/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/dijkstra-u_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 22:00:09,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 22:00:09,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 22:00:09,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 22:00:09,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 22:00:09,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 22:00:09,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 22:00:09,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 22:00:09,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 22:00:09,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 22:00:09,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 22:00:09,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 22:00:09,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 22:00:09,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 22:00:09,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 22:00:09,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 22:00:09,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 22:00:09,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 22:00:09,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 22:00:09,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 22:00:09,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 22:00:09,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 22:00:09,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 22:00:09,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 22:00:09,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 22:00:09,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 22:00:09,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 22:00:09,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 22:00:09,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 22:00:09,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-23 22:00:09,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 22:00:09,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 22:00:09,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 22:00:09,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 22:00:09,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 22:00:09,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 22:00:09,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 22:00:09,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 22:00:09,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 22:00:09,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 22:00:09,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 22:00:09,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 22:00:09,411 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 22:00:09,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 22:00:09,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 22:00:09,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 22:00:09,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 22:00:09,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 22:00:09,413 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 22:00:09,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 22:00:09,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 22:00:09,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 22:00:09,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 22:00:09,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 22:00:09,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 22:00:09,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 22:00:09,415 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 22:00:09,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 22:00:09,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 22:00:09,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 22:00:09,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 22:00:09,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:00:09,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 22:00:09,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 22:00:09,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 22:00:09,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 22:00:09,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 22:00:09,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 22:00:09,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 22:00:09,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 22:00:09,417 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 22:00:09,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 22:00:09,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 22:00:09,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 22:00:09,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 22:00:09,621 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 22:00:09,622 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 22:00:09,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2022-02-23 22:00:09,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e7b0be03/a84f4007f8a74aceae9ff7be7b9a089f/FLAGe3005c621 [2022-02-23 22:00:10,005 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 22:00:10,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2022-02-23 22:00:10,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e7b0be03/a84f4007f8a74aceae9ff7be7b9a089f/FLAGe3005c621 [2022-02-23 22:00:10,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e7b0be03/a84f4007f8a74aceae9ff7be7b9a089f [2022-02-23 22:00:10,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 22:00:10,021 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 22:00:10,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 22:00:10,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 22:00:10,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 22:00:10,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:00:10" (1/1) ... [2022-02-23 22:00:10,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32de16b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:10, skipping insertion in model container [2022-02-23 22:00:10,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:00:10" (1/1) ... [2022-02-23 22:00:10,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 22:00:10,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 22:00:10,156 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/dijkstra-u_unwindbound2.c[525,538] [2022-02-23 22:00:10,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:00:10,195 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 22:00:10,204 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/dijkstra-u_unwindbound2.c[525,538] [2022-02-23 22:00:10,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:00:10,227 INFO L208 MainTranslator]: Completed translation [2022-02-23 22:00:10,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:10 WrapperNode [2022-02-23 22:00:10,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 22:00:10,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 22:00:10,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 22:00:10,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 22:00:10,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:10" (1/1) ... [2022-02-23 22:00:10,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:10" (1/1) ... [2022-02-23 22:00:10,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:10" (1/1) ... [2022-02-23 22:00:10,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:10" (1/1) ... [2022-02-23 22:00:10,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:10" (1/1) ... [2022-02-23 22:00:10,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:10" (1/1) ... [2022-02-23 22:00:10,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:10" (1/1) ... [2022-02-23 22:00:10,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 22:00:10,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 22:00:10,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 22:00:10,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 22:00:10,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:10" (1/1) ... [2022-02-23 22:00:10,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:00:10,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:10,287 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) [2022-02-23 22:00:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 22:00:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 22:00:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 22:00:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 22:00:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 22:00:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 22:00:10,313 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 22:00:10,313 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 22:00:10,313 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 22:00:10,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 22:00:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 22:00:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 22:00:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 22:00:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 22:00:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 22:00:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 22:00:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 22:00:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 22:00:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 22:00:10,305 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 [2022-02-23 22:00:10,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 22:00:10,363 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 22:00:10,365 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 22:00:10,510 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 22:00:10,514 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 22:00:10,514 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 22:00:10,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:00:10 BoogieIcfgContainer [2022-02-23 22:00:10,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 22:00:10,516 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 22:00:10,516 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 22:00:10,519 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 22:00:10,521 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:00:10" (1/1) ... [2022-02-23 22:00:10,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:00:10 BasicIcfg [2022-02-23 22:00:10,551 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 22:00:10,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 22:00:10,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 22:00:10,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 22:00:10,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:00:10" (1/4) ... [2022-02-23 22:00:10,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3a626d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:00:10, skipping insertion in model container [2022-02-23 22:00:10,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:10" (2/4) ... [2022-02-23 22:00:10,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3a626d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:00:10, skipping insertion in model container [2022-02-23 22:00:10,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:00:10" (3/4) ... [2022-02-23 22:00:10,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3a626d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:00:10, skipping insertion in model container [2022-02-23 22:00:10,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:00:10" (4/4) ... [2022-02-23 22:00:10,556 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound2.cqvasr [2022-02-23 22:00:10,559 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 22:00:10,559 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 22:00:10,596 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 22:00:10,600 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=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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 22:00:10,600 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 22:00:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 22:00:10,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 22:00:10,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:10,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:10,633 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash -460462115, now seen corresponding path program 1 times [2022-02-23 22:00:10,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:10,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076084463] [2022-02-23 22:00:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:10,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:10,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:00:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:10,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:00:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:10,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:10,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076084463] [2022-02-23 22:00:10,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076084463] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:10,790 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:10,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 22:00:10,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843033308] [2022-02-23 22:00:10,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:10,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 22:00:10,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:10,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 22:00:10,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:00:10,822 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 22:00:12,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:12,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:12,995 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2022-02-23 22:00:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 22:00:12,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-23 22:00:12,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:13,002 INFO L225 Difference]: With dead ends: 70 [2022-02-23 22:00:13,002 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 22:00:13,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:00:13,006 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:13,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-02-23 22:00:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 22:00:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-02-23 22:00:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 22:00:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-02-23 22:00:13,033 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2022-02-23 22:00:13,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:13,033 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-02-23 22:00:13,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 22:00:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-02-23 22:00:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-23 22:00:13,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:13,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:13,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 22:00:13,034 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:13,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:13,035 INFO L85 PathProgramCache]: Analyzing trace with hash -889932734, now seen corresponding path program 1 times [2022-02-23 22:00:13,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:13,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780935371] [2022-02-23 22:00:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:13,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:13,048 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:00:13,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975709251] [2022-02-23 22:00:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:13,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:13,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:13,050 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) [2022-02-23 22:00:13,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 22:00:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:13,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 22:00:13,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:13,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:00:13,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:13,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780935371] [2022-02-23 22:00:13,192 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:00:13,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975709251] [2022-02-23 22:00:13,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975709251] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:13,193 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:13,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 22:00:13,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644627041] [2022-02-23 22:00:13,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:13,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 22:00:13,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:13,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 22:00:13,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 22:00:13,195 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 22:00:13,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:13,209 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2022-02-23 22:00:13,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 22:00:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-23 22:00:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:13,211 INFO L225 Difference]: With dead ends: 55 [2022-02-23 22:00:13,211 INFO L226 Difference]: Without dead ends: 36 [2022-02-23 22:00:13,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 22:00:13,213 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:13,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:00:13,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-23 22:00:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-23 22:00:13,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 22:00:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-02-23 22:00:13,219 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2022-02-23 22:00:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:13,220 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-02-23 22:00:13,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 22:00:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-02-23 22:00:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-23 22:00:13,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:13,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:13,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 22:00:13,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:13,432 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:13,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1699853977, now seen corresponding path program 1 times [2022-02-23 22:00:13,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:13,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430260763] [2022-02-23 22:00:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:13,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:13,442 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:00:13,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177457402] [2022-02-23 22:00:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:13,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:13,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:13,444 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) [2022-02-23 22:00:13,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 22:00:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:13,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:00:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:13,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:00:13,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:13,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430260763] [2022-02-23 22:00:13,535 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:00:13,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177457402] [2022-02-23 22:00:13,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177457402] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:13,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:13,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:00:13,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839545180] [2022-02-23 22:00:13,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:13,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:00:13,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:00:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:00:13,536 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 22:00:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:13,558 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-02-23 22:00:13,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:00:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-02-23 22:00:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:13,559 INFO L225 Difference]: With dead ends: 49 [2022-02-23 22:00:13,559 INFO L226 Difference]: Without dead ends: 40 [2022-02-23 22:00:13,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:00:13,561 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:13,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:00:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-23 22:00:13,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-02-23 22:00:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 22:00:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-02-23 22:00:13,568 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2022-02-23 22:00:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:13,568 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-02-23 22:00:13,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 22:00:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-02-23 22:00:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-23 22:00:13,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:13,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:13,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 22:00:13,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 22:00:13,779 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:13,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1700986035, now seen corresponding path program 1 times [2022-02-23 22:00:13,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:13,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33385752] [2022-02-23 22:00:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:13,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:13,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:00:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:00:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:13,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:13,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33385752] [2022-02-23 22:00:13,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33385752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:13,954 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:13,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 22:00:13,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976256417] [2022-02-23 22:00:13,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:13,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 22:00:13,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:13,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 22:00:13,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 22:00:13,955 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 22:00:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:16,027 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2022-02-23 22:00:16,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 22:00:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-02-23 22:00:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:16,028 INFO L225 Difference]: With dead ends: 72 [2022-02-23 22:00:16,028 INFO L226 Difference]: Without dead ends: 51 [2022-02-23 22:00:16,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-23 22:00:16,030 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:16,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 133 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-23 22:00:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-23 22:00:16,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-23 22:00:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 22:00:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-02-23 22:00:16,042 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2022-02-23 22:00:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:16,042 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-02-23 22:00:16,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 22:00:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-02-23 22:00:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 22:00:16,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:16,043 INFO L514 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] [2022-02-23 22:00:16,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 22:00:16,044 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:16,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1908885951, now seen corresponding path program 1 times [2022-02-23 22:00:16,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:16,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289738189] [2022-02-23 22:00:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:16,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:16,055 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:00:16,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822700251] [2022-02-23 22:00:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:16,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:16,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:16,056 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) [2022-02-23 22:00:16,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 22:00:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:16,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:00:16,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:16,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:00:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:16,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:16,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289738189] [2022-02-23 22:00:16,210 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:00:16,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822700251] [2022-02-23 22:00:16,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822700251] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:00:16,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:00:16,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-02-23 22:00:16,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700537986] [2022-02-23 22:00:16,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:00:16,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:00:16,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:16,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:00:16,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:00:16,216 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:00:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:16,247 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2022-02-23 22:00:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:00:16,247 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 22:00:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:16,249 INFO L225 Difference]: With dead ends: 72 [2022-02-23 22:00:16,249 INFO L226 Difference]: Without dead ends: 53 [2022-02-23 22:00:16,250 INFO L932 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 [2022-02-23 22:00:16,250 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:16,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:00:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-23 22:00:16,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-02-23 22:00:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 22:00:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2022-02-23 22:00:16,263 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 23 [2022-02-23 22:00:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:16,263 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2022-02-23 22:00:16,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:00:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2022-02-23 22:00:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 22:00:16,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:16,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:16,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 22:00:16,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:16,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:16,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1731080004, now seen corresponding path program 1 times [2022-02-23 22:00:16,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:16,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007669542] [2022-02-23 22:00:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:16,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:16,498 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:00:16,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77699506] [2022-02-23 22:00:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:16,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:16,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:16,501 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) [2022-02-23 22:00:16,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 22:00:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:16,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:00:16,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 22:00:16,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:00:16,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:16,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007669542] [2022-02-23 22:00:16,678 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:00:16,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77699506] [2022-02-23 22:00:16,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77699506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:16,678 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:16,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:00:16,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041864957] [2022-02-23 22:00:16,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:16,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:00:16,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:16,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:00:16,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:00:16,679 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 22:00:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:17,451 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2022-02-23 22:00:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:00:17,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-02-23 22:00:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:17,453 INFO L225 Difference]: With dead ends: 75 [2022-02-23 22:00:17,453 INFO L226 Difference]: Without dead ends: 54 [2022-02-23 22:00:17,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:00:17,454 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 8 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:17,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 175 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-23 22:00:17,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-23 22:00:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-23 22:00:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:00:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2022-02-23 22:00:17,461 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 24 [2022-02-23 22:00:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:17,461 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2022-02-23 22:00:17,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 22:00:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2022-02-23 22:00:17,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 22:00:17,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:17,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:17,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 22:00:17,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:17,666 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:17,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1729947946, now seen corresponding path program 1 times [2022-02-23 22:00:17,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:17,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595396828] [2022-02-23 22:00:17,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:17,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:17,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:00:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:17,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:00:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:17,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:17,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595396828] [2022-02-23 22:00:17,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595396828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:17,733 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:17,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 22:00:17,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964970593] [2022-02-23 22:00:17,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:17,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 22:00:17,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:17,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 22:00:17,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-23 22:00:17,734 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 22:00:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:17,852 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2022-02-23 22:00:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 22:00:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-02-23 22:00:17,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:17,853 INFO L225 Difference]: With dead ends: 66 [2022-02-23 22:00:17,853 INFO L226 Difference]: Without dead ends: 32 [2022-02-23 22:00:17,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-02-23 22:00:17,854 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:17,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 42 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:00:17,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-23 22:00:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-23 22:00:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 22:00:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-02-23 22:00:17,857 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 24 [2022-02-23 22:00:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:17,857 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-02-23 22:00:17,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 22:00:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-02-23 22:00:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 22:00:17,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:17,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:17,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-23 22:00:17,858 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1279154140, now seen corresponding path program 1 times [2022-02-23 22:00:17,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:17,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918902864] [2022-02-23 22:00:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:17,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:17,865 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:00:17,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174553014] [2022-02-23 22:00:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:17,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:17,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:17,870 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) [2022-02-23 22:00:17,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 22:00:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:17,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:00:17,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-23 22:00:18,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:00:18,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:18,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918902864] [2022-02-23 22:00:18,024 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:00:18,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174553014] [2022-02-23 22:00:18,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174553014] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:18,024 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:18,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:00:18,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219364309] [2022-02-23 22:00:18,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:18,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:00:18,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:18,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:00:18,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:00:18,026 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:00:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:18,041 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-02-23 22:00:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:00:18,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-02-23 22:00:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:18,041 INFO L225 Difference]: With dead ends: 32 [2022-02-23 22:00:18,041 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 22:00:18,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:00:18,042 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:18,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 79 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:00:18,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 22:00:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 22:00:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 22:00:18,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 22:00:18,043 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-02-23 22:00:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:18,043 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 22:00:18,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:00:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 22:00:18,043 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 22:00:18,045 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 22:00:18,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 22:00:18,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:18,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-23 22:00:18,467 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-23 22:00:18,468 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-23 22:00:18,468 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-23 22:00:18,468 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-23 22:00:18,468 INFO L854 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0)) [2022-02-23 22:00:18,468 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-23 22:00:18,468 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-23 22:00:18,468 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-02-23 22:00:18,468 INFO L858 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-02-23 22:00:18,468 INFO L858 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2022-02-23 22:00:18,468 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2022-02-23 22:00:18,468 INFO L854 garLoopResultBuilder]: At program point mainENTRY(lines 20 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 0 ~counter~0) (<= ~counter~0 0)) (not (<= 0 |old(~counter~0)|))) [2022-02-23 22:00:18,468 INFO L854 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 0 ~counter~0) (<= ~counter~0 0)) (not (<= 0 |old(~counter~0)|))) [2022-02-23 22:00:18,468 INFO L858 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2022-02-23 22:00:18,469 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 35) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~n~0 main_~r~0)) (.cse2 (= main_~h~0 0))) (or (and .cse0 .cse1 (<= 1 ~counter~0) .cse2) (not (<= |old(~counter~0)| 0)) (and .cse0 .cse1 (<= 0 ~counter~0) .cse2 (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|)))) [2022-02-23 22:00:18,469 INFO L858 garLoopResultBuilder]: For program point L52-2(lines 20 61) no Hoare annotation was computed. [2022-02-23 22:00:18,469 INFO L858 garLoopResultBuilder]: For program point L30-1(lines 30 35) no Hoare annotation was computed. [2022-02-23 22:00:18,469 INFO L854 garLoopResultBuilder]: At program point L38-2(lines 38 56) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~n~0 main_~r~0)) (.cse2 (= main_~h~0 0))) (or (not (<= |old(~counter~0)| 0)) (and (<= 2 ~counter~0) .cse0 .cse1 .cse2) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) .cse0 .cse1 .cse2 (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|)))) [2022-02-23 22:00:18,469 INFO L858 garLoopResultBuilder]: For program point L38(lines 38 56) no Hoare annotation was computed. [2022-02-23 22:00:18,469 INFO L858 garLoopResultBuilder]: For program point L31(lines 31 32) no Hoare annotation was computed. [2022-02-23 22:00:18,469 INFO L854 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~n~0 main_~r~0))) (or (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) .cse0 .cse1 (= main_~q~0 1)) (not (<= |old(~counter~0)| 0)) (and (<= 2 ~counter~0) .cse0 .cse1 (= main_~h~0 0)) (not (<= 0 |old(~counter~0)|)))) [2022-02-23 22:00:18,469 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) (= main_~p~0 0) (= main_~n~0 main_~r~0) (= main_~h~0 0) (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-02-23 22:00:18,469 INFO L854 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0))) (or (and .cse0 (= main_~h~0 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) .cse0 (= main_~n~0 main_~r~0) (= main_~q~0 1)) (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)))) [2022-02-23 22:00:18,469 INFO L854 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) (= main_~p~0 0) (= main_~n~0 main_~r~0) (= main_~h~0 0) (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-02-23 22:00:18,469 INFO L858 garLoopResultBuilder]: For program point L59(line 59) no Hoare annotation was computed. [2022-02-23 22:00:18,470 INFO L854 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) (= main_~p~0 0) (= main_~n~0 main_~r~0) (= main_~h~0 0) (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-02-23 22:00:18,470 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 20 61) no Hoare annotation was computed. [2022-02-23 22:00:18,470 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) (= main_~p~0 0) (= main_~n~0 main_~r~0) (= main_~h~0 0) (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-02-23 22:00:18,470 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 20 61) no Hoare annotation was computed. [2022-02-23 22:00:18,470 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) (= main_~p~0 0) (= main_~n~0 main_~r~0) (= main_~h~0 0) (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-02-23 22:00:18,470 INFO L854 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= (+ (* (div (+ (* main_~p~0 2) main_~q~0) 4294967296) 4294967296) main_~r~0 1) (+ main_~q~0 (* (div main_~r~0 4294967296) 4294967296))) (= main_~p~0 0) (= main_~n~0 main_~r~0) (= main_~h~0 0) (= main_~q~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-02-23 22:00:18,470 INFO L858 garLoopResultBuilder]: For program point L44(lines 38 56) no Hoare annotation was computed. [2022-02-23 22:00:18,470 INFO L858 garLoopResultBuilder]: For program point L52(lines 52 55) no Hoare annotation was computed. [2022-02-23 22:00:18,470 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-02-23 22:00:18,470 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-02-23 22:00:18,470 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-02-23 22:00:18,470 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-02-23 22:00:18,470 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-02-23 22:00:18,470 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-02-23 22:00:18,473 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:18,473 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 22:00:18,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:00:18 BasicIcfg [2022-02-23 22:00:18,482 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 22:00:18,482 INFO L158 Benchmark]: Toolchain (without parser) took 8461.58ms. Allocated memory was 187.7MB in the beginning and 247.5MB in the end (delta: 59.8MB). Free memory was 137.0MB in the beginning and 161.2MB in the end (delta: -24.2MB). Peak memory consumption was 34.6MB. Max. memory is 8.0GB. [2022-02-23 22:00:18,483 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 187.7MB. Free memory is still 153.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 22:00:18,483 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.62ms. Allocated memory was 187.7MB in the beginning and 247.5MB in the end (delta: 59.8MB). Free memory was 136.8MB in the beginning and 223.6MB in the end (delta: -86.8MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. [2022-02-23 22:00:18,483 INFO L158 Benchmark]: Boogie Preprocessor took 23.44ms. Allocated memory is still 247.5MB. Free memory was 223.6MB in the beginning and 222.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 22:00:18,483 INFO L158 Benchmark]: RCFGBuilder took 263.77ms. Allocated memory is still 247.5MB. Free memory was 222.0MB in the beginning and 208.4MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-02-23 22:00:18,483 INFO L158 Benchmark]: IcfgTransformer took 35.25ms. Allocated memory is still 247.5MB. Free memory was 208.4MB in the beginning and 206.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 22:00:18,484 INFO L158 Benchmark]: TraceAbstraction took 7929.77ms. Allocated memory is still 247.5MB. Free memory was 205.8MB in the beginning and 161.2MB in the end (delta: 44.6MB). Peak memory consumption was 44.1MB. Max. memory is 8.0GB. [2022-02-23 22:00:18,485 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 187.7MB. Free memory is still 153.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 205.62ms. Allocated memory was 187.7MB in the beginning and 247.5MB in the end (delta: 59.8MB). Free memory was 136.8MB in the beginning and 223.6MB in the end (delta: -86.8MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.44ms. Allocated memory is still 247.5MB. Free memory was 223.6MB in the beginning and 222.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 263.77ms. Allocated memory is still 247.5MB. Free memory was 222.0MB in the beginning and 208.4MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 35.25ms. Allocated memory is still 247.5MB. Free memory was 208.4MB in the beginning and 206.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 7929.77ms. Allocated memory is still 247.5MB. Free memory was 205.8MB in the beginning and 161.2MB in the end (delta: 44.6MB). Peak memory consumption was 44.1MB. 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 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.9s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 107 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 899 SdHoareTripleChecker+Invalid, 5.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 577 mSDsCounter, 84 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 321 IncrementalHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 84 mSolverCounterUnsat, 322 mSDtfsCounter, 321 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=6, InterpolantAutomatonStates: 46, 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, 8 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 17 LocationsWithAnnotation, 84 PreInvPairs, 99 NumberOfFragments, 495 HoareAnnotationTreeSize, 84 FomulaSimplifications, 4 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 17 FomulaSimplificationsInter, 58 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 194 ConstructedInterpolants, 0 QuantifiedInterpolants, 594 SizeOfPredicates, 7 NumberOfNonLiveVariables, 461 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 11/15 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (((((p == 0 && n == r) && 1 <= counter) && h == 0) || !(\old(counter) <= 0)) || ((((p == 0 && n == r) && 0 <= counter) && h == 0) && q == 1)) || !(0 <= \old(counter)) RESULT: Ultimate proved your program to be correct! [2022-02-23 22:00:18,499 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...