difference Result 562 states and 2389 transitions. [2021-10-06 21:28:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:28:07,282 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 [2021-10-06 21:28:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:07,289 INFO L225 Difference]: With dead ends: 562 [2021-10-06 21:28:07,290 INFO L226 Difference]: Without dead ends: 562 [2021-10-06 21:28:07,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:28:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-10-06 21:28:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-10-06 21:28:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 553 states have (on average 4.320072332730561) internal successors, (2389), 561 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 2389 transitions. [2021-10-06 21:28:07,318 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 2389 transitions. Word has length 5 [2021-10-06 21:28:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:07,319 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 2389 transitions. [2021-10-06 21:28:07,319 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) [2021-10-06 21:28:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 2389 transitions. [2021-10-06 21:28:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-06 21:28:07,320 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:07,320 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-06 21:28:07,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:07,535 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 [2021-10-06 21:28:07,536 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:07,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:07,537 INFO L82 PathProgramCache]: Analyzing trace with hash 519828932, now seen corresponding path program 1 times [2021-10-06 21:28:07,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:07,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415253142] [2021-10-06 21:28:07,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:07,539 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:07,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:07,542 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) [2021-10-06 21:28:07,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-06 21:28:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:07,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-06 21:28:07,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:07,844 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-06 21:28:07,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-06 21:28:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:08,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:08,428 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:08,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415253142] [2021-10-06 21:28:08,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415253142] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:08,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:08,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-06 21:28:08,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443103630] [2021-10-06 21:28:08,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 21:28:08,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:08,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 21:28:08,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:28:08,431 INFO L87 Difference]: Start difference. First operand 562 states and 2389 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) [2021-10-06 21:28:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:08,480 INFO L93 Difference]: Finished difference Result 544 states and 2335 transitions. [2021-10-06 21:28:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:28:08,481 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 [2021-10-06 21:28:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:08,488 INFO L225 Difference]: With dead ends: 544 [2021-10-06 21:28:08,489 INFO L226 Difference]: Without dead ends: 544 [2021-10-06 21:28:08,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:28:08,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-10-06 21:28:08,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-10-06 21:28:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 537 states have (on average 4.348230912476723) internal successors, (2335), 543 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:08,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 2335 transitions. [2021-10-06 21:28:08,546 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 2335 transitions. Word has length 5 [2021-10-06 21:28:08,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:08,546 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 2335 transitions. [2021-10-06 21:28:08,546 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) [2021-10-06 21:28:08,546 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 2335 transitions. [2021-10-06 21:28:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-06 21:28:08,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:08,547 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:08,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:08,759 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 [2021-10-06 21:28:08,761 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:08,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1339407833, now seen corresponding path program 1 times [2021-10-06 21:28:08,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:08,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096737946] [2021-10-06 21:28:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:08,764 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:08,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:08,765 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) [2021-10-06 21:28:08,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-06 21:28:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:08,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 21:28:08,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:09,038 INFO L354 Elim1Store]: treesize reduction 231, result has 19.2 percent of original size [2021-10-06 21:28:09,039 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 5 case distinctions, treesize of input 21 treesize of output 60 [2021-10-06 21:28:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:09,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:09,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:09,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096737946] [2021-10-06 21:28:09,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096737946] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:09,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:09,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-06 21:28:09,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009759422] [2021-10-06 21:28:09,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-06 21:28:09,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:09,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-06 21:28:09,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:28:09,242 INFO L87 Difference]: Start difference. First operand 544 states and 2335 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-10-06 21:28:09,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:09,290 INFO L93 Difference]: Finished difference Result 514 states and 2221 transitions. [2021-10-06 21:28:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:28:09,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 7 [2021-10-06 21:28:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:09,297 INFO L225 Difference]: With dead ends: 514 [2021-10-06 21:28:09,297 INFO L226 Difference]: Without dead ends: 514 [2021-10-06 21:28:09,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-06 21:28:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-10-06 21:28:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-10-06 21:28:09,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 509 states have (on average 4.363457760314342) internal successors, (2221), 513 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 2221 transitions. [2021-10-06 21:28:09,322 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 2221 transitions. Word has length 7 [2021-10-06 21:28:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:09,322 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 2221 transitions. [2021-10-06 21:28:09,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-10-06 21:28:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 2221 transitions. [2021-10-06 21:28:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-06 21:28:09,324 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:09,324 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:09,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:09,535 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 [2021-10-06 21:28:09,537 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:09,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1339407834, now seen corresponding path program 1 times [2021-10-06 21:28:09,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:09,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949115085] [2021-10-06 21:28:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:09,539 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:09,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:09,540 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) [2021-10-06 21:28:09,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-06 21:28:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:09,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-06 21:28:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:09,827 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-06 21:28:09,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-06 21:28:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:10,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:10,427 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:10,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949115085] [2021-10-06 21:28:10,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949115085] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:10,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:10,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-06 21:28:10,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000752241] [2021-10-06 21:28:10,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 21:28:10,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:10,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 21:28:10,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:28:10,429 INFO L87 Difference]: Start difference. First operand 514 states and 2221 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:10,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:10,464 INFO L93 Difference]: Finished difference Result 484 states and 2107 transitions. [2021-10-06 21:28:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:28:10,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-10-06 21:28:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:10,471 INFO L225 Difference]: With dead ends: 484 [2021-10-06 21:28:10,471 INFO L226 Difference]: Without dead ends: 484 [2021-10-06 21:28:10,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:28:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-10-06 21:28:10,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2021-10-06 21:28:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 481 states have (on average 4.38045738045738) internal successors, (2107), 483 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 2107 transitions. [2021-10-06 21:28:10,494 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 2107 transitions. Word has length 7 [2021-10-06 21:28:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:10,495 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 2107 transitions. [2021-10-06 21:28:10,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 2107 transitions. [2021-10-06 21:28:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-06 21:28:10,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:10,496 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:10,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:10,708 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 [2021-10-06 21:28:10,709 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:10,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:10,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1319246832, now seen corresponding path program 1 times [2021-10-06 21:28:10,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:10,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132127956] [2021-10-06 21:28:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:10,712 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:10,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:10,713 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) [2021-10-06 21:28:10,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-06 21:28:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:10,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:11,036 INFO L354 Elim1Store]: treesize reduction 350, result has 15.7 percent of original size [2021-10-06 21:28:11,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 70 [2021-10-06 21:28:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:11,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:11,581 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:11,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132127956] [2021-10-06 21:28:11,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132127956] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:11,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:11,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-06 21:28:11,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419677770] [2021-10-06 21:28:11,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 21:28:11,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:11,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 21:28:11,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:28:11,583 INFO L87 Difference]: Start difference. First operand 484 states and 2107 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2021-10-06 21:28:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:11,635 INFO L93 Difference]: Finished difference Result 403 states and 1702 transitions. [2021-10-06 21:28:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:28:11,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 9 [2021-10-06 21:28:11,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:11,641 INFO L225 Difference]: With dead ends: 403 [2021-10-06 21:28:11,642 INFO L226 Difference]: Without dead ends: 403 [2021-10-06 21:28:11,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:28:11,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-10-06 21:28:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2021-10-06 21:28:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 401 states have (on average 4.2443890274314215) internal successors, (1702), 402 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1702 transitions. [2021-10-06 21:28:11,660 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1702 transitions. Word has length 9 [2021-10-06 21:28:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:11,661 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1702 transitions. [2021-10-06 21:28:11,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2021-10-06 21:28:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1702 transitions. [2021-10-06 21:28:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-06 21:28:11,662 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:11,662 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:11,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:11,877 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 [2021-10-06 21:28:11,879 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:11,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1319246831, now seen corresponding path program 1 times [2021-10-06 21:28:11,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:11,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753425612] [2021-10-06 21:28:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:11,882 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:11,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:11,883 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) [2021-10-06 21:28:11,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-06 21:28:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:11,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-06 21:28:11,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:12,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:12,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:12,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753425612] [2021-10-06 21:28:12,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753425612] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:12,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:12,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-06 21:28:12,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529935839] [2021-10-06 21:28:12,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 21:28:12,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 21:28:12,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:28:12,213 INFO L87 Difference]: Start difference. First operand 403 states and 1702 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:12,252 INFO L93 Difference]: Finished difference Result 322 states and 1297 transitions. [2021-10-06 21:28:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:28:12,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-10-06 21:28:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:12,256 INFO L225 Difference]: With dead ends: 322 [2021-10-06 21:28:12,256 INFO L226 Difference]: Without dead ends: 322 [2021-10-06 21:28:12,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:28:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-10-06 21:28:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-10-06 21:28:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 4.040498442367602) internal successors, (1297), 321 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1297 transitions. [2021-10-06 21:28:12,271 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1297 transitions. Word has length 9 [2021-10-06 21:28:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:12,271 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1297 transitions. [2021-10-06 21:28:12,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1297 transitions. [2021-10-06 21:28:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-06 21:28:12,275 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:12,275 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:12,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:12,487 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 [2021-10-06 21:28:12,488 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:12,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:12,489 INFO L82 PathProgramCache]: Analyzing trace with hash -189753457, now seen corresponding path program 1 times [2021-10-06 21:28:12,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:12,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395254360] [2021-10-06 21:28:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:12,491 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:12,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:12,492 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) [2021-10-06 21:28:12,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-06 21:28:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:12,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:12,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:12,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:12,762 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:12,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395254360] [2021-10-06 21:28:12,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395254360] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:12,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:12,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-06 21:28:12,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304201247] [2021-10-06 21:28:12,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-06 21:28:12,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:12,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-06 21:28:12,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:28:12,764 INFO L87 Difference]: Start difference. First operand 322 states and 1297 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:12,796 INFO L93 Difference]: Finished difference Result 609 states and 2288 transitions. [2021-10-06 21:28:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-06 21:28:12,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-10-06 21:28:12,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:12,803 INFO L225 Difference]: With dead ends: 609 [2021-10-06 21:28:12,803 INFO L226 Difference]: Without dead ends: 554 [2021-10-06 21:28:12,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-06 21:28:12,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-10-06 21:28:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2021-10-06 21:28:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.815551537070524) internal successors, (2110), 553 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 2110 transitions. [2021-10-06 21:28:12,828 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 2110 transitions. Word has length 25 [2021-10-06 21:28:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:12,829 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 2110 transitions. [2021-10-06 21:28:12,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 2110 transitions. [2021-10-06 21:28:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:12,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:12,833 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:12,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:13,045 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 [2021-10-06 21:28:13,045 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:13,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:13,046 INFO L82 PathProgramCache]: Analyzing trace with hash -721739981, now seen corresponding path program 1 times [2021-10-06 21:28:13,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:13,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602447305] [2021-10-06 21:28:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:13,048 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:13,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:13,049 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) [2021-10-06 21:28:13,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-06 21:28:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:13,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:13,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:13,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:13,315 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:13,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602447305] [2021-10-06 21:28:13,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602447305] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:13,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:13,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 21:28:13,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719567448] [2021-10-06 21:28:13,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 21:28:13,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:13,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 21:28:13,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:28:13,323 INFO L87 Difference]: Start difference. First operand 554 states and 2110 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2021-10-06 21:28:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:13,685 INFO L93 Difference]: Finished difference Result 884 states and 3255 transitions. [2021-10-06 21:28:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 21:28:13,689 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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 26 [2021-10-06 21:28:13,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:13,697 INFO L225 Difference]: With dead ends: 884 [2021-10-06 21:28:13,697 INFO L226 Difference]: Without dead ends: 868 [2021-10-06 21:28:13,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:28:13,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-10-06 21:28:13,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 612. [2021-10-06 21:28:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.8052373158756136) internal successors, (2325), 611 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2325 transitions. [2021-10-06 21:28:13,736 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2325 transitions. Word has length 26 [2021-10-06 21:28:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:13,736 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 2325 transitions. [2021-10-06 21:28:13,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2021-10-06 21:28:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2325 transitions. [2021-10-06 21:28:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:13,739 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:13,739 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:13,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:13,952 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 [2021-10-06 21:28:13,952 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:13,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:13,953 INFO L82 PathProgramCache]: Analyzing trace with hash 446465965, now seen corresponding path program 1 times [2021-10-06 21:28:13,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:13,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394412181] [2021-10-06 21:28:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:13,955 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:13,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:13,956 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) [2021-10-06 21:28:13,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-06 21:28:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:14,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:14,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:14,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:14,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:14,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394412181] [2021-10-06 21:28:14,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394412181] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:14,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:14,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 21:28:14,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102993752] [2021-10-06 21:28:14,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 21:28:14,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:14,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 21:28:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:28:14,283 INFO L87 Difference]: Start difference. First operand 612 states and 2325 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-10-06 21:28:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:14,587 INFO L93 Difference]: Finished difference Result 894 states and 3260 transitions. [2021-10-06 21:28:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 21:28:14,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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 26 [2021-10-06 21:28:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:14,597 INFO L225 Difference]: With dead ends: 894 [2021-10-06 21:28:14,597 INFO L226 Difference]: Without dead ends: 816 [2021-10-06 21:28:14,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:28:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-10-06 21:28:14,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 664. [2021-10-06 21:28:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.808446455505279) internal successors, (2525), 663 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2525 transitions. [2021-10-06 21:28:14,645 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2525 transitions. Word has length 26 [2021-10-06 21:28:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:14,646 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 2525 transitions. [2021-10-06 21:28:14,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-10-06 21:28:14,646 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2525 transitions. [2021-10-06 21:28:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:14,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:14,649 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:14,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:14,861 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 [2021-10-06 21:28:14,861 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:14,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1910589621, now seen corresponding path program 2 times [2021-10-06 21:28:14,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:14,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028573365] [2021-10-06 21:28:14,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:28:14,864 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:14,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:14,866 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) [2021-10-06 21:28:14,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-06 21:28:15,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:28:15,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:15,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:15,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:15,182 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:15,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028573365] [2021-10-06 21:28:15,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028573365] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:15,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:15,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 21:28:15,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495060407] [2021-10-06 21:28:15,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 21:28:15,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:15,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 21:28:15,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:28:15,185 INFO L87 Difference]: Start difference. First operand 664 states and 2525 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-10-06 21:28:15,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:15,449 INFO L93 Difference]: Finished difference Result 974 states and 3653 transitions. [2021-10-06 21:28:15,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 21:28:15,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 26 [2021-10-06 21:28:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:15,459 INFO L225 Difference]: With dead ends: 974 [2021-10-06 21:28:15,460 INFO L226 Difference]: Without dead ends: 960 [2021-10-06 21:28:15,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:28:15,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-10-06 21:28:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 700. [2021-10-06 21:28:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 3.8497854077253217) internal successors, (2691), 699 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2691 transitions. [2021-10-06 21:28:15,491 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2691 transitions. Word has length 26 [2021-10-06 21:28:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:15,491 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 2691 transitions. [2021-10-06 21:28:15,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-10-06 21:28:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2691 transitions. [2021-10-06 21:28:15,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:15,495 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:15,495 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:15,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-06 21:28:15,707 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 [2021-10-06 21:28:15,708 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:15,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:15,709 INFO L82 PathProgramCache]: Analyzing trace with hash 913353265, now seen corresponding path program 2 times [2021-10-06 21:28:15,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:15,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228078285] [2021-10-06 21:28:15,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:28:15,710 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:15,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:15,711 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) [2021-10-06 21:28:15,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-06 21:28:15,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:28:15,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:15,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:15,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:15,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:16,068 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:16,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228078285] [2021-10-06 21:28:16,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228078285] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:16,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:16,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 21:28:16,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625473573] [2021-10-06 21:28:16,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 21:28:16,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 21:28:16,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:28:16,069 INFO L87 Difference]: Start difference. First operand 700 states and 2691 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-10-06 21:28:16,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:16,347 INFO L93 Difference]: Finished difference Result 978 states and 3647 transitions. [2021-10-06 21:28:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 21:28:16,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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 26 [2021-10-06 21:28:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:16,358 INFO L225 Difference]: With dead ends: 978 [2021-10-06 21:28:16,358 INFO L226 Difference]: Without dead ends: 936 [2021-10-06 21:28:16,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:28:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-10-06 21:28:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 738. [2021-10-06 21:28:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.909090909090909) internal successors, (2881), 737 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2881 transitions. [2021-10-06 21:28:16,395 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2881 transitions. Word has length 26 [2021-10-06 21:28:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:16,395 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 2881 transitions. [2021-10-06 21:28:16,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-10-06 21:28:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2881 transitions. [2021-10-06 21:28:16,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:16,401 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:16,401 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:16,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:16,617 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 [2021-10-06 21:28:16,618 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:16,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:16,618 INFO L82 PathProgramCache]: Analyzing trace with hash -707073963, now seen corresponding path program 3 times [2021-10-06 21:28:16,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:16,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373323477] [2021-10-06 21:28:16,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:28:16,619 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:16,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:16,620 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) [2021-10-06 21:28:16,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-06 21:28:16,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:28:16,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:16,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 21:28:16,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:16,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:17,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:17,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373323477] [2021-10-06 21:28:17,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373323477] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:28:17,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:28:17,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 21:28:17,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813485158] [2021-10-06 21:28:17,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 21:28:17,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:17,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 21:28:17,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-06 21:28:17,059 INFO L87 Difference]: Start difference. First operand 738 states and 2881 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:17,463 INFO L93 Difference]: Finished difference Result 1566 states and 6023 transitions. [2021-10-06 21:28:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:28:17,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 26 [2021-10-06 21:28:17,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:17,477 INFO L225 Difference]: With dead ends: 1566 [2021-10-06 21:28:17,478 INFO L226 Difference]: Without dead ends: 1370 [2021-10-06 21:28:17,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:28:17,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-10-06 21:28:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 760. [2021-10-06 21:28:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.8919631093544136) internal successors, (2954), 759 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2954 transitions. [2021-10-06 21:28:17,516 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2954 transitions. Word has length 26 [2021-10-06 21:28:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:17,516 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2954 transitions. [2021-10-06 21:28:17,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2954 transitions. [2021-10-06 21:28:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:17,519 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:17,520 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:17,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:17,731 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 [2021-10-06 21:28:17,732 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:17,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1854465095, now seen corresponding path program 4 times [2021-10-06 21:28:17,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:17,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198915715] [2021-10-06 21:28:17,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:28:17,734 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:17,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:17,735 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) [2021-10-06 21:28:17,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-06 21:28:17,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:28:17,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:17,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:17,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:17,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:18,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:18,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198915715] [2021-10-06 21:28:18,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198915715] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:18,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:18,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:18,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670336445] [2021-10-06 21:28:18,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:18,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:18,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:18,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:18,069 INFO L87 Difference]: Start difference. First operand 760 states and 2954 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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) [2021-10-06 21:28:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:18,495 INFO L93 Difference]: Finished difference Result 1408 states and 5319 transitions. [2021-10-06 21:28:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:28:18,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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 26 [2021-10-06 21:28:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:18,510 INFO L225 Difference]: With dead ends: 1408 [2021-10-06 21:28:18,510 INFO L226 Difference]: Without dead ends: 1390 [2021-10-06 21:28:18,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-10-06 21:28:18,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 888. [2021-10-06 21:28:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.962795941375423) internal successors, (3515), 887 states have internal predecessors, (3515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3515 transitions. [2021-10-06 21:28:18,559 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3515 transitions. Word has length 26 [2021-10-06 21:28:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:18,559 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 3515 transitions. [2021-10-06 21:28:18,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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) [2021-10-06 21:28:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3515 transitions. [2021-10-06 21:28:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:18,564 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:18,564 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:18,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:18,776 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 [2021-10-06 21:28:18,777 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:18,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1992085325, now seen corresponding path program 5 times [2021-10-06 21:28:18,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:18,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449171805] [2021-10-06 21:28:18,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:28:18,779 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:18,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:18,781 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) [2021-10-06 21:28:18,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-06 21:28:18,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:28:18,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:18,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:18,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:19,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:19,112 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:19,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449171805] [2021-10-06 21:28:19,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449171805] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:19,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:19,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:19,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449310241] [2021-10-06 21:28:19,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:19,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:19,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:19,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:19,114 INFO L87 Difference]: Start difference. First operand 888 states and 3515 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-10-06 21:28:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:19,270 INFO L93 Difference]: Finished difference Result 1156 states and 4444 transitions. [2021-10-06 21:28:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 21:28:19,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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 26 [2021-10-06 21:28:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:19,282 INFO L225 Difference]: With dead ends: 1156 [2021-10-06 21:28:19,282 INFO L226 Difference]: Without dead ends: 1156 [2021-10-06 21:28:19,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-06 21:28:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-10-06 21:28:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 950. [2021-10-06 21:28:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 3.9135932560590097) internal successors, (3714), 949 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 3714 transitions. [2021-10-06 21:28:19,324 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 3714 transitions. Word has length 26 [2021-10-06 21:28:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:19,324 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 3714 transitions. [2021-10-06 21:28:19,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-10-06 21:28:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 3714 transitions. [2021-10-06 21:28:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:19,328 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:19,328 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:19,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:19,542 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 [2021-10-06 21:28:19,542 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:19,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1941017381, now seen corresponding path program 3 times [2021-10-06 21:28:19,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:19,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678707340] [2021-10-06 21:28:19,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:28:19,545 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:19,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:19,546 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) [2021-10-06 21:28:19,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-06 21:28:19,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:28:19,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:19,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:19,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:19,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:19,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:19,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678707340] [2021-10-06 21:28:19,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678707340] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:19,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:19,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 21:28:19,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223200591] [2021-10-06 21:28:19,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 21:28:19,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:19,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 21:28:19,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:28:19,926 INFO L87 Difference]: Start difference. First operand 950 states and 3714 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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) [2021-10-06 21:28:20,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:20,145 INFO L93 Difference]: Finished difference Result 1170 states and 4467 transitions. [2021-10-06 21:28:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 21:28:20,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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 26 [2021-10-06 21:28:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:20,154 INFO L225 Difference]: With dead ends: 1170 [2021-10-06 21:28:20,154 INFO L226 Difference]: Without dead ends: 1074 [2021-10-06 21:28:20,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:28:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-10-06 21:28:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 916. [2021-10-06 21:28:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.9475409836065576) internal successors, (3612), 915 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3612 transitions. [2021-10-06 21:28:20,191 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3612 transitions. Word has length 26 [2021-10-06 21:28:20,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:20,192 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 3612 transitions. [2021-10-06 21:28:20,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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) [2021-10-06 21:28:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3612 transitions. [2021-10-06 21:28:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:20,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:20,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:20,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-06 21:28:20,408 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 [2021-10-06 21:28:20,409 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:20,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:20,410 INFO L82 PathProgramCache]: Analyzing trace with hash 215128689, now seen corresponding path program 4 times [2021-10-06 21:28:20,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:20,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789302329] [2021-10-06 21:28:20,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:28:20,411 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:20,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:20,412 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) [2021-10-06 21:28:20,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-06 21:28:20,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:28:20,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:20,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:20,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:20,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:20,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789302329] [2021-10-06 21:28:20,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789302329] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:20,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:20,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:20,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888220708] [2021-10-06 21:28:20,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:20,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:20,775 INFO L87 Difference]: Start difference. First operand 916 states and 3612 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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) [2021-10-06 21:28:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:21,106 INFO L93 Difference]: Finished difference Result 1652 states and 6327 transitions. [2021-10-06 21:28:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:28:21,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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 26 [2021-10-06 21:28:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:21,115 INFO L225 Difference]: With dead ends: 1652 [2021-10-06 21:28:21,115 INFO L226 Difference]: Without dead ends: 1580 [2021-10-06 21:28:21,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:21,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-10-06 21:28:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1110. [2021-10-06 21:28:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 4.044183949504058) internal successors, (4485), 1109 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 4485 transitions. [2021-10-06 21:28:21,169 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 4485 transitions. Word has length 26 [2021-10-06 21:28:21,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:21,169 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 4485 transitions. [2021-10-06 21:28:21,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 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) [2021-10-06 21:28:21,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 4485 transitions. [2021-10-06 21:28:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:21,174 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:21,175 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:21,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:21,387 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 [2021-10-06 21:28:21,388 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1171231923, now seen corresponding path program 5 times [2021-10-06 21:28:21,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:21,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245366429] [2021-10-06 21:28:21,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:28:21,390 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:21,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:21,392 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) [2021-10-06 21:28:21,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-06 21:28:21,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:28:21,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:21,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:21,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:21,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:21,784 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:21,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245366429] [2021-10-06 21:28:21,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245366429] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:21,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:21,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:21,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779425570] [2021-10-06 21:28:21,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:21,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:21,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:21,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:21,786 INFO L87 Difference]: Start difference. First operand 1110 states and 4485 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:22,117 INFO L93 Difference]: Finished difference Result 2306 states and 8916 transitions. [2021-10-06 21:28:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:28:22,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 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 26 [2021-10-06 21:28:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:22,130 INFO L225 Difference]: With dead ends: 2306 [2021-10-06 21:28:22,130 INFO L226 Difference]: Without dead ends: 2208 [2021-10-06 21:28:22,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:22,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-10-06 21:28:22,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1392. [2021-10-06 21:28:22,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 4.158159597411934) internal successors, (5784), 1391 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 5784 transitions. [2021-10-06 21:28:22,201 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 5784 transitions. Word has length 26 [2021-10-06 21:28:22,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:22,202 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 5784 transitions. [2021-10-06 21:28:22,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:22,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 5784 transitions. [2021-10-06 21:28:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:22,225 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:22,225 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:22,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:22,435 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 [2021-10-06 21:28:22,436 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:22,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1500538259, now seen corresponding path program 6 times [2021-10-06 21:28:22,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:22,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232458170] [2021-10-06 21:28:22,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:28:22,438 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:22,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:22,439 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) [2021-10-06 21:28:22,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-06 21:28:22,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 21:28:22,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:22,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:22,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:22,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:22,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:22,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232458170] [2021-10-06 21:28:22,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232458170] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:22,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:22,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:22,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617386308] [2021-10-06 21:28:22,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:22,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:22,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:22,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:22,837 INFO L87 Difference]: Start difference. First operand 1392 states and 5784 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-10-06 21:28:23,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:23,130 INFO L93 Difference]: Finished difference Result 2252 states and 8860 transitions. [2021-10-06 21:28:23,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:28:23,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 26 [2021-10-06 21:28:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:23,140 INFO L225 Difference]: With dead ends: 2252 [2021-10-06 21:28:23,140 INFO L226 Difference]: Without dead ends: 2114 [2021-10-06 21:28:23,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-10-06 21:28:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1490. [2021-10-06 21:28:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 4.245130960376091) internal successors, (6321), 1489 states have internal predecessors, (6321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 6321 transitions. [2021-10-06 21:28:23,199 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 6321 transitions. Word has length 26 [2021-10-06 21:28:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:23,200 INFO L470 AbstractCegarLoop]: Abstraction has 1490 states and 6321 transitions. [2021-10-06 21:28:23,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-10-06 21:28:23,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 6321 transitions. [2021-10-06 21:28:23,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:23,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:23,206 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:23,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:23,418 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 [2021-10-06 21:28:23,419 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:23,420 INFO L82 PathProgramCache]: Analyzing trace with hash -919711329, now seen corresponding path program 7 times [2021-10-06 21:28:23,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:23,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228722171] [2021-10-06 21:28:23,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:28:23,421 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:23,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:23,422 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) [2021-10-06 21:28:23,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-06 21:28:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:23,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 21:28:23,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:23,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:23,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:23,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228722171] [2021-10-06 21:28:23,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228722171] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:28:23,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:28:23,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 21:28:23,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896616599] [2021-10-06 21:28:23,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 21:28:23,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 21:28:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-06 21:28:23,833 INFO L87 Difference]: Start difference. First operand 1490 states and 6321 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-10-06 21:28:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:24,203 INFO L93 Difference]: Finished difference Result 2700 states and 11161 transitions. [2021-10-06 21:28:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:28:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 26 [2021-10-06 21:28:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:24,217 INFO L225 Difference]: With dead ends: 2700 [2021-10-06 21:28:24,217 INFO L226 Difference]: Without dead ends: 2586 [2021-10-06 21:28:24,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-10-06 21:28:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 1568. [2021-10-06 21:28:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 4.340778557753669) internal successors, (6802), 1567 states have internal predecessors, (6802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 6802 transitions. [2021-10-06 21:28:24,280 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 6802 transitions. Word has length 26 [2021-10-06 21:28:24,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:24,280 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 6802 transitions. [2021-10-06 21:28:24,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-10-06 21:28:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 6802 transitions. [2021-10-06 21:28:24,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:24,289 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:24,289 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:24,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:24,502 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 [2021-10-06 21:28:24,502 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2085961755, now seen corresponding path program 6 times [2021-10-06 21:28:24,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:24,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579165441] [2021-10-06 21:28:24,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:28:24,504 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:24,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:24,506 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) [2021-10-06 21:28:24,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-06 21:28:24,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 21:28:24,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:24,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:24,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:24,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:24,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:24,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579165441] [2021-10-06 21:28:24,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579165441] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:24,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:24,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:24,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081508662] [2021-10-06 21:28:24,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:24,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:24,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:24,907 INFO L87 Difference]: Start difference. First operand 1568 states and 6802 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-10-06 21:28:25,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:25,238 INFO L93 Difference]: Finished difference Result 2610 states and 11023 transitions. [2021-10-06 21:28:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:28:25,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 26 [2021-10-06 21:28:25,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:25,253 INFO L225 Difference]: With dead ends: 2610 [2021-10-06 21:28:25,253 INFO L226 Difference]: Without dead ends: 2556 [2021-10-06 21:28:25,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:25,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-10-06 21:28:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1674. [2021-10-06 21:28:25,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 4.408846383741781) internal successors, (7376), 1673 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 7376 transitions. [2021-10-06 21:28:25,362 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 7376 transitions. Word has length 26 [2021-10-06 21:28:25,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:25,362 INFO L470 AbstractCegarLoop]: Abstraction has 1674 states and 7376 transitions. [2021-10-06 21:28:25,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-10-06 21:28:25,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 7376 transitions. [2021-10-06 21:28:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:25,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:25,370 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:25,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:25,583 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 [2021-10-06 21:28:25,584 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:25,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1637544879, now seen corresponding path program 7 times [2021-10-06 21:28:25,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:25,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494234022] [2021-10-06 21:28:25,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:28:25,586 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:25,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:25,587 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) [2021-10-06 21:28:25,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-06 21:28:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:25,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:25,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:25,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:25,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:25,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494234022] [2021-10-06 21:28:25,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494234022] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:25,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:25,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:25,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789310509] [2021-10-06 21:28:25,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:25,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:25,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:25,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:25,967 INFO L87 Difference]: Start difference. First operand 1674 states and 7376 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:26,343 INFO L93 Difference]: Finished difference Result 3452 states and 14672 transitions. [2021-10-06 21:28:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:28:26,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2021-10-06 21:28:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:26,366 INFO L225 Difference]: With dead ends: 3452 [2021-10-06 21:28:26,366 INFO L226 Difference]: Without dead ends: 3416 [2021-10-06 21:28:26,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2021-10-06 21:28:26,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1992. [2021-10-06 21:28:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 4.545454545454546) internal successors, (9050), 1991 states have internal predecessors, (9050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:26,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 9050 transitions. [2021-10-06 21:28:26,506 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 9050 transitions. Word has length 26 [2021-10-06 21:28:26,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:26,506 INFO L470 AbstractCegarLoop]: Abstraction has 1992 states and 9050 transitions. [2021-10-06 21:28:26,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:26,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 9050 transitions. [2021-10-06 21:28:26,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:26,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:26,514 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:26,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:26,727 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 [2021-10-06 21:28:26,728 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1969378371, now seen corresponding path program 8 times [2021-10-06 21:28:26,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:26,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575076335] [2021-10-06 21:28:26,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:28:26,730 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:26,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:26,731 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) [2021-10-06 21:28:26,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-06 21:28:26,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:28:27,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 21:28:27,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:27,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:27,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:27,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575076335] [2021-10-06 21:28:27,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575076335] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-06 21:28:27,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 21:28:27,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-10-06 21:28:27,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758643297] [2021-10-06 21:28:27,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-06 21:28:27,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:27,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-06 21:28:27,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-06 21:28:27,248 INFO L87 Difference]: Start difference. First operand 1992 states and 9050 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-10-06 21:28:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:27,386 INFO L93 Difference]: Finished difference Result 2952 states and 13074 transitions. [2021-10-06 21:28:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 21:28:27,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 26 [2021-10-06 21:28:27,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:27,401 INFO L225 Difference]: With dead ends: 2952 [2021-10-06 21:28:27,401 INFO L226 Difference]: Without dead ends: 2928 [2021-10-06 21:28:27,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-06 21:28:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2021-10-06 21:28:27,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 2230. [2021-10-06 21:28:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 4.5459847465231045) internal successors, (10133), 2229 states have internal predecessors, (10133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 10133 transitions. [2021-10-06 21:28:27,549 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 10133 transitions. Word has length 26 [2021-10-06 21:28:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:27,549 INFO L470 AbstractCegarLoop]: Abstraction has 2230 states and 10133 transitions. [2021-10-06 21:28:27,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-10-06 21:28:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 10133 transitions. [2021-10-06 21:28:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:27,559 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:27,559 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:27,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:27,772 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 [2021-10-06 21:28:27,772 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:27,773 INFO L82 PathProgramCache]: Analyzing trace with hash -702673123, now seen corresponding path program 8 times [2021-10-06 21:28:27,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:27,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228046719] [2021-10-06 21:28:27,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:28:27,774 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:27,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:27,775 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) [2021-10-06 21:28:27,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-06 21:28:28,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:28:28,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:28,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:28,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:28,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:28,194 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:28,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228046719] [2021-10-06 21:28:28,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228046719] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:28,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:28,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:28,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409136280] [2021-10-06 21:28:28,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:28,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:28,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:28,200 INFO L87 Difference]: Start difference. First operand 2230 states and 10133 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-10-06 21:28:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:28,538 INFO L93 Difference]: Finished difference Result 3204 states and 13596 transitions. [2021-10-06 21:28:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:28:28,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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 26 [2021-10-06 21:28:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:28,549 INFO L225 Difference]: With dead ends: 3204 [2021-10-06 21:28:28,549 INFO L226 Difference]: Without dead ends: 3074 [2021-10-06 21:28:28,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-10-06 21:28:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2366. [2021-10-06 21:28:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2365 states have (on average 4.565327695560254) internal successors, (10797), 2365 states have internal predecessors, (10797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 10797 transitions. [2021-10-06 21:28:28,689 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 10797 transitions. Word has length 26 [2021-10-06 21:28:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:28,690 INFO L470 AbstractCegarLoop]: Abstraction has 2366 states and 10797 transitions. [2021-10-06 21:28:28,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-10-06 21:28:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 10797 transitions. [2021-10-06 21:28:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:28,699 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:28,699 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:28,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-10-06 21:28:28,911 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 [2021-10-06 21:28:28,911 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:28,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:28,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1503295605, now seen corresponding path program 9 times [2021-10-06 21:28:28,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:28,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516550417] [2021-10-06 21:28:28,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:28:28,913 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:28,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:28,914 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) [2021-10-06 21:28:28,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-06 21:28:29,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:28:29,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:29,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 21:28:29,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:29,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:29,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:29,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516550417] [2021-10-06 21:28:29,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516550417] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:28:29,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:28:29,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 21:28:29,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644046376] [2021-10-06 21:28:29,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 21:28:29,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:29,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 21:28:29,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-06 21:28:29,397 INFO L87 Difference]: Start difference. First operand 2366 states and 10797 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-10-06 21:28:29,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:29,863 INFO L93 Difference]: Finished difference Result 4222 states and 18477 transitions. [2021-10-06 21:28:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:28:29,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 26 [2021-10-06 21:28:29,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:29,880 INFO L225 Difference]: With dead ends: 4222 [2021-10-06 21:28:29,881 INFO L226 Difference]: Without dead ends: 4080 [2021-10-06 21:28:29,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:28:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2021-10-06 21:28:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 2162. [2021-10-06 21:28:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 4.578435909301249) internal successors, (9894), 2161 states have internal predecessors, (9894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 9894 transitions. [2021-10-06 21:28:30,007 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 9894 transitions. Word has length 26 [2021-10-06 21:28:30,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:30,008 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 9894 transitions. [2021-10-06 21:28:30,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-10-06 21:28:30,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 9894 transitions. [2021-10-06 21:28:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:30,017 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:30,018 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:30,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:30,231 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 [2021-10-06 21:28:30,232 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:30,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:30,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1404321607, now seen corresponding path program 10 times [2021-10-06 21:28:30,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:30,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279912428] [2021-10-06 21:28:30,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:28:30,234 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:30,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:30,236 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) [2021-10-06 21:28:30,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-06 21:28:30,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:28:30,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:30,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-06 21:28:30,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:30,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:30,705 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:30,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279912428] [2021-10-06 21:28:30,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279912428] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:28:30,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:28:30,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 21:28:30,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566489370] [2021-10-06 21:28:30,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 21:28:30,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:30,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 21:28:30,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-06 21:28:30,706 INFO L87 Difference]: Start difference. First operand 2162 states and 9894 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-10-06 21:28:31,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:31,115 INFO L93 Difference]: Finished difference Result 3656 states and 15916 transitions. [2021-10-06 21:28:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 21:28:31,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 26 [2021-10-06 21:28:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:31,126 INFO L225 Difference]: With dead ends: 3656 [2021-10-06 21:28:31,126 INFO L226 Difference]: Without dead ends: 3356 [2021-10-06 21:28:31,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:31,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-10-06 21:28:31,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 1908. [2021-10-06 21:28:31,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 4.471421080230729) internal successors, (8527), 1907 states have internal predecessors, (8527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 8527 transitions. [2021-10-06 21:28:31,212 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 8527 transitions. Word has length 26 [2021-10-06 21:28:31,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:31,213 INFO L470 AbstractCegarLoop]: Abstraction has 1908 states and 8527 transitions. [2021-10-06 21:28:31,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-10-06 21:28:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 8527 transitions. [2021-10-06 21:28:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:31,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:31,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:31,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:31,433 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 [2021-10-06 21:28:31,434 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:31,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:31,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2018263359, now seen corresponding path program 9 times [2021-10-06 21:28:31,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:31,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93307661] [2021-10-06 21:28:31,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:28:31,436 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:31,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:31,437 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) [2021-10-06 21:28:31,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-06 21:28:31,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:28:31,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:31,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:31,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:31,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:31,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93307661] [2021-10-06 21:28:31,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93307661] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:31,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:31,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:31,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225214667] [2021-10-06 21:28:31,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:31,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:31,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:31,892 INFO L87 Difference]: Start difference. First operand 1908 states and 8527 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-10-06 21:28:32,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:32,244 INFO L93 Difference]: Finished difference Result 2990 states and 12765 transitions. [2021-10-06 21:28:32,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:28:32,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 26 [2021-10-06 21:28:32,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:32,253 INFO L225 Difference]: With dead ends: 2990 [2021-10-06 21:28:32,253 INFO L226 Difference]: Without dead ends: 2966 [2021-10-06 21:28:32,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2966 states. [2021-10-06 21:28:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2966 to 1912. [2021-10-06 21:28:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 4.490319204604919) internal successors, (8581), 1911 states have internal predecessors, (8581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 8581 transitions. [2021-10-06 21:28:32,348 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 8581 transitions. Word has length 26 [2021-10-06 21:28:32,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:32,348 INFO L470 AbstractCegarLoop]: Abstraction has 1912 states and 8581 transitions. [2021-10-06 21:28:32,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-10-06 21:28:32,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 8581 transitions. [2021-10-06 21:28:32,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:32,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:32,356 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:32,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:32,571 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 [2021-10-06 21:28:32,572 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:32,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1588659891, now seen corresponding path program 10 times [2021-10-06 21:28:32,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:32,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58765681] [2021-10-06 21:28:32,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:28:32,574 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:32,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:32,575 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) [2021-10-06 21:28:32,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-06 21:28:32,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:28:32,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:32,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:32,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:32,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:32,970 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:32,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58765681] [2021-10-06 21:28:32,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58765681] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:32,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:32,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:32,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125083148] [2021-10-06 21:28:32,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:32,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:32,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:32,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:32,972 INFO L87 Difference]: Start difference. First operand 1912 states and 8581 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-10-06 21:28:33,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:33,226 INFO L93 Difference]: Finished difference Result 2528 states and 11128 transitions. [2021-10-06 21:28:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 21:28:33,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 26 [2021-10-06 21:28:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:33,235 INFO L225 Difference]: With dead ends: 2528 [2021-10-06 21:28:33,235 INFO L226 Difference]: Without dead ends: 2452 [2021-10-06 21:28:33,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:28:33,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-10-06 21:28:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1898. [2021-10-06 21:28:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 4.501845018450185) internal successors, (8540), 1897 states have internal predecessors, (8540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 8540 transitions. [2021-10-06 21:28:33,315 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 8540 transitions. Word has length 26 [2021-10-06 21:28:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:33,315 INFO L470 AbstractCegarLoop]: Abstraction has 1898 states and 8540 transitions. [2021-10-06 21:28:33,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-10-06 21:28:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 8540 transitions. [2021-10-06 21:28:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:33,320 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:33,320 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:33,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:33,521 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 [2021-10-06 21:28:33,521 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:33,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:33,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1170606593, now seen corresponding path program 11 times [2021-10-06 21:28:33,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:33,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232553295] [2021-10-06 21:28:33,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:28:33,523 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:33,525 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) [2021-10-06 21:28:33,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-06 21:28:33,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:28:33,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:33,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:33,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:33,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:33,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232553295] [2021-10-06 21:28:33,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232553295] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:33,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:33,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:33,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215095200] [2021-10-06 21:28:33,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:33,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:33,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:33,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:33,931 INFO L87 Difference]: Start difference. First operand 1898 states and 8540 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-10-06 21:28:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:34,217 INFO L93 Difference]: Finished difference Result 3166 states and 13837 transitions. [2021-10-06 21:28:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 21:28:34,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 26 [2021-10-06 21:28:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:34,227 INFO L225 Difference]: With dead ends: 3166 [2021-10-06 21:28:34,227 INFO L226 Difference]: Without dead ends: 3166 [2021-10-06 21:28:34,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:28:34,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2021-10-06 21:28:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 2036. [2021-10-06 21:28:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 4.606388206388206) internal successors, (9374), 2035 states have internal predecessors, (9374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 9374 transitions. [2021-10-06 21:28:34,363 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 9374 transitions. Word has length 26 [2021-10-06 21:28:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:34,364 INFO L470 AbstractCegarLoop]: Abstraction has 2036 states and 9374 transitions. [2021-10-06 21:28:34,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-10-06 21:28:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 9374 transitions. [2021-10-06 21:28:34,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:34,374 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:34,374 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:34,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:34,587 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 [2021-10-06 21:28:34,587 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:34,588 INFO L82 PathProgramCache]: Analyzing trace with hash 472813055, now seen corresponding path program 12 times [2021-10-06 21:28:34,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:34,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958277239] [2021-10-06 21:28:34,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:28:34,590 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:34,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:34,591 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) [2021-10-06 21:28:34,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-06 21:28:34,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 21:28:34,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:34,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:34,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:34,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:35,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:35,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958277239] [2021-10-06 21:28:35,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958277239] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:35,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:35,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 21:28:35,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429840382] [2021-10-06 21:28:35,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 21:28:35,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:35,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 21:28:35,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:28:35,069 INFO L87 Difference]: Start difference. First operand 2036 states and 9374 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-10-06 21:28:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:35,354 INFO L93 Difference]: Finished difference Result 2270 states and 10250 transitions. [2021-10-06 21:28:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 21:28:35,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 26 [2021-10-06 21:28:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:35,363 INFO L225 Difference]: With dead ends: 2270 [2021-10-06 21:28:35,363 INFO L226 Difference]: Without dead ends: 2234 [2021-10-06 21:28:35,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:28:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-10-06 21:28:35,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2024. [2021-10-06 21:28:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 4.615422639644093) internal successors, (9337), 2023 states have internal predecessors, (9337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 9337 transitions. [2021-10-06 21:28:35,435 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 9337 transitions. Word has length 26 [2021-10-06 21:28:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:35,436 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 9337 transitions. [2021-10-06 21:28:35,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-10-06 21:28:35,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 9337 transitions. [2021-10-06 21:28:35,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:35,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:35,444 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:35,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-10-06 21:28:35,657 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 [2021-10-06 21:28:35,657 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:35,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1821326231, now seen corresponding path program 13 times [2021-10-06 21:28:35,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:35,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662698016] [2021-10-06 21:28:35,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:28:35,659 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:35,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:35,660 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) [2021-10-06 21:28:35,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-06 21:28:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:35,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:35,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:35,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:36,082 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:36,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662698016] [2021-10-06 21:28:36,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662698016] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:36,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:36,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:36,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205190875] [2021-10-06 21:28:36,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:36,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:36,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:36,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:36,084 INFO L87 Difference]: Start difference. First operand 2024 states and 9337 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-10-06 21:28:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:36,243 INFO L93 Difference]: Finished difference Result 2128 states and 9470 transitions. [2021-10-06 21:28:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 21:28:36,244 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 26 [2021-10-06 21:28:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:36,249 INFO L225 Difference]: With dead ends: 2128 [2021-10-06 21:28:36,249 INFO L226 Difference]: Without dead ends: 2046 [2021-10-06 21:28:36,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-06 21:28:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-10-06 21:28:36,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1730. [2021-10-06 21:28:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 4.540196645459804) internal successors, (7850), 1729 states have internal predecessors, (7850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 7850 transitions. [2021-10-06 21:28:36,286 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 7850 transitions. Word has length 26 [2021-10-06 21:28:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:36,287 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 7850 transitions. [2021-10-06 21:28:36,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-10-06 21:28:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 7850 transitions. [2021-10-06 21:28:36,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-06 21:28:36,292 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:36,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:36,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:36,492 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 [2021-10-06 21:28:36,493 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:36,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1693706327, now seen corresponding path program 14 times [2021-10-06 21:28:36,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:36,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034492135] [2021-10-06 21:28:36,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:28:36,495 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:36,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:36,497 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) [2021-10-06 21:28:36,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-06 21:28:36,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:28:36,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:36,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:36,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:36,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:37,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:37,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034492135] [2021-10-06 21:28:37,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034492135] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:37,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:37,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-06 21:28:37,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98780503] [2021-10-06 21:28:37,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:37,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:37,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:37,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:37,013 INFO L87 Difference]: Start difference. First operand 1730 states and 7850 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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) [2021-10-06 21:28:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:37,362 INFO L93 Difference]: Finished difference Result 2100 states and 9429 transitions. [2021-10-06 21:28:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-06 21:28:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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 26 [2021-10-06 21:28:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:37,368 INFO L225 Difference]: With dead ends: 2100 [2021-10-06 21:28:37,369 INFO L226 Difference]: Without dead ends: 2076 [2021-10-06 21:28:37,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:37,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-10-06 21:28:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1572. [2021-10-06 21:28:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 4.667091024824952) internal successors, (7332), 1571 states have internal predecessors, (7332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 7332 transitions. [2021-10-06 21:28:37,409 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 7332 transitions. Word has length 26 [2021-10-06 21:28:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:37,409 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 7332 transitions. [2021-10-06 21:28:37,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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) [2021-10-06 21:28:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 7332 transitions. [2021-10-06 21:28:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-06 21:28:37,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:37,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:37,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:37,614 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 [2021-10-06 21:28:37,615 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:37,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1724657166, now seen corresponding path program 1 times [2021-10-06 21:28:37,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:37,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593241601] [2021-10-06 21:28:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:37,617 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:37,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:37,619 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) [2021-10-06 21:28:37,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-06 21:28:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:37,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:28:37,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:38,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:38,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:38,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593241601] [2021-10-06 21:28:38,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593241601] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-06 21:28:38,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 21:28:38,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2021-10-06 21:28:38,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813717862] [2021-10-06 21:28:38,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-06 21:28:38,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-06 21:28:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:38,401 INFO L87 Difference]: Start difference. First operand 1572 states and 7332 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-10-06 21:28:38,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:38,534 INFO L93 Difference]: Finished difference Result 3441 states and 15004 transitions. [2021-10-06 21:28:38,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-06 21:28:38,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 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 27 [2021-10-06 21:28:38,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:38,548 INFO L225 Difference]: With dead ends: 3441 [2021-10-06 21:28:38,548 INFO L226 Difference]: Without dead ends: 3200 [2021-10-06 21:28:38,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:38,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2021-10-06 21:28:38,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 2934. [2021-10-06 21:28:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2934 states, 2933 states have (on average 4.48073644732356) internal successors, (13142), 2933 states have internal predecessors, (13142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 13142 transitions. [2021-10-06 21:28:38,623 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 13142 transitions. Word has length 27 [2021-10-06 21:28:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:38,623 INFO L470 AbstractCegarLoop]: Abstraction has 2934 states and 13142 transitions. [2021-10-06 21:28:38,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-10-06 21:28:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 13142 transitions. [2021-10-06 21:28:38,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-06 21:28:38,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:38,632 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:38,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:38,832 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 [2021-10-06 21:28:38,833 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:38,834 INFO L82 PathProgramCache]: Analyzing trace with hash -518433906, now seen corresponding path program 2 times [2021-10-06 21:28:38,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:38,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558668775] [2021-10-06 21:28:38,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:28:38,835 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:38,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:38,837 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) [2021-10-06 21:28:38,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-06 21:28:39,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:28:39,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:28:39,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:39,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:39,508 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:39,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558668775] [2021-10-06 21:28:39,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558668775] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:28:39,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:28:39,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:28:39,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006492734] [2021-10-06 21:28:39,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:28:39,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:39,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:28:39,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:28:39,510 INFO L87 Difference]: Start difference. First operand 2934 states and 13142 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:40,202 INFO L93 Difference]: Finished difference Result 7942 states and 33467 transitions. [2021-10-06 21:28:40,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-06 21:28:40,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-10-06 21:28:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:40,235 INFO L225 Difference]: With dead ends: 7942 [2021-10-06 21:28:40,235 INFO L226 Difference]: Without dead ends: 7738 [2021-10-06 21:28:40,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-10-06 21:28:40,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7738 states. [2021-10-06 21:28:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7738 to 3524. [2021-10-06 21:28:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3523 states have (on average 4.54413851830826) internal successors, (16009), 3523 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 16009 transitions. [2021-10-06 21:28:40,411 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 16009 transitions. Word has length 28 [2021-10-06 21:28:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:40,412 INFO L470 AbstractCegarLoop]: Abstraction has 3524 states and 16009 transitions. [2021-10-06 21:28:40,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 16009 transitions. [2021-10-06 21:28:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-06 21:28:40,421 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:40,421 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:40,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:40,621 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 [2021-10-06 21:28:40,622 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:40,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:40,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1635531056, now seen corresponding path program 1 times [2021-10-06 21:28:40,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:40,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625783244] [2021-10-06 21:28:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:40,625 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:40,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:40,626 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) [2021-10-06 21:28:40,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-06 21:28:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:40,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:28:40,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:41,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:41,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:41,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625783244] [2021-10-06 21:28:41,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625783244] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:28:41,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:28:41,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-06 21:28:41,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86621006] [2021-10-06 21:28:41,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-06 21:28:41,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:41,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-06 21:28:41,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:41,272 INFO L87 Difference]: Start difference. First operand 3524 states and 16009 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:42,506 INFO L93 Difference]: Finished difference Result 10416 states and 46831 transitions. [2021-10-06 21:28:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-06 21:28:42,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 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 28 [2021-10-06 21:28:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:42,568 INFO L225 Difference]: With dead ends: 10416 [2021-10-06 21:28:42,568 INFO L226 Difference]: Without dead ends: 10084 [2021-10-06 21:28:42,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-10-06 21:28:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10084 states. [2021-10-06 21:28:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10084 to 3520. [2021-10-06 21:28:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 4.541062801932367) internal successors, (15980), 3519 states have internal predecessors, (15980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 15980 transitions. [2021-10-06 21:28:42,728 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 15980 transitions. Word has length 28 [2021-10-06 21:28:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:42,728 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 15980 transitions. [2021-10-06 21:28:42,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 15980 transitions. [2021-10-06 21:28:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-06 21:28:42,737 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:42,737 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:42,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:42,938 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 [2021-10-06 21:28:42,938 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:42,939 INFO L82 PathProgramCache]: Analyzing trace with hash 390392126, now seen corresponding path program 3 times [2021-10-06 21:28:42,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:42,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943972208] [2021-10-06 21:28:42,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:28:42,941 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:42,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:42,942 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) [2021-10-06 21:28:42,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-06 21:28:43,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:28:43,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:43,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-06 21:28:43,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:43,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:43,571 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:43,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943972208] [2021-10-06 21:28:43,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943972208] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:28:43,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:28:43,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-06 21:28:43,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922709435] [2021-10-06 21:28:43,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-06 21:28:43,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:43,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-06 21:28:43,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-06 21:28:43,573 INFO L87 Difference]: Start difference. First operand 3520 states and 15980 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:44,217 INFO L93 Difference]: Finished difference Result 5344 states and 23028 transitions. [2021-10-06 21:28:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-06 21:28:44,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 28 [2021-10-06 21:28:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:44,233 INFO L225 Difference]: With dead ends: 5344 [2021-10-06 21:28:44,233 INFO L226 Difference]: Without dead ends: 5166 [2021-10-06 21:28:44,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:28:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-10-06 21:28:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4078. [2021-10-06 21:28:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 4.543291636006868) internal successors, (18523), 4077 states have internal predecessors, (18523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:44,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 18523 transitions. [2021-10-06 21:28:44,344 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 18523 transitions. Word has length 28 [2021-10-06 21:28:44,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:44,344 INFO L470 AbstractCegarLoop]: Abstraction has 4078 states and 18523 transitions. [2021-10-06 21:28:44,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:44,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 18523 transitions. [2021-10-06 21:28:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-06 21:28:44,355 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:44,355 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:44,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:44,556 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 [2021-10-06 21:28:44,556 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1907737546, now seen corresponding path program 4 times [2021-10-06 21:28:44,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:44,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223609833] [2021-10-06 21:28:44,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:28:44,558 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:44,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:44,560 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) [2021-10-06 21:28:44,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-06 21:28:44,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:28:44,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:44,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:28:44,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:45,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:45,264 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:45,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223609833] [2021-10-06 21:28:45,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223609833] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:28:45,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:28:45,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-06 21:28:45,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408334574] [2021-10-06 21:28:45,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-06 21:28:45,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:45,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-06 21:28:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:45,266 INFO L87 Difference]: Start difference. First operand 4078 states and 18523 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:46,948 INFO L93 Difference]: Finished difference Result 9848 states and 44020 transitions. [2021-10-06 21:28:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-06 21:28:46,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 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 28 [2021-10-06 21:28:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:46,980 INFO L225 Difference]: With dead ends: 9848 [2021-10-06 21:28:46,980 INFO L226 Difference]: Without dead ends: 9684 [2021-10-06 21:28:46,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 815.0ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-10-06 21:28:46,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9684 states. [2021-10-06 21:28:47,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9684 to 4582. [2021-10-06 21:28:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4581 states have (on average 4.643527614058066) internal successors, (21272), 4581 states have internal predecessors, (21272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 21272 transitions. [2021-10-06 21:28:47,258 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 21272 transitions. Word has length 28 [2021-10-06 21:28:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:47,258 INFO L470 AbstractCegarLoop]: Abstraction has 4582 states and 21272 transitions. [2021-10-06 21:28:47,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 21272 transitions. [2021-10-06 21:28:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-06 21:28:47,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:47,271 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:47,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:47,471 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 [2021-10-06 21:28:47,472 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:47,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:47,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1046151936, now seen corresponding path program 5 times [2021-10-06 21:28:47,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:47,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942339527] [2021-10-06 21:28:47,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:28:47,474 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:47,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:47,475 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) [2021-10-06 21:28:47,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-06 21:28:47,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:28:47,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:47,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:47,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:47,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:47,987 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:47,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942339527] [2021-10-06 21:28:47,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942339527] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:28:47,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:28:47,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-06 21:28:47,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555582687] [2021-10-06 21:28:47,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:47,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:47,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:47,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:47,990 INFO L87 Difference]: Start difference. First operand 4582 states and 21272 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:48,314 INFO L93 Difference]: Finished difference Result 6822 states and 30772 transitions. [2021-10-06 21:28:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 21:28:48,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 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 28 [2021-10-06 21:28:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:48,349 INFO L225 Difference]: With dead ends: 6822 [2021-10-06 21:28:48,349 INFO L226 Difference]: Without dead ends: 6738 [2021-10-06 21:28:48,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:28:48,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6738 states. [2021-10-06 21:28:48,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6738 to 4624. [2021-10-06 21:28:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4624 states, 4623 states have (on average 4.643305213065109) internal successors, (21466), 4623 states have internal predecessors, (21466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 21466 transitions. [2021-10-06 21:28:48,563 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 21466 transitions. Word has length 28 [2021-10-06 21:28:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:48,563 INFO L470 AbstractCegarLoop]: Abstraction has 4624 states and 21466 transitions. [2021-10-06 21:28:48,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 21466 transitions. [2021-10-06 21:28:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-06 21:28:48,582 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:48,582 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:48,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:48,796 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 [2021-10-06 21:28:48,796 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:48,797 INFO L82 PathProgramCache]: Analyzing trace with hash 519956338, now seen corresponding path program 6 times [2021-10-06 21:28:48,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:48,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293501320] [2021-10-06 21:28:48,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:28:48,798 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:48,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:48,800 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) [2021-10-06 21:28:48,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-06 21:28:49,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-06 21:28:49,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:49,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:49,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:49,392 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:49,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293501320] [2021-10-06 21:28:49,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293501320] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:28:49,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:28:49,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-06 21:28:49,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562462618] [2021-10-06 21:28:49,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-06 21:28:49,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:49,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-06 21:28:49,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-06 21:28:49,394 INFO L87 Difference]: Start difference. First operand 4624 states and 21466 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:49,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:49,679 INFO L93 Difference]: Finished difference Result 6424 states and 29187 transitions. [2021-10-06 21:28:49,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-06 21:28:49,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 28 [2021-10-06 21:28:49,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:49,699 INFO L225 Difference]: With dead ends: 6424 [2021-10-06 21:28:49,699 INFO L226 Difference]: Without dead ends: 6348 [2021-10-06 21:28:49,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:28:49,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6348 states. [2021-10-06 21:28:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6348 to 4988. [2021-10-06 21:28:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 4.680970523360738) internal successors, (23344), 4987 states have internal predecessors, (23344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 23344 transitions. [2021-10-06 21:28:49,835 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 23344 transitions. Word has length 28 [2021-10-06 21:28:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:49,835 INFO L470 AbstractCegarLoop]: Abstraction has 4988 states and 23344 transitions. [2021-10-06 21:28:49,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 23344 transitions. [2021-10-06 21:28:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-06 21:28:49,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:49,850 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:49,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:50,051 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 [2021-10-06 21:28:50,051 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:50,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1852186146, now seen corresponding path program 7 times [2021-10-06 21:28:50,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:50,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698013984] [2021-10-06 21:28:50,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:28:50,053 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:50,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:50,054 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) [2021-10-06 21:28:50,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-06 21:28:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:50,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-06 21:28:50,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:28:50,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:28:50,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:50,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698013984] [2021-10-06 21:28:50,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698013984] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-06 21:28:50,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-06 21:28:50,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-06 21:28:50,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805443952] [2021-10-06 21:28:50,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-06 21:28:50,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:50,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-06 21:28:50,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-06 21:28:50,538 INFO L87 Difference]: Start difference. First operand 4988 states and 23344 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2021-10-06 21:28:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:50,784 INFO L93 Difference]: Finished difference Result 5846 states and 27107 transitions. [2021-10-06 21:28:50,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 21:28:50,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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 28 [2021-10-06 21:28:50,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:50,818 INFO L225 Difference]: With dead ends: 5846 [2021-10-06 21:28:50,818 INFO L226 Difference]: Without dead ends: 5794 [2021-10-06 21:28:50,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-06 21:28:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5794 states. [2021-10-06 21:28:50,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5794 to 4888. [2021-10-06 21:28:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4887 states have (on average 4.665643544096583) internal successors, (22801), 4887 states have internal predecessors, (22801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 22801 transitions. [2021-10-06 21:28:51,004 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 22801 transitions. Word has length 28 [2021-10-06 21:28:51,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:51,004 INFO L470 AbstractCegarLoop]: Abstraction has 4888 states and 22801 transitions. [2021-10-06 21:28:51,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2021-10-06 21:28:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 22801 transitions. [2021-10-06 21:28:51,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-06 21:28:51,020 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:51,020 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:51,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-10-06 21:28:51,233 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 [2021-10-06 21:28:51,234 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash -165934296, now seen corresponding path program 2 times [2021-10-06 21:28:51,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:51,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549852595] [2021-10-06 21:28:51,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:28:51,235 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:51,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:51,237 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) [2021-10-06 21:28:51,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-06 21:28:51,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:28:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:51,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:28:51,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:51,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:28:51,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:51,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549852595] [2021-10-06 21:28:51,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549852595] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-06 21:28:51,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 21:28:51,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-10-06 21:28:51,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121900659] [2021-10-06 21:28:51,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-06 21:28:51,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:51,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-06 21:28:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:28:51,958 INFO L87 Difference]: Start difference. First operand 4888 states and 22801 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2021-10-06 21:28:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:52,241 INFO L93 Difference]: Finished difference Result 6712 states and 29697 transitions. [2021-10-06 21:28:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-06 21:28:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 28 [2021-10-06 21:28:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:52,260 INFO L225 Difference]: With dead ends: 6712 [2021-10-06 21:28:52,260 INFO L226 Difference]: Without dead ends: 6640 [2021-10-06 21:28:52,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:28:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6640 states. [2021-10-06 21:28:52,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6640 to 4420. [2021-10-06 21:28:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4419 states have (on average 4.606472052500566) internal successors, (20356), 4419 states have internal predecessors, (20356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 20356 transitions. [2021-10-06 21:28:52,378 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 20356 transitions. Word has length 28 [2021-10-06 21:28:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:52,379 INFO L470 AbstractCegarLoop]: Abstraction has 4420 states and 20356 transitions. [2021-10-06 21:28:52,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2021-10-06 21:28:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 20356 transitions. [2021-10-06 21:28:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-06 21:28:52,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:52,390 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:52,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:52,598 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 [2021-10-06 21:28:52,599 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:52,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1413378860, now seen corresponding path program 3 times [2021-10-06 21:28:52,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:52,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510441827] [2021-10-06 21:28:52,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:28:52,601 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:52,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:52,602 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) [2021-10-06 21:28:52,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-06 21:28:53,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:28:53,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:53,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:28:53,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:53,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:28:53,314 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:53,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510441827] [2021-10-06 21:28:53,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510441827] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-06 21:28:53,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-06 21:28:53,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-10-06 21:28:53,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754431495] [2021-10-06 21:28:53,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-06 21:28:53,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:53,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-06 21:28:53,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:28:53,317 INFO L87 Difference]: Start difference. First operand 4420 states and 20356 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2021-10-06 21:28:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:53,596 INFO L93 Difference]: Finished difference Result 4966 states and 22598 transitions. [2021-10-06 21:28:53,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-06 21:28:53,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 28 [2021-10-06 21:28:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:53,614 INFO L225 Difference]: With dead ends: 4966 [2021-10-06 21:28:53,614 INFO L226 Difference]: Without dead ends: 4966 [2021-10-06 21:28:53,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:28:53,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4966 states. [2021-10-06 21:28:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4966 to 4010. [2021-10-06 21:28:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4010 states, 4009 states have (on average 4.619107009229234) internal successors, (18518), 4009 states have internal predecessors, (18518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4010 states to 4010 states and 18518 transitions. [2021-10-06 21:28:53,749 INFO L78 Accepts]: Start accepts. Automaton has 4010 states and 18518 transitions. Word has length 28 [2021-10-06 21:28:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:53,749 INFO L470 AbstractCegarLoop]: Abstraction has 4010 states and 18518 transitions. [2021-10-06 21:28:53,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2021-10-06 21:28:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4010 states and 18518 transitions. [2021-10-06 21:28:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-06 21:28:53,763 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:53,763 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:53,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:53,963 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 [2021-10-06 21:28:53,964 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:53,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1274391663, now seen corresponding path program 1 times [2021-10-06 21:28:53,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:53,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333444625] [2021-10-06 21:28:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:28:53,966 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:53,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:53,967 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) [2021-10-06 21:28:53,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-06 21:28:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:28:54,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-06 21:28:54,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:54,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:28:55,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:55,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333444625] [2021-10-06 21:28:55,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333444625] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:28:55,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:28:55,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-06 21:28:55,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676707012] [2021-10-06 21:28:55,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:28:55,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:55,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:28:55,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:28:55,300 INFO L87 Difference]: Start difference. First operand 4010 states and 18518 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:55,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:55,855 INFO L93 Difference]: Finished difference Result 8545 states and 38986 transitions. [2021-10-06 21:28:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-06 21:28:55,856 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 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 29 [2021-10-06 21:28:55,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:55,883 INFO L225 Difference]: With dead ends: 8545 [2021-10-06 21:28:55,883 INFO L226 Difference]: Without dead ends: 8246 [2021-10-06 21:28:55,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:28:55,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2021-10-06 21:28:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 5446. [2021-10-06 21:28:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5446 states, 5445 states have (on average 4.704499540863178) internal successors, (25616), 5445 states have internal predecessors, (25616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 25616 transitions. [2021-10-06 21:28:56,046 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 25616 transitions. Word has length 29 [2021-10-06 21:28:56,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:56,047 INFO L470 AbstractCegarLoop]: Abstraction has 5446 states and 25616 transitions. [2021-10-06 21:28:56,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 25616 transitions. [2021-10-06 21:28:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:28:56,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:56,064 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:56,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-10-06 21:28:56,275 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 [2021-10-06 21:28:56,276 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:56,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:56,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2108289069, now seen corresponding path program 2 times [2021-10-06 21:28:56,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:56,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060815002] [2021-10-06 21:28:56,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:28:56,278 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:56,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:56,279 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) [2021-10-06 21:28:56,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-10-06 21:28:56,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:28:56,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:28:56,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:28:56,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:28:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:56,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:28:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:28:57,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:28:57,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060815002] [2021-10-06 21:28:57,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060815002] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:28:57,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:28:57,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-06 21:28:57,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131930569] [2021-10-06 21:28:57,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-06 21:28:57,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:28:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-06 21:28:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-06 21:28:57,219 INFO L87 Difference]: Start difference. First operand 5446 states and 25616 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:28:59,157 INFO L93 Difference]: Finished difference Result 23374 states and 102613 transitions. [2021-10-06 21:28:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-06 21:28:59,158 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 30 [2021-10-06 21:28:59,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:28:59,239 INFO L225 Difference]: With dead ends: 23374 [2021-10-06 21:28:59,240 INFO L226 Difference]: Without dead ends: 22714 [2021-10-06 21:28:59,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 994.5ms TimeCoverageRelationStatistics Valid=342, Invalid=1064, Unknown=0, NotChecked=0, Total=1406 [2021-10-06 21:28:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22714 states. [2021-10-06 21:28:59,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22714 to 8004. [2021-10-06 21:28:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8004 states, 8003 states have (on average 4.569411470698488) internal successors, (36569), 8003 states have internal predecessors, (36569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8004 states to 8004 states and 36569 transitions. [2021-10-06 21:28:59,722 INFO L78 Accepts]: Start accepts. Automaton has 8004 states and 36569 transitions. Word has length 30 [2021-10-06 21:28:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:28:59,722 INFO L470 AbstractCegarLoop]: Abstraction has 8004 states and 36569 transitions. [2021-10-06 21:28:59,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:28:59,722 INFO L276 IsEmpty]: Start isEmpty. Operand 8004 states and 36569 transitions. [2021-10-06 21:28:59,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:28:59,741 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:28:59,741 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:28:59,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-10-06 21:28:59,941 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 [2021-10-06 21:28:59,942 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:28:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:28:59,943 INFO L82 PathProgramCache]: Analyzing trace with hash 574927339, now seen corresponding path program 3 times [2021-10-06 21:28:59,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:28:59,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127525691] [2021-10-06 21:28:59,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:28:59,944 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:28:59,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:28:59,945 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) [2021-10-06 21:28:59,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-06 21:29:00,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:29:00,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:29:00,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:29:00,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:29:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:29:00,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:29:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:29:00,706 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:29:00,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127525691] [2021-10-06 21:29:00,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127525691] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:29:00,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:29:00,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-06 21:29:00,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500719408] [2021-10-06 21:29:00,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-06 21:29:00,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:29:00,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-06 21:29:00,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-06 21:29:00,708 INFO L87 Difference]: Start difference. First operand 8004 states and 36569 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:29:01,412 INFO L93 Difference]: Finished difference Result 10312 states and 45772 transitions. [2021-10-06 21:29:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-06 21:29:01,415 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 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 30 [2021-10-06 21:29:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:29:01,453 INFO L225 Difference]: With dead ends: 10312 [2021-10-06 21:29:01,454 INFO L226 Difference]: Without dead ends: 9826 [2021-10-06 21:29:01,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:29:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9826 states. [2021-10-06 21:29:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9826 to 7966. [2021-10-06 21:29:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7966 states, 7965 states have (on average 4.57112366603892) internal successors, (36409), 7965 states have internal predecessors, (36409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7966 states to 7966 states and 36409 transitions. [2021-10-06 21:29:01,737 INFO L78 Accepts]: Start accepts. Automaton has 7966 states and 36409 transitions. Word has length 30 [2021-10-06 21:29:01,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:29:01,738 INFO L470 AbstractCegarLoop]: Abstraction has 7966 states and 36409 transitions. [2021-10-06 21:29:01,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 7966 states and 36409 transitions. [2021-10-06 21:29:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:29:01,756 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:29:01,757 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:29:01,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-10-06 21:29:01,957 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 [2021-10-06 21:29:01,957 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:29:01,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:29:01,958 INFO L82 PathProgramCache]: Analyzing trace with hash -304931531, now seen corresponding path program 4 times [2021-10-06 21:29:01,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:29:01,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702797212] [2021-10-06 21:29:01,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:29:01,960 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:29:01,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:29:01,961 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) [2021-10-06 21:29:01,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-06 21:29:02,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:29:02,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:29:02,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:29:02,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:29:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:29:02,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:29:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:29:02,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:29:02,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702797212] [2021-10-06 21:29:02,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702797212] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:29:02,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:29:02,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:29:02,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401139303] [2021-10-06 21:29:02,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:29:02,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:29:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:29:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:29:02,961 INFO L87 Difference]: Start difference. First operand 7966 states and 36409 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-10-06 21:29:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:29:03,982 INFO L93 Difference]: Finished difference Result 13928 states and 62992 transitions. [2021-10-06 21:29:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:29:03,983 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 30 [2021-10-06 21:29:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:29:04,034 INFO L225 Difference]: With dead ends: 13928 [2021-10-06 21:29:04,034 INFO L226 Difference]: Without dead ends: 13792 [2021-10-06 21:29:04,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:29:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13792 states. [2021-10-06 21:29:04,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13792 to 10094. [2021-10-06 21:29:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 10093 states have (on average 4.751411869612602) internal successors, (47956), 10093 states have internal predecessors, (47956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 47956 transitions. [2021-10-06 21:29:04,486 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 47956 transitions. Word has length 30 [2021-10-06 21:29:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:29:04,486 INFO L470 AbstractCegarLoop]: Abstraction has 10094 states and 47956 transitions. [2021-10-06 21:29:04,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-10-06 21:29:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 47956 transitions. [2021-10-06 21:29:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:29:04,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:29:04,520 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:29:04,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-10-06 21:29:04,732 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 [2021-10-06 21:29:04,732 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:29:04,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:29:04,733 INFO L82 PathProgramCache]: Analyzing trace with hash 66224563, now seen corresponding path program 5 times [2021-10-06 21:29:04,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:29:04,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755647489] [2021-10-06 21:29:04,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:29:04,735 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:29:04,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:29:04,737 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) [2021-10-06 21:29:04,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-10-06 21:29:05,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:29:05,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:29:05,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:29:05,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:29:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:29:05,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:29:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:29:05,880 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:29:05,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755647489] [2021-10-06 21:29:05,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755647489] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:29:05,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:29:05,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-06 21:29:05,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240949026] [2021-10-06 21:29:05,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 21:29:05,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:29:05,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 21:29:05,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:29:05,882 INFO L87 Difference]: Start difference. First operand 10094 states and 47956 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:29:10,120 INFO L93 Difference]: Finished difference Result 24748 states and 111317 transitions. [2021-10-06 21:29:10,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-06 21:29:10,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2021-10-06 21:29:10,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:29:10,365 INFO L225 Difference]: With dead ends: 24748 [2021-10-06 21:29:10,365 INFO L226 Difference]: Without dead ends: 23386 [2021-10-06 21:29:10,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2461.3ms TimeCoverageRelationStatistics Valid=760, Invalid=2210, Unknown=0, NotChecked=0, Total=2970 [2021-10-06 21:29:10,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23386 states. [2021-10-06 21:29:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23386 to 12956. [2021-10-06 21:29:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12956 states, 12955 states have (on average 4.8735623311462755) internal successors, (63137), 12955 states have internal predecessors, (63137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12956 states to 12956 states and 63137 transitions. [2021-10-06 21:29:10,978 INFO L78 Accepts]: Start accepts. Automaton has 12956 states and 63137 transitions. Word has length 30 [2021-10-06 21:29:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:29:10,978 INFO L470 AbstractCegarLoop]: Abstraction has 12956 states and 63137 transitions. [2021-10-06 21:29:10,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 12956 states and 63137 transitions. [2021-10-06 21:29:11,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:29:11,032 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:29:11,032 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:29:11,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-10-06 21:29:11,245 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 [2021-10-06 21:29:11,246 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:29:11,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:29:11,247 INFO L82 PathProgramCache]: Analyzing trace with hash 771457055, now seen corresponding path program 6 times [2021-10-06 21:29:11,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:29:11,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979279121] [2021-10-06 21:29:11,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:29:11,249 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:29:11,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:29:11,250 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) [2021-10-06 21:29:11,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-10-06 21:29:11,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:29:11,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:29:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-06 21:29:11,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:29:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:29:12,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:29:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:29:12,826 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:29:12,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979279121] [2021-10-06 21:29:12,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979279121] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:29:12,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:29:12,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-06 21:29:12,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160860646] [2021-10-06 21:29:12,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-06 21:29:12,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:29:12,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-06 21:29:12,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:29:12,829 INFO L87 Difference]: Start difference. First operand 12956 states and 63137 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:24,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:29:24,153 INFO L93 Difference]: Finished difference Result 48006 states and 219651 transitions. [2021-10-06 21:29:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-06 21:29:24,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 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 30 [2021-10-06 21:29:24,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:29:24,453 INFO L225 Difference]: With dead ends: 48006 [2021-10-06 21:29:24,454 INFO L226 Difference]: Without dead ends: 47884 [2021-10-06 21:29:24,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 7325.8ms TimeCoverageRelationStatistics Valid=1272, Invalid=4734, Unknown=0, NotChecked=0, Total=6006 [2021-10-06 21:29:24,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47884 states. [2021-10-06 21:29:25,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47884 to 15528. [2021-10-06 21:29:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15528 states, 15527 states have (on average 5.048753783731565) internal successors, (78392), 15527 states have internal predecessors, (78392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15528 states to 15528 states and 78392 transitions. [2021-10-06 21:29:25,813 INFO L78 Accepts]: Start accepts. Automaton has 15528 states and 78392 transitions. Word has length 30 [2021-10-06 21:29:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:29:25,813 INFO L470 AbstractCegarLoop]: Abstraction has 15528 states and 78392 transitions. [2021-10-06 21:29:25,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 15528 states and 78392 transitions. [2021-10-06 21:29:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:29:25,858 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:29:25,858 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:29:25,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-10-06 21:29:26,058 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 [2021-10-06 21:29:26,059 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:29:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:29:26,060 INFO L82 PathProgramCache]: Analyzing trace with hash 408340233, now seen corresponding path program 7 times [2021-10-06 21:29:26,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:29:26,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226652743] [2021-10-06 21:29:26,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:29:26,061 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:29:26,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:29:26,063 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) [2021-10-06 21:29:26,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-10-06 21:29:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:29:26,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:29:26,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:29:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:29:26,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:29:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:29:27,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:29:27,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226652743] [2021-10-06 21:29:27,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226652743] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:29:27,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:29:27,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:29:27,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707705851] [2021-10-06 21:29:27,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:29:27,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:29:27,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:29:27,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:29:27,120 INFO L87 Difference]: Start difference. First operand 15528 states and 78392 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-10-06 21:29:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:29:28,217 INFO L93 Difference]: Finished difference Result 26480 states and 124270 transitions. [2021-10-06 21:29:28,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 21:29:28,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 30 [2021-10-06 21:29:28,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:29:28,339 INFO L225 Difference]: With dead ends: 26480 [2021-10-06 21:29:28,339 INFO L226 Difference]: Without dead ends: 26416 [2021-10-06 21:29:28,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 629.8ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:29:28,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26416 states. [2021-10-06 21:29:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26416 to 15708. [2021-10-06 21:29:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15708 states, 15707 states have (on average 4.977971605016871) internal successors, (78189), 15707 states have internal predecessors, (78189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15708 states to 15708 states and 78189 transitions. [2021-10-06 21:29:29,179 INFO L78 Accepts]: Start accepts. Automaton has 15708 states and 78189 transitions. Word has length 30 [2021-10-06 21:29:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:29:29,179 INFO L470 AbstractCegarLoop]: Abstraction has 15708 states and 78189 transitions. [2021-10-06 21:29:29,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-10-06 21:29:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 15708 states and 78189 transitions. [2021-10-06 21:29:29,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:29:29,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:29:29,235 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:29:29,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-10-06 21:29:29,448 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 [2021-10-06 21:29:29,449 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:29:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:29:29,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1946090315, now seen corresponding path program 8 times [2021-10-06 21:29:29,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:29:29,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096623996] [2021-10-06 21:29:29,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:29:29,451 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:29:29,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:29:29,452 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) [2021-10-06 21:29:29,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-10-06 21:29:30,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:29:30,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:29:30,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:29:30,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:29:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:29:30,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:29:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:29:30,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:29:30,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096623996] [2021-10-06 21:29:30,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096623996] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:29:30,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:29:30,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-10-06 21:29:30,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837514300] [2021-10-06 21:29:30,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-06 21:29:30,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:29:30,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-06 21:29:30,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:29:30,581 INFO L87 Difference]: Start difference. First operand 15708 states and 78189 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:29:33,032 INFO L93 Difference]: Finished difference Result 46048 states and 218573 transitions. [2021-10-06 21:29:33,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-06 21:29:33,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 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 30 [2021-10-06 21:29:33,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:29:33,445 INFO L225 Difference]: With dead ends: 46048 [2021-10-06 21:29:33,445 INFO L226 Difference]: Without dead ends: 45584 [2021-10-06 21:29:33,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1098.6ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-10-06 21:29:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45584 states. [2021-10-06 21:29:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45584 to 21690. [2021-10-06 21:29:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21690 states, 21689 states have (on average 5.261699478998571) internal successors, (114121), 21689 states have internal predecessors, (114121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21690 states to 21690 states and 114121 transitions. [2021-10-06 21:29:35,228 INFO L78 Accepts]: Start accepts. Automaton has 21690 states and 114121 transitions. Word has length 30 [2021-10-06 21:29:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:29:35,230 INFO L470 AbstractCegarLoop]: Abstraction has 21690 states and 114121 transitions. [2021-10-06 21:29:35,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:35,230 INFO L276 IsEmpty]: Start isEmpty. Operand 21690 states and 114121 transitions. [2021-10-06 21:29:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:29:35,312 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:29:35,312 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:29:35,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-10-06 21:29:35,525 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 [2021-10-06 21:29:35,526 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:29:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:29:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1916881785, now seen corresponding path program 9 times [2021-10-06 21:29:35,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:29:35,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442697239] [2021-10-06 21:29:35,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:29:35,528 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:29:35,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:29:35,529 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) [2021-10-06 21:29:35,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-10-06 21:29:36,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:29:36,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:29:36,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:29:36,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:29:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:29:36,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:29:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:29:36,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:29:36,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442697239] [2021-10-06 21:29:36,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442697239] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:29:36,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:29:36,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:29:36,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477963904] [2021-10-06 21:29:36,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:29:36,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:29:36,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:29:36,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:29:36,598 INFO L87 Difference]: Start difference. First operand 21690 states and 114121 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:29:37,815 INFO L93 Difference]: Finished difference Result 28934 states and 146617 transitions. [2021-10-06 21:29:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-06 21:29:37,817 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 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 30 [2021-10-06 21:29:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:29:37,952 INFO L225 Difference]: With dead ends: 28934 [2021-10-06 21:29:37,952 INFO L226 Difference]: Without dead ends: 27788 [2021-10-06 21:29:37,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-10-06 21:29:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27788 states. [2021-10-06 21:29:38,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27788 to 22370. [2021-10-06 21:29:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22370 states, 22369 states have (on average 5.272475300639278) internal successors, (117940), 22369 states have internal predecessors, (117940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22370 states to 22370 states and 117940 transitions. [2021-10-06 21:29:39,039 INFO L78 Accepts]: Start accepts. Automaton has 22370 states and 117940 transitions. Word has length 30 [2021-10-06 21:29:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:29:39,039 INFO L470 AbstractCegarLoop]: Abstraction has 22370 states and 117940 transitions. [2021-10-06 21:29:39,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:39,039 INFO L276 IsEmpty]: Start isEmpty. Operand 22370 states and 117940 transitions. [2021-10-06 21:29:39,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:29:39,333 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:29:39,333 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:29:39,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-10-06 21:29:39,546 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 [2021-10-06 21:29:39,547 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:29:39,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:29:39,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1087261435, now seen corresponding path program 10 times [2021-10-06 21:29:39,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:29:39,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103472391] [2021-10-06 21:29:39,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:29:39,549 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:29:39,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:29:39,550 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) [2021-10-06 21:29:39,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-06 21:29:40,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:29:40,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:29:40,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:29:40,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:29:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:29:40,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:29:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:29:40,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:29:40,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103472391] [2021-10-06 21:29:40,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103472391] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:29:40,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:29:40,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 21:29:40,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342117707] [2021-10-06 21:29:40,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:29:40,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:29:40,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:29:40,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:29:40,525 INFO L87 Difference]: Start difference. First operand 22370 states and 117940 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:29:41,750 INFO L93 Difference]: Finished difference Result 30086 states and 152809 transitions. [2021-10-06 21:29:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:29:41,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2021-10-06 21:29:41,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:29:41,889 INFO L225 Difference]: With dead ends: 30086 [2021-10-06 21:29:41,889 INFO L226 Difference]: Without dead ends: 29256 [2021-10-06 21:29:41,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:29:41,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29256 states. [2021-10-06 21:29:42,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29256 to 22302. [2021-10-06 21:29:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22302 states, 22301 states have (on average 5.26765615891664) internal successors, (117474), 22301 states have internal predecessors, (117474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22302 states to 22302 states and 117474 transitions. [2021-10-06 21:29:43,085 INFO L78 Accepts]: Start accepts. Automaton has 22302 states and 117474 transitions. Word has length 30 [2021-10-06 21:29:43,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:29:43,086 INFO L470 AbstractCegarLoop]: Abstraction has 22302 states and 117474 transitions. [2021-10-06 21:29:43,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:43,086 INFO L276 IsEmpty]: Start isEmpty. Operand 22302 states and 117474 transitions. [2021-10-06 21:29:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:29:43,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:29:43,149 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:29:43,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-10-06 21:29:43,357 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 [2021-10-06 21:29:43,357 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:29:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:29:43,358 INFO L82 PathProgramCache]: Analyzing trace with hash -209302891, now seen corresponding path program 11 times [2021-10-06 21:29:43,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:29:43,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190304969] [2021-10-06 21:29:43,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:29:43,360 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:29:43,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:29:43,361 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) [2021-10-06 21:29:43,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-10-06 21:29:43,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:29:43,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:29:43,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:29:43,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:29:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:29:44,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:29:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:29:44,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:29:44,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190304969] [2021-10-06 21:29:44,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190304969] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:29:44,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:29:44,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-06 21:29:44,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646580792] [2021-10-06 21:29:44,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 21:29:44,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:29:44,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 21:29:44,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:29:44,516 INFO L87 Difference]: Start difference. First operand 22302 states and 117474 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:48,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:29:48,697 INFO L93 Difference]: Finished difference Result 34038 states and 170915 transitions. [2021-10-06 21:29:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-06 21:29:48,698 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-10-06 21:29:48,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:29:48,852 INFO L225 Difference]: With dead ends: 34038 [2021-10-06 21:29:48,853 INFO L226 Difference]: Without dead ends: 33676 [2021-10-06 21:29:48,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1910.4ms TimeCoverageRelationStatistics Valid=544, Invalid=1526, Unknown=0, NotChecked=0, Total=2070 [2021-10-06 21:29:49,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33676 states. [2021-10-06 21:29:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33676 to 23032. [2021-10-06 21:29:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23032 states, 23031 states have (on average 5.2995093569536715) internal successors, (122053), 23031 states have internal predecessors, (122053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23032 states to 23032 states and 122053 transitions. [2021-10-06 21:29:50,420 INFO L78 Accepts]: Start accepts. Automaton has 23032 states and 122053 transitions. Word has length 30 [2021-10-06 21:29:50,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:29:50,420 INFO L470 AbstractCegarLoop]: Abstraction has 23032 states and 122053 transitions. [2021-10-06 21:29:50,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:50,420 INFO L276 IsEmpty]: Start isEmpty. Operand 23032 states and 122053 transitions. [2021-10-06 21:29:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:29:50,529 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:29:50,530 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:29:50,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-10-06 21:29:50,744 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 [2021-10-06 21:29:50,744 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:29:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:29:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1049532975, now seen corresponding path program 12 times [2021-10-06 21:29:50,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:29:50,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127489461] [2021-10-06 21:29:50,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:29:50,747 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:29:50,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:29:50,748 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) [2021-10-06 21:29:50,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-10-06 21:29:51,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:29:51,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:29:51,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-06 21:29:51,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:29:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:29:51,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:29:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:29:51,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:29:51,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127489461] [2021-10-06 21:29:51,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127489461] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:29:51,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:29:51,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-06 21:29:51,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266711780] [2021-10-06 21:29:51,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-06 21:29:52,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:29:52,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-06 21:29:52,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-06 21:29:52,001 INFO L87 Difference]: Start difference. First operand 23032 states and 122053 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:29:57,864 INFO L93 Difference]: Finished difference Result 44866 states and 220723 transitions. [2021-10-06 21:29:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-06 21:29:57,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 30 [2021-10-06 21:29:57,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:29:58,055 INFO L225 Difference]: With dead ends: 44866 [2021-10-06 21:29:58,055 INFO L226 Difference]: Without dead ends: 44752 [2021-10-06 21:29:58,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 3446.1ms TimeCoverageRelationStatistics Valid=698, Invalid=2382, Unknown=0, NotChecked=0, Total=3080 [2021-10-06 21:29:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44752 states. [2021-10-06 21:29:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44752 to 24532. [2021-10-06 21:29:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24532 states, 24531 states have (on average 5.3965594553829845) internal successors, (132383), 24531 states have internal predecessors, (132383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24532 states to 24532 states and 132383 transitions. [2021-10-06 21:29:59,875 INFO L78 Accepts]: Start accepts. Automaton has 24532 states and 132383 transitions. Word has length 30 [2021-10-06 21:29:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:29:59,876 INFO L470 AbstractCegarLoop]: Abstraction has 24532 states and 132383 transitions. [2021-10-06 21:29:59,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:29:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 24532 states and 132383 transitions. [2021-10-06 21:29:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:29:59,950 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:29:59,950 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:29:59,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-10-06 21:30:00,151 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 [2021-10-06 21:30:00,151 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:30:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:30:00,152 INFO L82 PathProgramCache]: Analyzing trace with hash 395080259, now seen corresponding path program 13 times [2021-10-06 21:30:00,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:30:00,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067676723] [2021-10-06 21:30:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:30:00,153 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:30:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:30:00,154 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) [2021-10-06 21:30:00,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-10-06 21:30:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:30:00,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:30:00,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:30:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:30:00,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:30:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:30:01,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:30:01,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067676723] [2021-10-06 21:30:01,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067676723] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:30:01,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:30:01,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 21:30:01,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714176603] [2021-10-06 21:30:01,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:30:01,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:30:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:30:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:30:01,264 INFO L87 Difference]: Start difference. First operand 24532 states and 132383 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:04,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:30:04,658 INFO L93 Difference]: Finished difference Result 36770 states and 191162 transitions. [2021-10-06 21:30:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-06 21:30:04,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2021-10-06 21:30:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:30:04,837 INFO L225 Difference]: With dead ends: 36770 [2021-10-06 21:30:04,838 INFO L226 Difference]: Without dead ends: 36008 [2021-10-06 21:30:04,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1346.2ms TimeCoverageRelationStatistics Valid=338, Invalid=1144, Unknown=0, NotChecked=0, Total=1482 [2021-10-06 21:30:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36008 states. [2021-10-06 21:30:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36008 to 26528. [2021-10-06 21:30:05,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26528 states, 26527 states have (on average 5.390884758924869) internal successors, (143004), 26527 states have internal predecessors, (143004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26528 states to 26528 states and 143004 transitions. [2021-10-06 21:30:06,110 INFO L78 Accepts]: Start accepts. Automaton has 26528 states and 143004 transitions. Word has length 30 [2021-10-06 21:30:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:30:06,111 INFO L470 AbstractCegarLoop]: Abstraction has 26528 states and 143004 transitions. [2021-10-06 21:30:06,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:06,111 INFO L276 IsEmpty]: Start isEmpty. Operand 26528 states and 143004 transitions. [2021-10-06 21:30:06,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:30:06,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:30:06,191 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:30:06,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-10-06 21:30:06,392 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 [2021-10-06 21:30:06,392 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:30:06,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:30:06,393 INFO L82 PathProgramCache]: Analyzing trace with hash 684753463, now seen corresponding path program 14 times [2021-10-06 21:30:06,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:30:06,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205457774] [2021-10-06 21:30:06,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:30:06,394 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:30:06,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:30:06,397 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) [2021-10-06 21:30:06,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-10-06 21:30:07,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:30:07,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:30:07,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:30:07,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:30:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:30:07,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:30:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:30:07,824 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:30:07,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205457774] [2021-10-06 21:30:07,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205457774] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:30:07,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:30:07,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:30:07,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008136967] [2021-10-06 21:30:07,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:30:07,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:30:07,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:30:07,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:30:07,827 INFO L87 Difference]: Start difference. First operand 26528 states and 143004 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:09,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:30:09,990 INFO L93 Difference]: Finished difference Result 40552 states and 213733 transitions. [2021-10-06 21:30:09,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-06 21:30:09,991 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 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 30 [2021-10-06 21:30:09,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:30:10,602 INFO L225 Difference]: With dead ends: 40552 [2021-10-06 21:30:10,602 INFO L226 Difference]: Without dead ends: 39300 [2021-10-06 21:30:10,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 947.4ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-10-06 21:30:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39300 states. [2021-10-06 21:30:12,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39300 to 32144. [2021-10-06 21:30:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32144 states, 32143 states have (on average 5.603303985315621) internal successors, (180107), 32143 states have internal predecessors, (180107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32144 states to 32144 states and 180107 transitions. [2021-10-06 21:30:12,241 INFO L78 Accepts]: Start accepts. Automaton has 32144 states and 180107 transitions. Word has length 30 [2021-10-06 21:30:12,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:30:12,241 INFO L470 AbstractCegarLoop]: Abstraction has 32144 states and 180107 transitions. [2021-10-06 21:30:12,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:12,241 INFO L276 IsEmpty]: Start isEmpty. Operand 32144 states and 180107 transitions. [2021-10-06 21:30:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:30:12,339 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:30:12,339 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:30:12,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-10-06 21:30:12,539 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 [2021-10-06 21:30:12,540 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:30:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:30:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1101093807, now seen corresponding path program 15 times [2021-10-06 21:30:12,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:30:12,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309651207] [2021-10-06 21:30:12,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:30:12,542 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:30:12,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:30:12,544 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) [2021-10-06 21:30:12,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-10-06 21:30:13,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:30:13,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:30:13,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:30:13,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:30:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:30:13,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:30:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:30:14,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:30:14,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309651207] [2021-10-06 21:30:14,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309651207] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:30:14,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:30:14,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-10-06 21:30:14,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869540974] [2021-10-06 21:30:14,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-06 21:30:14,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:30:14,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-06 21:30:14,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:30:14,128 INFO L87 Difference]: Start difference. First operand 32144 states and 180107 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:30:17,144 INFO L93 Difference]: Finished difference Result 52626 states and 273066 transitions. [2021-10-06 21:30:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-06 21:30:17,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 30 [2021-10-06 21:30:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:30:17,499 INFO L225 Difference]: With dead ends: 52626 [2021-10-06 21:30:17,499 INFO L226 Difference]: Without dead ends: 50684 [2021-10-06 21:30:17,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1225.0ms TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2021-10-06 21:30:17,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50684 states. [2021-10-06 21:30:19,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50684 to 35204. [2021-10-06 21:30:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35204 states, 35203 states have (on average 5.543220748231684) internal successors, (195138), 35203 states have internal predecessors, (195138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35204 states to 35204 states and 195138 transitions. [2021-10-06 21:30:19,355 INFO L78 Accepts]: Start accepts. Automaton has 35204 states and 195138 transitions. Word has length 30 [2021-10-06 21:30:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:30:19,355 INFO L470 AbstractCegarLoop]: Abstraction has 35204 states and 195138 transitions. [2021-10-06 21:30:19,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 35204 states and 195138 transitions. [2021-10-06 21:30:19,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:30:19,895 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:30:19,895 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:30:19,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-10-06 21:30:20,098 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 [2021-10-06 21:30:20,099 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:30:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:30:20,100 INFO L82 PathProgramCache]: Analyzing trace with hash -682816291, now seen corresponding path program 16 times [2021-10-06 21:30:20,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:30:20,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961279895] [2021-10-06 21:30:20,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:30:20,101 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:30:20,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:30:20,102 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) [2021-10-06 21:30:20,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-10-06 21:30:20,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:30:20,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:30:20,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:30:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:30:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:30:20,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:30:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:30:21,196 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:30:21,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961279895] [2021-10-06 21:30:21,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961279895] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:30:21,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:30:21,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 21:30:21,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13922320] [2021-10-06 21:30:21,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:30:21,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:30:21,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:30:21,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:30:21,198 INFO L87 Difference]: Start difference. First operand 35204 states and 195138 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:30:24,358 INFO L93 Difference]: Finished difference Result 53404 states and 289101 transitions. [2021-10-06 21:30:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-06 21:30:24,358 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 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 30 [2021-10-06 21:30:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:30:24,710 INFO L225 Difference]: With dead ends: 53404 [2021-10-06 21:30:24,711 INFO L226 Difference]: Without dead ends: 52440 [2021-10-06 21:30:24,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1261.6ms TimeCoverageRelationStatistics Valid=408, Invalid=1074, Unknown=0, NotChecked=0, Total=1482 [2021-10-06 21:30:24,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52440 states. [2021-10-06 21:30:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52440 to 42186. [2021-10-06 21:30:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42186 states, 42185 states have (on average 5.599952589783098) internal successors, (236234), 42185 states have internal predecessors, (236234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42186 states to 42186 states and 236234 transitions. [2021-10-06 21:30:27,107 INFO L78 Accepts]: Start accepts. Automaton has 42186 states and 236234 transitions. Word has length 30 [2021-10-06 21:30:27,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:30:27,107 INFO L470 AbstractCegarLoop]: Abstraction has 42186 states and 236234 transitions. [2021-10-06 21:30:27,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 42186 states and 236234 transitions. [2021-10-06 21:30:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:30:27,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:30:27,241 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:30:27,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-10-06 21:30:27,442 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 [2021-10-06 21:30:27,442 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:30:27,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:30:27,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1833734075, now seen corresponding path program 17 times [2021-10-06 21:30:27,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:30:27,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157969832] [2021-10-06 21:30:27,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:30:27,445 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:30:27,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:30:27,446 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) [2021-10-06 21:30:27,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-10-06 21:30:28,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:30:28,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:30:28,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:30:28,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:30:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:30:28,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:30:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:30:28,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:30:28,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157969832] [2021-10-06 21:30:28,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157969832] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:30:28,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:30:28,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-10-06 21:30:28,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851433617] [2021-10-06 21:30:28,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-06 21:30:28,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:30:28,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-06 21:30:28,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:30:28,558 INFO L87 Difference]: Start difference. First operand 42186 states and 236234 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:32,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:30:32,308 INFO L93 Difference]: Finished difference Result 73468 states and 386645 transitions. [2021-10-06 21:30:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-06 21:30:32,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-10-06 21:30:32,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:30:32,847 INFO L225 Difference]: With dead ends: 73468 [2021-10-06 21:30:32,847 INFO L226 Difference]: Without dead ends: 72096 [2021-10-06 21:30:32,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1643.0ms TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2021-10-06 21:30:32,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72096 states. [2021-10-06 21:30:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72096 to 47364. [2021-10-06 21:30:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47364 states, 47363 states have (on average 5.602305597196124) internal successors, (265342), 47363 states have internal predecessors, (265342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47364 states to 47364 states and 265342 transitions. [2021-10-06 21:30:36,203 INFO L78 Accepts]: Start accepts. Automaton has 47364 states and 265342 transitions. Word has length 30 [2021-10-06 21:30:36,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:30:36,203 INFO L470 AbstractCegarLoop]: Abstraction has 47364 states and 265342 transitions. [2021-10-06 21:30:36,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:36,203 INFO L276 IsEmpty]: Start isEmpty. Operand 47364 states and 265342 transitions. [2021-10-06 21:30:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:30:36,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:30:36,467 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:30:36,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-10-06 21:30:36,667 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 [2021-10-06 21:30:36,668 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:30:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:30:36,669 INFO L82 PathProgramCache]: Analyzing trace with hash -858760477, now seen corresponding path program 18 times [2021-10-06 21:30:36,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:30:36,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098843958] [2021-10-06 21:30:36,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:30:36,670 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:30:36,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:30:36,671 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) [2021-10-06 21:30:36,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-10-06 21:30:37,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:30:37,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:30:37,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:30:37,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:30:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:30:37,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:30:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:30:37,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:30:37,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098843958] [2021-10-06 21:30:37,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098843958] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:30:37,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:30:37,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-06 21:30:37,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603795217] [2021-10-06 21:30:37,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:30:37,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:30:37,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:30:37,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:30:37,879 INFO L87 Difference]: Start difference. First operand 47364 states and 265342 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:30:43,582 INFO L93 Difference]: Finished difference Result 107728 states and 553270 transitions. [2021-10-06 21:30:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-06 21:30:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 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 30 [2021-10-06 21:30:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:30:44,376 INFO L225 Difference]: With dead ends: 107728 [2021-10-06 21:30:44,376 INFO L226 Difference]: Without dead ends: 106896 [2021-10-06 21:30:44,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2619.1ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-10-06 21:30:44,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106896 states. [2021-10-06 21:30:48,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106896 to 50478. [2021-10-06 21:30:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50478 states, 50477 states have (on average 5.643758543495057) internal successors, (284880), 50477 states have internal predecessors, (284880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50478 states to 50478 states and 284880 transitions. [2021-10-06 21:30:49,329 INFO L78 Accepts]: Start accepts. Automaton has 50478 states and 284880 transitions. Word has length 30 [2021-10-06 21:30:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:30:49,329 INFO L470 AbstractCegarLoop]: Abstraction has 50478 states and 284880 transitions. [2021-10-06 21:30:49,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 50478 states and 284880 transitions. [2021-10-06 21:30:50,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:30:50,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:30:50,073 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:30:50,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2021-10-06 21:30:50,288 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 [2021-10-06 21:30:50,289 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:30:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:30:50,290 INFO L82 PathProgramCache]: Analyzing trace with hash 973228009, now seen corresponding path program 19 times [2021-10-06 21:30:50,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:30:50,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259050383] [2021-10-06 21:30:50,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:30:50,292 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:30:50,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:30:50,293 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) [2021-10-06 21:30:50,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-10-06 21:30:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:30:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:30:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:30:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:30:51,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:30:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:30:51,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:30:51,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259050383] [2021-10-06 21:30:51,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259050383] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:30:51,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:30:51,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:30:51,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114096683] [2021-10-06 21:30:51,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:30:51,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:30:51,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:30:51,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:30:51,270 INFO L87 Difference]: Start difference. First operand 50478 states and 284880 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-10-06 21:30:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:30:53,479 INFO L93 Difference]: Finished difference Result 75636 states and 409287 transitions. [2021-10-06 21:30:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-06 21:30:53,480 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 30 [2021-10-06 21:30:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:30:54,006 INFO L225 Difference]: With dead ends: 75636 [2021-10-06 21:30:54,007 INFO L226 Difference]: Without dead ends: 74936 [2021-10-06 21:30:54,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 572.6ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-10-06 21:30:54,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74936 states. [2021-10-06 21:30:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74936 to 54004. [2021-10-06 21:30:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54004 states, 54003 states have (on average 5.657722719108198) internal successors, (305534), 54003 states have internal predecessors, (305534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:30:57,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54004 states to 54004 states and 305534 transitions. [2021-10-06 21:30:57,457 INFO L78 Accepts]: Start accepts. Automaton has 54004 states and 305534 transitions. Word has length 30 [2021-10-06 21:30:57,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:30:57,457 INFO L470 AbstractCegarLoop]: Abstraction has 54004 states and 305534 transitions. [2021-10-06 21:30:57,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-10-06 21:30:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 54004 states and 305534 transitions. [2021-10-06 21:30:57,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:30:57,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:30:57,642 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:30:57,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-10-06 21:30:57,855 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 [2021-10-06 21:30:57,855 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:30:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:30:57,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1322484295, now seen corresponding path program 20 times [2021-10-06 21:30:57,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:30:57,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25083606] [2021-10-06 21:30:57,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:30:57,857 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:30:57,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:30:57,858 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) [2021-10-06 21:30:57,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-10-06 21:30:59,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:30:59,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:30:59,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:30:59,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:30:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:30:59,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:30:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:30:59,461 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:30:59,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25083606] [2021-10-06 21:30:59,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25083606] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:30:59,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:30:59,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:30:59,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082117853] [2021-10-06 21:30:59,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:30:59,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:30:59,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:30:59,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:30:59,465 INFO L87 Difference]: Start difference. First operand 54004 states and 305534 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-10-06 21:31:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:31:02,223 INFO L93 Difference]: Finished difference Result 80568 states and 446142 transitions. [2021-10-06 21:31:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-06 21:31:02,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 30 [2021-10-06 21:31:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:31:02,817 INFO L225 Difference]: With dead ends: 80568 [2021-10-06 21:31:02,818 INFO L226 Difference]: Without dead ends: 80184 [2021-10-06 21:31:02,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 812.7ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-10-06 21:31:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80184 states. [2021-10-06 21:31:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80184 to 67618. [2021-10-06 21:31:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67618 states, 67617 states have (on average 5.772069154206783) internal successors, (390290), 67617 states have internal predecessors, (390290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:31:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67618 states to 67618 states and 390290 transitions. [2021-10-06 21:31:06,844 INFO L78 Accepts]: Start accepts. Automaton has 67618 states and 390290 transitions. Word has length 30 [2021-10-06 21:31:06,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:31:06,845 INFO L470 AbstractCegarLoop]: Abstraction has 67618 states and 390290 transitions. [2021-10-06 21:31:06,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-10-06 21:31:06,845 INFO L276 IsEmpty]: Start isEmpty. Operand 67618 states and 390290 transitions. [2021-10-06 21:31:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:31:07,710 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:31:07,710 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:31:07,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-10-06 21:31:07,924 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 [2021-10-06 21:31:07,925 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:31:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:31:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1888048199, now seen corresponding path program 21 times [2021-10-06 21:31:07,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:31:07,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600126693] [2021-10-06 21:31:07,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:31:07,927 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:31:07,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:31:07,929 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) [2021-10-06 21:31:07,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-10-06 21:31:08,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-06 21:31:08,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:31:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:31:08,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:31:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:31:08,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:31:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:31:09,220 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:31:09,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600126693] [2021-10-06 21:31:09,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600126693] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:31:09,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:31:09,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-10-06 21:31:09,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49574250] [2021-10-06 21:31:09,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-06 21:31:09,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:31:09,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-06 21:31:09,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-06 21:31:09,222 INFO L87 Difference]: Start difference. First operand 67618 states and 390290 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:31:14,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:31:14,401 INFO L93 Difference]: Finished difference Result 109798 states and 590976 transitions. [2021-10-06 21:31:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-06 21:31:14,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 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 30 [2021-10-06 21:31:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:31:15,322 INFO L225 Difference]: With dead ends: 109798 [2021-10-06 21:31:15,322 INFO L226 Difference]: Without dead ends: 109578 [2021-10-06 21:31:15,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2020.2ms TimeCoverageRelationStatistics Valid=230, Invalid=826, Unknown=0, NotChecked=0, Total=1056 [2021-10-06 21:31:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109578 states. [2021-10-06 21:31:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109578 to 75914. [2021-10-06 21:31:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75914 states, 75913 states have (on average 5.835983296668555) internal successors, (443027), 75913 states have internal predecessors, (443027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:31:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75914 states to 75914 states and 443027 transitions. [2021-10-06 21:31:21,342 INFO L78 Accepts]: Start accepts. Automaton has 75914 states and 443027 transitions. Word has length 30 [2021-10-06 21:31:21,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:31:21,342 INFO L470 AbstractCegarLoop]: Abstraction has 75914 states and 443027 transitions. [2021-10-06 21:31:21,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:31:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 75914 states and 443027 transitions. [2021-10-06 21:31:21,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:31:21,703 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:31:21,704 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:31:21,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2021-10-06 21:31:21,918 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 [2021-10-06 21:31:21,919 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:31:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:31:21,920 INFO L82 PathProgramCache]: Analyzing trace with hash -574930611, now seen corresponding path program 22 times [2021-10-06 21:31:21,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:31:21,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372869715] [2021-10-06 21:31:21,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:31:21,921 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:31:21,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:31:21,923 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) [2021-10-06 21:31:21,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-10-06 21:31:22,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:31:22,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:31:22,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:31:22,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:31:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:31:22,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:31:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:31:22,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:31:22,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372869715] [2021-10-06 21:31:22,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372869715] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:31:22,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:31:22,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:31:22,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692874406] [2021-10-06 21:31:22,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:31:22,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:31:22,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:31:22,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:31:22,944 INFO L87 Difference]: Start difference. First operand 75914 states and 443027 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-10-06 21:31:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:31:25,387 INFO L93 Difference]: Finished difference Result 89372 states and 503565 transitions. [2021-10-06 21:31:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-06 21:31:25,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 30 [2021-10-06 21:31:25,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:31:26,536 INFO L225 Difference]: With dead ends: 89372 [2021-10-06 21:31:26,536 INFO L226 Difference]: Without dead ends: 88346 [2021-10-06 21:31:26,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 597.5ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-10-06 21:31:26,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88346 states. [2021-10-06 21:31:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88346 to 78498. [2021-10-06 21:31:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78498 states, 78497 states have (on average 5.812285819840248) internal successors, (456247), 78497 states have internal predecessors, (456247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:31:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78498 states to 78498 states and 456247 transitions. [2021-10-06 21:31:31,254 INFO L78 Accepts]: Start accepts. Automaton has 78498 states and 456247 transitions. Word has length 30 [2021-10-06 21:31:31,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:31:31,254 INFO L470 AbstractCegarLoop]: Abstraction has 78498 states and 456247 transitions. [2021-10-06 21:31:31,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-10-06 21:31:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 78498 states and 456247 transitions. [2021-10-06 21:31:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:31:32,266 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:31:32,266 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:31:32,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-10-06 21:31:32,482 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 [2021-10-06 21:31:32,482 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:31:32,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:31:32,483 INFO L82 PathProgramCache]: Analyzing trace with hash -225674325, now seen corresponding path program 23 times [2021-10-06 21:31:32,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:31:32,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140997081] [2021-10-06 21:31:32,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:31:32,484 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:31:32,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:31:32,486 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) [2021-10-06 21:31:32,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-10-06 21:31:33,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:31:33,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:31:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:31:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:31:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:31:33,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:31:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:31:33,747 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:31:33,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140997081] [2021-10-06 21:31:33,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140997081] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:31:33,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:31:33,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-06 21:31:33,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037210340] [2021-10-06 21:31:33,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:31:33,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:31:33,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:31:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:31:33,750 INFO L87 Difference]: Start difference. First operand 78498 states and 456247 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:31:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:31:39,870 INFO L93 Difference]: Finished difference Result 160698 states and 882881 transitions. [2021-10-06 21:31:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-06 21:31:39,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-10-06 21:31:39,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:31:43,022 INFO L225 Difference]: With dead ends: 160698 [2021-10-06 21:31:43,022 INFO L226 Difference]: Without dead ends: 160546 [2021-10-06 21:31:43,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1773.1ms TimeCoverageRelationStatistics Valid=364, Invalid=1196, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 21:31:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160546 states. [2021-10-06 21:31:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160546 to 86642. [2021-10-06 21:31:50,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86642 states, 86641 states have (on average 5.905979847878025) internal successors, (511700), 86641 states have internal predecessors, (511700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:31:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86642 states to 86642 states and 511700 transitions. [2021-10-06 21:31:52,111 INFO L78 Accepts]: Start accepts. Automaton has 86642 states and 511700 transitions. Word has length 30 [2021-10-06 21:31:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:31:52,114 INFO L470 AbstractCegarLoop]: Abstraction has 86642 states and 511700 transitions. [2021-10-06 21:31:52,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:31:52,114 INFO L276 IsEmpty]: Start isEmpty. Operand 86642 states and 511700 transitions. [2021-10-06 21:31:52,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:31:52,517 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:31:52,517 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:31:52,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2021-10-06 21:31:52,718 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 [2021-10-06 21:31:52,718 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:31:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:31:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash 928172163, now seen corresponding path program 24 times [2021-10-06 21:31:52,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:31:52,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058448390] [2021-10-06 21:31:52,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:31:52,722 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:31:52,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:31:52,723 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) [2021-10-06 21:31:52,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-10-06 21:31:53,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:31:53,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:31:53,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:31:53,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:31:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:31:53,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:31:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:31:53,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:31:53,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058448390] [2021-10-06 21:31:53,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058448390] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:31:53,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:31:53,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-06 21:31:53,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211046615] [2021-10-06 21:31:53,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:31:53,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:31:53,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:31:53,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:31:53,972 INFO L87 Difference]: Start difference. First operand 86642 states and 511700 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:31:59,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:31:59,583 INFO L93 Difference]: Finished difference Result 108776 states and 616689 transitions. [2021-10-06 21:31:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-06 21:31:59,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-10-06 21:31:59,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:32:00,932 INFO L225 Difference]: With dead ends: 108776 [2021-10-06 21:32:00,932 INFO L226 Difference]: Without dead ends: 108480 [2021-10-06 21:32:00,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1982.7ms TimeCoverageRelationStatistics Valid=421, Invalid=1741, Unknown=0, NotChecked=0, Total=2162 [2021-10-06 21:32:01,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108480 states. [2021-10-06 21:32:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108480 to 87148. [2021-10-06 21:32:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87148 states, 87147 states have (on average 5.89778190872893) internal successors, (513974), 87147 states have internal predecessors, (513974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:32:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87148 states to 87148 states and 513974 transitions. [2021-10-06 21:32:06,526 INFO L78 Accepts]: Start accepts. Automaton has 87148 states and 513974 transitions. Word has length 30 [2021-10-06 21:32:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:32:06,527 INFO L470 AbstractCegarLoop]: Abstraction has 87148 states and 513974 transitions. [2021-10-06 21:32:06,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:32:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 87148 states and 513974 transitions. [2021-10-06 21:32:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:32:06,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:32:06,924 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:32:06,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2021-10-06 21:32:07,124 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 [2021-10-06 21:32:07,125 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:32:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:32:07,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2139268077, now seen corresponding path program 25 times [2021-10-06 21:32:07,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:32:07,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451119605] [2021-10-06 21:32:07,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:32:07,129 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:32:07,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:32:07,130 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) [2021-10-06 21:32:07,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-10-06 21:32:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:32:07,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:32:07,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:32:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:32:07,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:32:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:32:08,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:32:08,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451119605] [2021-10-06 21:32:08,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451119605] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:32:08,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:32:08,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:32:08,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980743728] [2021-10-06 21:32:08,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:32:08,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:32:08,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:32:08,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:32:08,144 INFO L87 Difference]: Start difference. First operand 87148 states and 513974 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:32:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:32:10,522 INFO L93 Difference]: Finished difference Result 96326 states and 561528 transitions. [2021-10-06 21:32:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-06 21:32:10,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 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 30 [2021-10-06 21:32:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:32:11,380 INFO L225 Difference]: With dead ends: 96326 [2021-10-06 21:32:11,381 INFO L226 Difference]: Without dead ends: 96152 [2021-10-06 21:32:11,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-06 21:32:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96152 states. [2021-10-06 21:32:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96152 to 87160. [2021-10-06 21:32:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87160 states, 87159 states have (on average 5.896488027627669) internal successors, (513932), 87159 states have internal predecessors, (513932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:32:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87160 states to 87160 states and 513932 transitions. [2021-10-06 21:32:16,600 INFO L78 Accepts]: Start accepts. Automaton has 87160 states and 513932 transitions. Word has length 30 [2021-10-06 21:32:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:32:16,600 INFO L470 AbstractCegarLoop]: Abstraction has 87160 states and 513932 transitions. [2021-10-06 21:32:16,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:32:16,601 INFO L276 IsEmpty]: Start isEmpty. Operand 87160 states and 513932 transitions. [2021-10-06 21:32:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:32:16,965 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:32:16,965 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:32:16,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-10-06 21:32:17,166 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 [2021-10-06 21:32:17,166 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:32:17,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:32:17,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1858906507, now seen corresponding path program 26 times [2021-10-06 21:32:17,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:32:17,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398044905] [2021-10-06 21:32:17,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:32:17,168 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:32:17,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:32:17,169 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) [2021-10-06 21:32:17,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2021-10-06 21:32:18,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:32:18,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:32:18,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:32:18,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:32:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:32:18,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:32:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:32:18,902 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:32:18,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398044905] [2021-10-06 21:32:18,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398044905] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:32:18,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:32:18,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-06 21:32:18,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788944572] [2021-10-06 21:32:18,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:32:18,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:32:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:32:18,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:32:18,904 INFO L87 Difference]: Start difference. First operand 87160 states and 513932 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:32:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:32:23,681 INFO L93 Difference]: Finished difference Result 138402 states and 753152 transitions. [2021-10-06 21:32:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-06 21:32:23,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-10-06 21:32:23,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:32:24,845 INFO L225 Difference]: With dead ends: 138402 [2021-10-06 21:32:24,845 INFO L226 Difference]: Without dead ends: 137926 [2021-10-06 21:32:24,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1922.2ms TimeCoverageRelationStatistics Valid=387, Invalid=1173, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 21:32:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137926 states. [2021-10-06 21:32:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137926 to 90190. [2021-10-06 21:32:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90190 states, 90189 states have (on average 5.901063322578142) internal successors, (532211), 90189 states have internal predecessors, (532211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:32:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90190 states to 90190 states and 532211 transitions. [2021-10-06 21:32:32,319 INFO L78 Accepts]: Start accepts. Automaton has 90190 states and 532211 transitions. Word has length 30 [2021-10-06 21:32:32,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:32:32,320 INFO L470 AbstractCegarLoop]: Abstraction has 90190 states and 532211 transitions. [2021-10-06 21:32:32,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:32:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 90190 states and 532211 transitions. [2021-10-06 21:32:33,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:32:33,334 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:32:33,334 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:32:33,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2021-10-06 21:32:33,547 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 [2021-10-06 21:32:33,547 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:32:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:32:33,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1663873199, now seen corresponding path program 27 times [2021-10-06 21:32:33,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:32:33,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318098683] [2021-10-06 21:32:33,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-06 21:32:33,549 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:32:33,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:32:33,550 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) [2021-10-06 21:32:33,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-10-06 21:32:34,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-06 21:32:34,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:32:34,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:32:34,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:32:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:32:34,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:32:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-06 21:32:35,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:32:35,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318098683] [2021-10-06 21:32:35,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318098683] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:32:35,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:32:35,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-06 21:32:35,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288614184] [2021-10-06 21:32:35,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:32:35,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:32:35,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:32:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:32:35,214 INFO L87 Difference]: Start difference. First operand 90190 states and 532211 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:32:40,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:32:40,662 INFO L93 Difference]: Finished difference Result 122972 states and 686923 transitions. [2021-10-06 21:32:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-06 21:32:40,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-10-06 21:32:40,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:32:41,695 INFO L225 Difference]: With dead ends: 122972 [2021-10-06 21:32:41,695 INFO L226 Difference]: Without dead ends: 122578 [2021-10-06 21:32:41,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1688.6ms TimeCoverageRelationStatistics Valid=399, Invalid=1241, Unknown=0, NotChecked=0, Total=1640 [2021-10-06 21:32:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122578 states. [2021-10-06 21:32:46,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122578 to 89700. [2021-10-06 21:32:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89700 states, 89699 states have (on average 5.89601890768013) internal successors, (528867), 89699 states have internal predecessors, (528867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:32:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89700 states to 89700 states and 528867 transitions. [2021-10-06 21:32:48,136 INFO L78 Accepts]: Start accepts. Automaton has 89700 states and 528867 transitions. Word has length 30 [2021-10-06 21:32:48,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:32:48,136 INFO L470 AbstractCegarLoop]: Abstraction has 89700 states and 528867 transitions. [2021-10-06 21:32:48,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:32:48,136 INFO L276 IsEmpty]: Start isEmpty. Operand 89700 states and 528867 transitions. [2021-10-06 21:32:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:32:49,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:32:49,230 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:32:49,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-10-06 21:32:49,444 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 [2021-10-06 21:32:49,444 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:32:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:32:49,445 INFO L82 PathProgramCache]: Analyzing trace with hash -264523119, now seen corresponding path program 28 times [2021-10-06 21:32:49,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:32:49,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481393970] [2021-10-06 21:32:49,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-06 21:32:49,447 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:32:49,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:32:49,448 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) [2021-10-06 21:32:49,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-10-06 21:32:50,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-06 21:32:50,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:32:50,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:32:50,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:32:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:32:50,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:32:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:32:50,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:32:50,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481393970] [2021-10-06 21:32:50,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481393970] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:32:50,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:32:50,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 21:32:50,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619779541] [2021-10-06 21:32:50,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:32:50,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:32:50,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:32:50,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:32:50,611 INFO L87 Difference]: Start difference. First operand 89700 states and 528867 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:32:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:32:53,511 INFO L93 Difference]: Finished difference Result 107660 states and 625299 transitions. [2021-10-06 21:32:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:32:53,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 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 30 [2021-10-06 21:32:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:32:54,460 INFO L225 Difference]: With dead ends: 107660 [2021-10-06 21:32:54,460 INFO L226 Difference]: Without dead ends: 107612 [2021-10-06 21:32:54,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-10-06 21:32:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107612 states. [2021-10-06 21:32:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107612 to 89934. [2021-10-06 21:32:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89934 states, 89933 states have (on average 5.892898046323374) internal successors, (529966), 89933 states have internal predecessors, (529966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:33:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89934 states to 89934 states and 529966 transitions. [2021-10-06 21:33:00,120 INFO L78 Accepts]: Start accepts. Automaton has 89934 states and 529966 transitions. Word has length 30 [2021-10-06 21:33:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:33:00,121 INFO L470 AbstractCegarLoop]: Abstraction has 89934 states and 529966 transitions. [2021-10-06 21:33:00,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:33:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 89934 states and 529966 transitions. [2021-10-06 21:33:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:33:00,494 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:33:00,494 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:33:00,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-10-06 21:33:00,699 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 [2021-10-06 21:33:00,700 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:33:00,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:33:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2077683985, now seen corresponding path program 29 times [2021-10-06 21:33:00,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:33:00,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142976385] [2021-10-06 21:33:00,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-06 21:33:00,702 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:33:00,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:33:00,703 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) [2021-10-06 21:33:00,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2021-10-06 21:33:02,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-06 21:33:02,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:33:02,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-06 21:33:02,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:33:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:33:02,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:33:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:33:02,512 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:33:02,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142976385] [2021-10-06 21:33:02,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142976385] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:33:02,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:33:02,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-06 21:33:02,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86113964] [2021-10-06 21:33:02,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:33:02,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:33:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:33:02,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:33:02,514 INFO L87 Difference]: Start difference. First operand 89934 states and 529966 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:33:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:33:08,788 INFO L93 Difference]: Finished difference Result 193428 states and 1065873 transitions. [2021-10-06 21:33:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-06 21:33:08,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-10-06 21:33:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:33:10,598 INFO L225 Difference]: With dead ends: 193428 [2021-10-06 21:33:10,598 INFO L226 Difference]: Without dead ends: 193308 [2021-10-06 21:33:10,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1566.6ms TimeCoverageRelationStatistics Valid=387, Invalid=1173, Unknown=0, NotChecked=0, Total=1560 [2021-10-06 21:33:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193308 states. [2021-10-06 21:33:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193308 to 91998. [2021-10-06 21:33:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91998 states, 91997 states have (on average 5.9163777079687385) internal successors, (544289), 91997 states have internal predecessors, (544289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:33:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91998 states to 91998 states and 544289 transitions. [2021-10-06 21:33:19,916 INFO L78 Accepts]: Start accepts. Automaton has 91998 states and 544289 transitions. Word has length 30 [2021-10-06 21:33:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:33:19,917 INFO L470 AbstractCegarLoop]: Abstraction has 91998 states and 544289 transitions. [2021-10-06 21:33:19,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:33:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 91998 states and 544289 transitions. [2021-10-06 21:33:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:33:20,951 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:33:20,951 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:33:20,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2021-10-06 21:33:21,152 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 [2021-10-06 21:33:21,152 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:33:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:33:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1063436823, now seen corresponding path program 30 times [2021-10-06 21:33:21,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:33:21,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139904352] [2021-10-06 21:33:21,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-06 21:33:21,154 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:33:21,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:33:21,156 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) [2021-10-06 21:33:21,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2021-10-06 21:33:22,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-06 21:33:22,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:33:22,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-06 21:33:22,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:33:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:33:22,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:33:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:33:22,443 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:33:22,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139904352] [2021-10-06 21:33:22,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139904352] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:33:22,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:33:22,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-06 21:33:22,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946531115] [2021-10-06 21:33:22,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-06 21:33:22,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:33:22,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-06 21:33:22,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-06 21:33:22,445 INFO L87 Difference]: Start difference. First operand 91998 states and 544289 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:33:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:33:27,747 INFO L93 Difference]: Finished difference Result 121942 states and 688328 transitions. [2021-10-06 21:33:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-06 21:33:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-10-06 21:33:27,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:33:28,819 INFO L225 Difference]: With dead ends: 121942 [2021-10-06 21:33:28,819 INFO L226 Difference]: Without dead ends: 121678 [2021-10-06 21:33:28,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1410.0ms TimeCoverageRelationStatistics Valid=366, Invalid=1440, Unknown=0, NotChecked=0, Total=1806 [2021-10-06 21:33:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121678 states. [2021-10-06 21:33:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121678 to 92176. [2021-10-06 21:33:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92176 states, 92175 states have (on average 5.917526444263629) internal successors, (545448), 92175 states have internal predecessors, (545448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:33:35,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92176 states to 92176 states and 545448 transitions. [2021-10-06 21:33:35,909 INFO L78 Accepts]: Start accepts. Automaton has 92176 states and 545448 transitions. Word has length 30 [2021-10-06 21:33:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:33:35,909 INFO L470 AbstractCegarLoop]: Abstraction has 92176 states and 545448 transitions. [2021-10-06 21:33:35,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:33:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 92176 states and 545448 transitions. [2021-10-06 21:33:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:33:36,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:33:36,489 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:33:36,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2021-10-06 21:33:36,706 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 [2021-10-06 21:33:36,706 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:33:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:33:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1358287747, now seen corresponding path program 1 times [2021-10-06 21:33:36,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:33:36,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618330952] [2021-10-06 21:33:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-06 21:33:36,707 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:33:36,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:33:36,708 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) [2021-10-06 21:33:36,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-10-06 21:33:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:33:38,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:33:38,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:33:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:33:38,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:33:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:33:38,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:33:38,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618330952] [2021-10-06 21:33:38,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618330952] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:33:38,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:33:38,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 21:33:38,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584605018] [2021-10-06 21:33:38,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:33:38,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:33:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:33:38,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:33:38,888 INFO L87 Difference]: Start difference. First operand 92176 states and 545448 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:33:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:33:48,750 INFO L93 Difference]: Finished difference Result 198710 states and 1140358 transitions. [2021-10-06 21:33:48,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-06 21:33:48,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 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 30 [2021-10-06 21:33:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:33:51,426 INFO L225 Difference]: With dead ends: 198710 [2021-10-06 21:33:51,426 INFO L226 Difference]: Without dead ends: 197990 [2021-10-06 21:33:51,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 4609.5ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-10-06 21:33:51,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197990 states. [2021-10-06 21:34:00,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197990 to 133080. [2021-10-06 21:34:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133080 states, 133079 states have (on average 6.092418788839712) internal successors, (810773), 133079 states have internal predecessors, (810773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:34:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133080 states to 133080 states and 810773 transitions. [2021-10-06 21:34:03,188 INFO L78 Accepts]: Start accepts. Automaton has 133080 states and 810773 transitions. Word has length 30 [2021-10-06 21:34:03,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:34:03,188 INFO L470 AbstractCegarLoop]: Abstraction has 133080 states and 810773 transitions. [2021-10-06 21:34:03,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:34:03,188 INFO L276 IsEmpty]: Start isEmpty. Operand 133080 states and 810773 transitions. [2021-10-06 21:34:04,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:34:04,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:34:04,539 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:34:04,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-10-06 21:34:04,754 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 [2021-10-06 21:34:04,755 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:34:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:34:04,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1771758633, now seen corresponding path program 2 times [2021-10-06 21:34:04,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:34:04,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136145110] [2021-10-06 21:34:04,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-06 21:34:04,757 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:34:04,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:34:04,758 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) [2021-10-06 21:34:04,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2021-10-06 21:34:05,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-06 21:34:05,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-06 21:34:05,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-06 21:34:05,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:34:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:34:05,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:34:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-06 21:34:06,226 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:34:06,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136145110] [2021-10-06 21:34:06,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136145110] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:34:06,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:34:06,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-06 21:34:06,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159442737] [2021-10-06 21:34:06,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-06 21:34:06,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:34:06,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-06 21:34:06,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-06 21:34:06,228 INFO L87 Difference]: Start difference. First operand 133080 states and 810773 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:34:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:34:22,960 INFO L93 Difference]: Finished difference Result 404714 states and 2421749 transitions. [2021-10-06 21:34:22,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-10-06 21:34:22,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 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 30 [2021-10-06 21:34:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:34:32,098 INFO L225 Difference]: With dead ends: 404714 [2021-10-06 21:34:32,098 INFO L226 Difference]: Without dead ends: 404120 [2021-10-06 21:34:32,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 5717.2ms TimeCoverageRelationStatistics Valid=1149, Invalid=4253, Unknown=0, NotChecked=0, Total=5402 [2021-10-06 21:34:32,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404120 states. [2021-10-06 21:35:03,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404120 to 240908. [2021-10-06 21:35:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240908 states, 240907 states have (on average 6.548634950416551) internal successors, (1577612), 240907 states have internal predecessors, (1577612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:35:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240908 states to 240908 states and 1577612 transitions. [2021-10-06 21:35:08,331 INFO L78 Accepts]: Start accepts. Automaton has 240908 states and 1577612 transitions. Word has length 30 [2021-10-06 21:35:08,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:35:08,332 INFO L470 AbstractCegarLoop]: Abstraction has 240908 states and 1577612 transitions. [2021-10-06 21:35:08,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:35:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 240908 states and 1577612 transitions. [2021-10-06 21:35:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-06 21:35:10,541 INFO L504 BasicCegarLoop]: Found error trace [2021-10-06 21:35:10,541 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-06 21:35:10,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2021-10-06 21:35:10,755 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 [2021-10-06 21:35:10,756 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 18 more)] === [2021-10-06 21:35:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-06 21:35:10,756 INFO L82 PathProgramCache]: Analyzing trace with hash -825673355, now seen corresponding path program 31 times [2021-10-06 21:35:10,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-06 21:35:10,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513826184] [2021-10-06 21:35:10,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-06 21:35:10,758 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-06 21:35:10,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-06 21:35:10,759 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) [2021-10-06 21:35:10,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2021-10-06 21:35:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-06 21:35:11,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-06 21:35:11,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-06 21:35:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:35:11,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-06 21:35:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-06 21:35:11,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-06 21:35:11,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513826184] [2021-10-06 21:35:11,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513826184] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-06 21:35:11,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-06 21:35:11,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-06 21:35:11,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665769896] [2021-10-06 21:35:11,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-06 21:35:11,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-06 21:35:11,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-06 21:35:11,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-06 21:35:11,994 INFO L87 Difference]: Start difference. First operand 240908 states and 1577612 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:35:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-06 21:35:23,409 INFO L93 Difference]: Finished difference Result 365076 states and 2358918 transitions. [2021-10-06 21:35:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-06 21:35:23,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 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 30 [2021-10-06 21:35:23,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-06 21:35:32,446 INFO L225 Difference]: With dead ends: 365076 [2021-10-06 21:35:32,447 INFO L226 Difference]: Without dead ends: 362688 [2021-10-06 21:35:32,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 456.6ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-10-06 21:35:34,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362688 states. [2021-10-06 21:35:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362688 to 315200. [2021-10-06 21:35:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315200 states, 315199 states have (on average 6.66325083518666) internal successors, (2100250), 315199 states have internal predecessors, (2100250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315200 states to 315200 states and 2100250 transitions. [2021-10-06 21:36:06,546 INFO L78 Accepts]: Start accepts. Automaton has 315200 states and 2100250 transitions. Word has length 30 [2021-10-06 21:36:06,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-06 21:36:06,546 INFO L470 AbstractCegarLoop]: Abstraction has 315200 states and 2100250 transitions. [2021-10-06 21:36:06,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-06 21:36:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 315200 states and 2100250 transitions.