/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 10:57:00,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 10:57:00,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 10:57:00,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 10:57:00,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 10:57:00,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 10:57:00,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 10:57:00,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 10:57:00,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 10:57:00,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 10:57:00,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 10:57:00,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 10:57:00,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 10:57:00,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 10:57:00,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 10:57:00,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 10:57:00,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 10:57:00,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 10:57:00,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 10:57:00,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 10:57:00,828 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 10:57:00,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 10:57:00,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 10:57:00,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 10:57:00,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 10:57:00,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 10:57:00,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 10:57:00,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 10:57:00,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 10:57:00,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 10:57:00,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 10:57:00,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 10:57:00,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 10:57:00,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 10:57:00,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 10:57:00,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 10:57:00,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 10:57:00,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 10:57:00,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 10:57:00,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 10:57:00,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 10:57:00,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 10:57:00,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 10:57:00,878 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 10:57:00,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 10:57:00,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 10:57:00,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 10:57:00,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 10:57:00,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 10:57:00,881 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 10:57:00,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 10:57:00,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 10:57:00,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 10:57:00,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 10:57:00,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 10:57:00,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 10:57:00,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 10:57:00,882 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 10:57:00,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 10:57:00,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 10:57:00,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 10:57:00,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 10:57:00,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:57:00,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 10:57:00,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 10:57:00,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 10:57:00,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 10:57:00,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 10:57:00,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 10:57:00,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 10:57:00,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 10:57:00,885 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 10:57:00,885 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 10:57:01,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 10:57:01,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 10:57:01,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 10:57:01,077 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 10:57:01,077 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 10:57:01,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2022-04-06 10:57:01,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caea85d6f/8c6bf5d8465e43df8b837bb2845f48bd/FLAG479915bcd [2022-04-06 10:57:01,435 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 10:57:01,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2022-04-06 10:57:01,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caea85d6f/8c6bf5d8465e43df8b837bb2845f48bd/FLAG479915bcd [2022-04-06 10:57:01,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caea85d6f/8c6bf5d8465e43df8b837bb2845f48bd [2022-04-06 10:57:01,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 10:57:01,450 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 10:57:01,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 10:57:01,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 10:57:01,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 10:57:01,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:57:01" (1/1) ... [2022-04-06 10:57:01,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1453c273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:01, skipping insertion in model container [2022-04-06 10:57:01,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:57:01" (1/1) ... [2022-04-06 10:57:01,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 10:57:01,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 10:57:01,588 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound2.c[597,610] [2022-04-06 10:57:01,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:57:01,623 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 10:57:01,632 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound2.c[597,610] [2022-04-06 10:57:01,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:57:01,647 INFO L208 MainTranslator]: Completed translation [2022-04-06 10:57:01,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:01 WrapperNode [2022-04-06 10:57:01,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 10:57:01,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 10:57:01,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 10:57:01,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 10:57:01,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:01" (1/1) ... [2022-04-06 10:57:01,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:01" (1/1) ... [2022-04-06 10:57:01,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:01" (1/1) ... [2022-04-06 10:57:01,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:01" (1/1) ... [2022-04-06 10:57:01,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:01" (1/1) ... [2022-04-06 10:57:01,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:01" (1/1) ... [2022-04-06 10:57:01,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:01" (1/1) ... [2022-04-06 10:57:01,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 10:57:01,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 10:57:01,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 10:57:01,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 10:57:01,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:01" (1/1) ... [2022-04-06 10:57:01,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:57:01,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:57:01,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 10:57:01,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 10:57:01,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 10:57:01,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 10:57:01,741 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 10:57:01,741 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 10:57:01,742 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 10:57:01,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 10:57:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 10:57:01,742 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 10:57:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 10:57:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 10:57:01,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 10:57:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 10:57:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 10:57:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 10:57:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 10:57:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 10:57:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 10:57:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 10:57:01,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 10:57:01,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 10:57:01,790 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 10:57:01,791 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 10:57:01,908 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 10:57:01,912 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 10:57:01,912 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 10:57:01,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:57:01 BoogieIcfgContainer [2022-04-06 10:57:01,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 10:57:01,914 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 10:57:01,914 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 10:57:01,919 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 10:57:01,921 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:57:01" (1/1) ... [2022-04-06 10:57:01,923 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 10:57:01,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:57:01 BasicIcfg [2022-04-06 10:57:01,950 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 10:57:01,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 10:57:01,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 10:57:01,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 10:57:01,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:57:01" (1/4) ... [2022-04-06 10:57:01,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f16610a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:57:01, skipping insertion in model container [2022-04-06 10:57:01,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:57:01" (2/4) ... [2022-04-06 10:57:01,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f16610a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:57:01, skipping insertion in model container [2022-04-06 10:57:01,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:57:01" (3/4) ... [2022-04-06 10:57:01,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f16610a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:57:01, skipping insertion in model container [2022-04-06 10:57:01,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:57:01" (4/4) ... [2022-04-06 10:57:01,965 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound2.cqvasr [2022-04-06 10:57:01,977 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 10:57:01,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 10:57:02,012 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 10:57:02,018 INFO L340 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-04-06 10:57:02,018 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 10:57:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 10:57:02,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 10:57:02,038 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:57:02,039 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:57:02,040 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:57:02,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:57:02,045 INFO L85 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2022-04-06 10:57:02,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:57:02,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327568808] [2022-04-06 10:57:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:02,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:57:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:57:02,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:57:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:57:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:57:02,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:57:02,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327568808] [2022-04-06 10:57:02,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327568808] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:57:02,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:57:02,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 10:57:02,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282064425] [2022-04-06 10:57:02,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:57:02,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 10:57:02,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:57:02,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 10:57:02,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 10:57:02,233 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:57:02,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:57:02,288 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-04-06 10:57:02,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 10:57:02,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 10:57:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:57:02,294 INFO L225 Difference]: With dead ends: 45 [2022-04-06 10:57:02,294 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 10:57:02,296 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 10:57:02,298 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:57:02,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:57:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 10:57:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-04-06 10:57:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 10:57:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-04-06 10:57:02,321 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-04-06 10:57:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:57:02,321 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-04-06 10:57:02,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:57:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-04-06 10:57:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 10:57:02,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:57:02,322 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:57:02,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 10:57:02,322 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:57:02,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:57:02,323 INFO L85 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2022-04-06 10:57:02,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:57:02,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981088777] [2022-04-06 10:57:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:02,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:57:02,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:57:02,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306406822] [2022-04-06 10:57:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:02,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:57:02,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:57:02,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:57:02,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 10:57:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:57:02,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 10:57:02,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:57:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:57:02,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 10:57:02,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:57:02,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981088777] [2022-04-06 10:57:02,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:57:02,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306406822] [2022-04-06 10:57:02,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306406822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:57:02,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:57:02,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 10:57:02,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790899506] [2022-04-06 10:57:02,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:57:02,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 10:57:02,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:57:02,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 10:57:02,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:57:02,469 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:57:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:57:02,529 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-06 10:57:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 10:57:02,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 10:57:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:57:02,531 INFO L225 Difference]: With dead ends: 34 [2022-04-06 10:57:02,531 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 10:57:02,531 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 10:57:02,532 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:57:02,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:57:02,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 10:57:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-06 10:57:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:57:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-04-06 10:57:02,537 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-04-06 10:57:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:57:02,538 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-04-06 10:57:02,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 10:57:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-04-06 10:57:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 10:57:02,538 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:57:02,539 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:57:02,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 10:57:02,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:57:02,754 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:57:02,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:57:02,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2022-04-06 10:57:02,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:57:02,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694425589] [2022-04-06 10:57:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:02,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:57:02,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:57:02,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180842821] [2022-04-06 10:57:02,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:02,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:57:02,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:57:02,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:57:02,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 10:57:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:57:02,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 10:57:02,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:57:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:57:02,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:57:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 10:57:03,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:57:03,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694425589] [2022-04-06 10:57:03,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:57:03,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180842821] [2022-04-06 10:57:03,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180842821] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:57:03,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 10:57:03,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-04-06 10:57:03,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878828162] [2022-04-06 10:57:03,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 10:57:03,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 10:57:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:57:03,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 10:57:03,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 10:57:03,148 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:57:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:57:03,345 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-04-06 10:57:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 10:57:03,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2022-04-06 10:57:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:57:03,346 INFO L225 Difference]: With dead ends: 45 [2022-04-06 10:57:03,346 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 10:57:03,347 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-04-06 10:57:03,348 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:57:03,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:57:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 10:57:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-04-06 10:57:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 10:57:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-04-06 10:57:03,354 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-04-06 10:57:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:57:03,354 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-04-06 10:57:03,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:57:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-04-06 10:57:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 10:57:03,355 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:57:03,356 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:57:03,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 10:57:03,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 10:57:03,576 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:57:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:57:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2022-04-06 10:57:03,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:57:03,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185837520] [2022-04-06 10:57:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:03,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:57:03,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:57:03,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643653841] [2022-04-06 10:57:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:03,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:57:03,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:57:03,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:57:03,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 10:57:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:57:03,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 10:57:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:57:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:57:03,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:57:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:57:03,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:57:03,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185837520] [2022-04-06 10:57:03,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:57:03,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643653841] [2022-04-06 10:57:03,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643653841] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:57:03,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 10:57:03,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-04-06 10:57:03,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346211025] [2022-04-06 10:57:03,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 10:57:03,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 10:57:03,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:57:03,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 10:57:03,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 10:57:03,769 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:57:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:57:03,797 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-04-06 10:57:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 10:57:03,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 10:57:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:57:03,799 INFO L225 Difference]: With dead ends: 45 [2022-04-06 10:57:03,799 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 10:57:03,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:57:03,803 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:57:03,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 66 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:57:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 10:57:03,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-06 10:57:03,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 10:57:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-04-06 10:57:03,819 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 23 [2022-04-06 10:57:03,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:57:03,820 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-04-06 10:57:03,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 10:57:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-04-06 10:57:03,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 10:57:03,821 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:57:03,821 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:57:03,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 10:57:04,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:57:04,022 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:57:04,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:57:04,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2022-04-06 10:57:04,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:57:04,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88753414] [2022-04-06 10:57:04,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:04,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:57:04,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:57:04,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571234020] [2022-04-06 10:57:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:04,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:57:04,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:57:04,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:57:04,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 10:57:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:57:04,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 10:57:04,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:57:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 10:57:04,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:57:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 10:57:04,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:57:04,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88753414] [2022-04-06 10:57:04,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:57:04,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571234020] [2022-04-06 10:57:04,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571234020] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:57:04,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 10:57:04,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-04-06 10:57:04,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754859855] [2022-04-06 10:57:04,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 10:57:04,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 10:57:04,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:57:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 10:57:04,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-04-06 10:57:04,661 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 10:57:05,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:57:05,225 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2022-04-06 10:57:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 10:57:05,225 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-04-06 10:57:05,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:57:05,226 INFO L225 Difference]: With dead ends: 58 [2022-04-06 10:57:05,226 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 10:57:05,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 10:57:05,227 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:57:05,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 177 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 262 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-04-06 10:57:05,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 10:57:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2022-04-06 10:57:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 10:57:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-04-06 10:57:05,257 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2022-04-06 10:57:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:57:05,258 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-04-06 10:57:05,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 10:57:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-04-06 10:57:05,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 10:57:05,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:57:05,259 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:57:05,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 10:57:05,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:57:05,459 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:57:05,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:57:05,460 INFO L85 PathProgramCache]: Analyzing trace with hash -562648499, now seen corresponding path program 1 times [2022-04-06 10:57:05,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:57:05,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042200968] [2022-04-06 10:57:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:05,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:57:05,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:57:05,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411828604] [2022-04-06 10:57:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:05,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:57:05,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:57:05,473 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:57:05,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 10:57:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:57:05,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 10:57:05,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:57:05,668 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 10:57:05,670 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 10:57:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 10:57:05,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:57:05,955 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 10:57:09,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:57:09,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042200968] [2022-04-06 10:57:09,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:57:09,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411828604] [2022-04-06 10:57:09,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411828604] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:57:09,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 10:57:09,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 10:57:09,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196629156] [2022-04-06 10:57:09,756 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 10:57:09,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 10:57:09,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:57:09,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 10:57:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=350, Unknown=1, NotChecked=0, Total=420 [2022-04-06 10:57:09,757 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:57:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:57:10,131 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-04-06 10:57:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 10:57:10,131 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-06 10:57:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:57:10,132 INFO L225 Difference]: With dead ends: 62 [2022-04-06 10:57:10,132 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 10:57:10,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2022-04-06 10:57:10,133 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:57:10,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 164 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:57:10,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 10:57:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-04-06 10:57:10,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.15) internal successors, (46), 41 states have internal predecessors, (46), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 10:57:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2022-04-06 10:57:10,140 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 33 [2022-04-06 10:57:10,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:57:10,140 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2022-04-06 10:57:10,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 10:57:10,140 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2022-04-06 10:57:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 10:57:10,141 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:57:10,141 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:57:10,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 10:57:10,341 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:57:10,342 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:57:10,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:57:10,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1924864334, now seen corresponding path program 1 times [2022-04-06 10:57:10,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:57:10,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473449666] [2022-04-06 10:57:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:10,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:57:10,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:57:10,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081392931] [2022-04-06 10:57:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:57:10,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:57:10,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:57:10,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 10:57:10,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 10:57:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 10:57:10,451 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 10:57:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 10:57:10,493 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 10:57:10,494 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 10:57:10,494 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 10:57:10,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 10:57:10,696 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:57:10,699 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:57:10,701 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 10:57:10,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:57:10 BasicIcfg [2022-04-06 10:57:10,726 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 10:57:10,727 INFO L158 Benchmark]: Toolchain (without parser) took 9277.10ms. Allocated memory was 223.3MB in the beginning and 268.4MB in the end (delta: 45.1MB). Free memory was 172.3MB in the beginning and 106.2MB in the end (delta: 66.1MB). Peak memory consumption was 111.9MB. Max. memory is 8.0GB. [2022-04-06 10:57:10,727 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 223.3MB. Free memory is still 188.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 10:57:10,727 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.51ms. Allocated memory is still 223.3MB. Free memory was 172.1MB in the beginning and 198.6MB in the end (delta: -26.4MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. [2022-04-06 10:57:10,727 INFO L158 Benchmark]: Boogie Preprocessor took 15.99ms. Allocated memory is still 223.3MB. Free memory was 198.6MB in the beginning and 197.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 10:57:10,727 INFO L158 Benchmark]: RCFGBuilder took 248.81ms. Allocated memory is still 223.3MB. Free memory was 197.0MB in the beginning and 186.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 10:57:10,728 INFO L158 Benchmark]: IcfgTransformer took 36.53ms. Allocated memory is still 223.3MB. Free memory was 186.5MB in the beginning and 184.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 10:57:10,728 INFO L158 Benchmark]: TraceAbstraction took 8775.06ms. Allocated memory was 223.3MB in the beginning and 268.4MB in the end (delta: 45.1MB). Free memory was 184.4MB in the beginning and 106.2MB in the end (delta: 78.2MB). Peak memory consumption was 124.3MB. Max. memory is 8.0GB. [2022-04-06 10:57:10,729 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 223.3MB. Free memory is still 188.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.51ms. Allocated memory is still 223.3MB. Free memory was 172.1MB in the beginning and 198.6MB in the end (delta: -26.4MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.99ms. Allocated memory is still 223.3MB. Free memory was 198.6MB in the beginning and 197.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 248.81ms. Allocated memory is still 223.3MB. Free memory was 197.0MB in the beginning and 186.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 36.53ms. Allocated memory is still 223.3MB. Free memory was 186.5MB in the beginning and 184.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 8775.06ms. Allocated memory was 223.3MB in the beginning and 268.4MB in the end (delta: 45.1MB). Free memory was 184.4MB in the beginning and 106.2MB in the end (delta: 78.2MB). Peak memory consumption was 124.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [\old(counter)=5, counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [\old(counter)=0, counter=0, v=-1073741822, x=0, X=2147483644, Y=536870911, y=0] [L31] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, v=-1073741822, X=2147483644, x=0, Y=536870911, y=0] [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [\old(counter)=0, counter=1, v=-1073741822, x=0, x=0, X=2147483644, x=0, Y=536870911, y=0] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(counter)=0, counter=1, v=-1073741822, x=0, x=0, X=2147483644, x=0, Y=536870911, y=0] [L35] COND FALSE !(!(x <= X)) VAL [\old(counter)=0, counter=1, v=-1073741822, x=0, x=0, X=2147483644, x=0, Y=536870911, y=0] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [\old(counter)=0, counter=1, v=0, x=0, x=0, X=2147483644, x=0, y=0, Y=536870911] [L45] x++ VAL [\old(counter)=0, counter=1, v=0, X=2147483644, x=0, x=0, x=1, y=0, Y=536870911] [L31] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, v=0, x=0, x=1, X=2147483644, x=0, y=0, Y=536870911] [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [\old(counter)=0, counter=2, v=0, X=2147483644, x=1, x=536870911, x=0, Y=536870911, y=0] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(counter)=0, counter=2, v=0, x=1, x=0, x=536870911, X=2147483644, y=0, Y=536870911] [L35] COND FALSE !(!(x <= X)) VAL [\old(counter)=0, counter=2, v=0, X=2147483644, x=0, x=1, x=536870911, y=0, Y=536870911] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [\old(counter)=0, counter=2, v=-3221225466, x=1, x=0, X=2147483644, x=536870911, Y=536870911, y=1] [L45] x++ VAL [\old(counter)=0, counter=2, v=-3221225466, x=2, x=536870911, x=0, X=2147483644, Y=536870911, y=1] [L31] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, v=-3221225466, x=536870911, x=0, X=2147483644, x=2, y=1, Y=536870911] [L31] COND FALSE !(counter++<2) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x VAL [\old(counter)=0, counter=3, v=-3221225466, x=1073741822, X=2147483644, x=2, x=2, Y=536870911, y=1] [L49] CALL __VERIFIER_assert(2*yx - 2*xy - X + (long long) 2*Y - v + 2*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L14] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L16] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.7s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 91 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 89 mSDsluCounter, 594 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 94 IncrementalHoareTripleChecker+Unchecked, 478 mSDsCounter, 47 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 801 IncrementalHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 47 mSolverCounterUnsat, 116 mSDtfsCounter, 801 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 241 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=6, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 17 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 196 ConstructedInterpolants, 4 QuantifiedInterpolants, 1438 SizeOfPredicates, 22 NumberOfNonLiveVariables, 533 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 35/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-06 10:57:10,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...