/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/egcd3-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 10:18:25,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 10:18:25,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 10:18:25,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 10:18:25,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 10:18:25,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 10:18:25,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 10:18:25,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 10:18:25,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 10:18:25,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 10:18:25,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 10:18:25,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 10:18:25,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 10:18:25,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 10:18:25,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 10:18:25,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 10:18:25,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 10:18:25,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 10:18:25,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 10:18:25,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 10:18:25,274 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 10:18:25,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 10:18:25,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 10:18:25,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 10:18:25,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 10:18:25,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 10:18:25,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 10:18:25,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 10:18:25,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 10:18:25,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 10:18:25,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-20 10:18:25,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 10:18:25,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 10:18:25,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 10:18:25,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 10:18:25,326 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 10:18:25,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 10:18:25,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 10:18:25,343 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 10:18:25,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 10:18:25,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 10:18:25,344 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 10:18:25,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 10:18:25,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 10:18:25,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 10:18:25,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 10:18:25,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 10:18:25,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 10:18:25,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 10:18:25,345 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 10:18:25,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 10:18:25,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 10:18:25,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 10:18:25,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 10:18:25,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:18:25,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 10:18:25,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 10:18:25,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 10:18:25,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 10:18:25,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 10:18:25,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 10:18:25,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 10:18:25,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 10:18:25,346 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 10:18:25,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 10:18:25,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 10:18:25,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 10:18:25,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 10:18:25,508 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 10:18:25,508 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 10:18:25,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2022-03-20 10:18:25,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40fa9789/330baaba88ae44feac83267c399f3d0d/FLAG7a5232f3f [2022-03-20 10:18:25,925 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 10:18:25,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2022-03-20 10:18:25,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40fa9789/330baaba88ae44feac83267c399f3d0d/FLAG7a5232f3f [2022-03-20 10:18:26,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40fa9789/330baaba88ae44feac83267c399f3d0d [2022-03-20 10:18:26,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 10:18:26,359 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 10:18:26,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 10:18:26,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 10:18:26,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 10:18:26,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:18:26" (1/1) ... [2022-03-20 10:18:26,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bf7f758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:26, skipping insertion in model container [2022-03-20 10:18:26,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:18:26" (1/1) ... [2022-03-20 10:18:26,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 10:18:26,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 10:18:26,512 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/egcd3-ll_unwindbound20.c[490,503] [2022-03-20 10:18:26,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:18:26,545 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 10:18:26,559 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/egcd3-ll_unwindbound20.c[490,503] [2022-03-20 10:18:26,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:18:26,578 INFO L208 MainTranslator]: Completed translation [2022-03-20 10:18:26,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:26 WrapperNode [2022-03-20 10:18:26,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 10:18:26,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 10:18:26,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 10:18:26,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 10:18:26,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:26" (1/1) ... [2022-03-20 10:18:26,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:26" (1/1) ... [2022-03-20 10:18:26,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:26" (1/1) ... [2022-03-20 10:18:26,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:26" (1/1) ... [2022-03-20 10:18:26,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:26" (1/1) ... [2022-03-20 10:18:26,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:26" (1/1) ... [2022-03-20 10:18:26,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:26" (1/1) ... [2022-03-20 10:18:26,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 10:18:26,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 10:18:26,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 10:18:26,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 10:18:26,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:26" (1/1) ... [2022-03-20 10:18:26,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:18:26,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:26,653 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) [2022-03-20 10:18:26,671 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 [2022-03-20 10:18:26,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 10:18:26,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 10:18:26,682 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 10:18:26,682 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 10:18:26,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 10:18:26,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 10:18:26,682 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 10:18:26,683 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 10:18:26,684 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 10:18:26,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 10:18:26,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 10:18:26,685 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 10:18:26,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 10:18:26,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 10:18:26,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 10:18:26,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 10:18:26,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 10:18:26,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 10:18:26,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 10:18:26,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 10:18:26,770 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 10:18:26,772 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 10:18:26,882 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 10:18:26,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 10:18:26,886 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 10:18:26,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:18:26 BoogieIcfgContainer [2022-03-20 10:18:26,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 10:18:26,888 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 10:18:26,888 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 10:18:26,889 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 10:18:26,891 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:18:26" (1/1) ... [2022-03-20 10:18:26,892 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 10:18:26,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:18:26 BasicIcfg [2022-03-20 10:18:26,922 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 10:18:26,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 10:18:26,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 10:18:26,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 10:18:26,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:18:26" (1/4) ... [2022-03-20 10:18:26,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655398b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:18:26, skipping insertion in model container [2022-03-20 10:18:26,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:18:26" (2/4) ... [2022-03-20 10:18:26,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655398b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:18:26, skipping insertion in model container [2022-03-20 10:18:26,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:18:26" (3/4) ... [2022-03-20 10:18:26,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655398b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:18:26, skipping insertion in model container [2022-03-20 10:18:26,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:18:26" (4/4) ... [2022-03-20 10:18:26,958 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.cqvasr [2022-03-20 10:18:26,962 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 10:18:26,962 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 10:18:27,003 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 10:18:27,007 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 10:18:27,008 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 10:18:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 10:18:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 10:18:27,028 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:27,028 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:27,029 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:27,032 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-03-20 10:18:27,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:27,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944887977] [2022-03-20 10:18:27,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:27,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:27,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 10:18:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:27,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 10:18:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:27,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 10:18:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:18:27,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:27,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944887977] [2022-03-20 10:18:27,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944887977] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:27,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:27,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 10:18:27,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312501251] [2022-03-20 10:18:27,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:27,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 10:18:27,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:27,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 10:18:27,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:18:27,206 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:18:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:27,309 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-03-20 10:18:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 10:18:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 10:18:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:27,316 INFO L225 Difference]: With dead ends: 74 [2022-03-20 10:18:27,316 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 10:18:27,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:18:27,324 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:27,325 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:18:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 10:18:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-20 10:18:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 10:18:27,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-03-20 10:18:27,352 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-03-20 10:18:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:27,353 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-03-20 10:18:27,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:18:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-03-20 10:18:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 10:18:27,354 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:27,354 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:27,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 10:18:27,354 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:27,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-03-20 10:18:27,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:27,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689144208] [2022-03-20 10:18:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:27,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:27,368 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:27,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155576603] [2022-03-20 10:18:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:27,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:27,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:27,370 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) [2022-03-20 10:18:27,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 10:18:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:27,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 10:18:27,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:18:27,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:18:27,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:27,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689144208] [2022-03-20 10:18:27,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:27,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155576603] [2022-03-20 10:18:27,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155576603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:27,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:27,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 10:18:27,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162155161] [2022-03-20 10:18:27,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:27,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 10:18:27,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:27,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 10:18:27,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:18:27,489 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:18:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:27,500 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-03-20 10:18:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 10:18:27,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 10:18:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:27,501 INFO L225 Difference]: With dead ends: 44 [2022-03-20 10:18:27,501 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 10:18:27,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:18:27,502 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:27,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:27,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 10:18:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 10:18:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 10:18:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-20 10:18:27,507 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-03-20 10:18:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:27,508 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-20 10:18:27,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:18:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-20 10:18:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 10:18:27,509 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:27,509 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:27,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:27,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:27,726 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:27,726 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-03-20 10:18:27,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:27,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221992075] [2022-03-20 10:18:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:27,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:27,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:27,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219249177] [2022-03-20 10:18:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:27,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:27,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:27,757 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) [2022-03-20 10:18:27,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 10:18:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:27,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:18:27,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 10:18:27,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:18:27,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221992075] [2022-03-20 10:18:27,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219249177] [2022-03-20 10:18:27,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219249177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:27,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:27,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:18:27,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147056694] [2022-03-20 10:18:27,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:27,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:18:27,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:18:27,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:18:27,942 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:18:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:28,010 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-03-20 10:18:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:18:28,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-20 10:18:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:28,014 INFO L225 Difference]: With dead ends: 57 [2022-03-20 10:18:28,014 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 10:18:28,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:18:28,016 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:28,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:28,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 10:18:28,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-03-20 10:18:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 10:18:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-03-20 10:18:28,028 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-03-20 10:18:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:28,028 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-03-20 10:18:28,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:18:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-03-20 10:18:28,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 10:18:28,029 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:28,029 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:28,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:28,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 10:18:28,247 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:28,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-03-20 10:18:28,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:28,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563864689] [2022-03-20 10:18:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:28,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:28,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:28,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143856343] [2022-03-20 10:18:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:28,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:28,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:28,262 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) [2022-03-20 10:18:28,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 10:18:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:18:28,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:18:28,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:18:28,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:28,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563864689] [2022-03-20 10:18:28,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:28,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143856343] [2022-03-20 10:18:28,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143856343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:28,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:28,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:18:28,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804204350] [2022-03-20 10:18:28,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:28,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:18:28,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:18:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:18:28,389 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:18:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:28,410 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-03-20 10:18:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:18:28,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-20 10:18:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:28,411 INFO L225 Difference]: With dead ends: 62 [2022-03-20 10:18:28,411 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 10:18:28,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:18:28,412 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:28,413 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:28,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 10:18:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-20 10:18:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 10:18:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-03-20 10:18:28,417 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-03-20 10:18:28,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:28,417 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-03-20 10:18:28,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:18:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-03-20 10:18:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 10:18:28,417 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:28,417 INFO L499 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] [2022-03-20 10:18:28,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:28,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:28,634 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:28,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:28,635 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-03-20 10:18:28,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:28,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076409397] [2022-03-20 10:18:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:28,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:28,657 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:28,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572339806] [2022-03-20 10:18:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:28,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:28,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:28,660 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) [2022-03-20 10:18:28,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 10:18:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:28,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 10:18:28,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 10:18:28,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:18:28,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:28,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076409397] [2022-03-20 10:18:28,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:28,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572339806] [2022-03-20 10:18:28,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572339806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:28,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:28,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 10:18:28,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027350510] [2022-03-20 10:18:28,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:28,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:18:28,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:28,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:18:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:18:28,949 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:18:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:29,092 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-03-20 10:18:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 10:18:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-03-20 10:18:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:29,093 INFO L225 Difference]: With dead ends: 68 [2022-03-20 10:18:29,093 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 10:18:29,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:18:29,094 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 79 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:29,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 239 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:18:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 10:18:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-03-20 10:18:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 10:18:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-03-20 10:18:29,101 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-03-20 10:18:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:29,101 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-03-20 10:18:29,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:18:29,101 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-03-20 10:18:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 10:18:29,102 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:29,102 INFO L499 BasicCegarLoop]: trace histogram [2, 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] [2022-03-20 10:18:29,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:29,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:29,315 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:29,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-03-20 10:18:29,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:29,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875274859] [2022-03-20 10:18:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:29,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:29,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:29,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080400471] [2022-03-20 10:18:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:29,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:29,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:29,335 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) [2022-03-20 10:18:29,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 10:18:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:29,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:18:29,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:18:29,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:18:29,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:29,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875274859] [2022-03-20 10:18:29,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:29,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080400471] [2022-03-20 10:18:29,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080400471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:18:29,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:18:29,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 10:18:29,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591966052] [2022-03-20 10:18:29,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:29,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:18:29,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:29,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:18:29,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:18:29,597 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 10:18:29,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:29,699 INFO L93 Difference]: Finished difference Result 151 states and 197 transitions. [2022-03-20 10:18:29,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 10:18:29,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-03-20 10:18:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:29,702 INFO L225 Difference]: With dead ends: 151 [2022-03-20 10:18:29,702 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 10:18:29,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-03-20 10:18:29,704 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 82 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:29,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 272 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:18:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 10:18:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2022-03-20 10:18:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 72 states have internal predecessors, (93), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 10:18:29,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-03-20 10:18:29,731 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 30 [2022-03-20 10:18:29,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:29,732 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-03-20 10:18:29,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 10:18:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-03-20 10:18:29,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 10:18:29,736 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:29,736 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:29,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:29,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:29,940 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:29,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:29,940 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-03-20 10:18:29,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:29,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773202183] [2022-03-20 10:18:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:29,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:29,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154396891] [2022-03-20 10:18:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:29,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:29,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:29,950 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:29,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 10:18:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:29,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:18:29,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 10:18:30,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 10:18:30,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773202183] [2022-03-20 10:18:30,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154396891] [2022-03-20 10:18:30,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154396891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:18:30,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:18:30,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 10:18:30,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381628750] [2022-03-20 10:18:30,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:30,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 10:18:30,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:30,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 10:18:30,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 10:18:30,154 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:18:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:30,293 INFO L93 Difference]: Finished difference Result 187 states and 265 transitions. [2022-03-20 10:18:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 10:18:30,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-20 10:18:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:30,295 INFO L225 Difference]: With dead ends: 187 [2022-03-20 10:18:30,295 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 10:18:30,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 10:18:30,296 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 113 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:30,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 362 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:18:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 10:18:30,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2022-03-20 10:18:30,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 98 states have (on average 1.346938775510204) internal successors, (132), 99 states have internal predecessors, (132), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 10:18:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2022-03-20 10:18:30,307 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 31 [2022-03-20 10:18:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:30,307 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2022-03-20 10:18:30,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:18:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2022-03-20 10:18:30,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 10:18:30,308 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:30,308 INFO L499 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1] [2022-03-20 10:18:30,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 10:18:30,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:30,539 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:30,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-03-20 10:18:30,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:30,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521104191] [2022-03-20 10:18:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:30,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:30,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:30,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767883441] [2022-03-20 10:18:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:30,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:30,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:30,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:30,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 10:18:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:30,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 10:18:30,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 10:18:30,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:18:30,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:30,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521104191] [2022-03-20 10:18:30,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:30,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767883441] [2022-03-20 10:18:30,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767883441] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:30,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:30,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 10:18:30,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029629921] [2022-03-20 10:18:30,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:30,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:18:30,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:30,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:18:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:18:30,793 INFO L87 Difference]: Start difference. First operand 132 states and 180 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 10:18:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:30,940 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2022-03-20 10:18:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 10:18:30,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-03-20 10:18:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:30,941 INFO L225 Difference]: With dead ends: 157 [2022-03-20 10:18:30,941 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 10:18:30,942 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-20 10:18:30,942 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 80 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:30,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 269 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:18:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 10:18:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-03-20 10:18:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.3177570093457944) internal successors, (141), 108 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 10:18:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-03-20 10:18:30,952 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 34 [2022-03-20 10:18:30,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:30,953 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-03-20 10:18:30,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 10:18:30,953 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-03-20 10:18:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 10:18:30,953 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:30,953 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:30,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:31,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:31,168 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:31,169 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-03-20 10:18:31,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:31,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015901433] [2022-03-20 10:18:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:31,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:31,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:31,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438295160] [2022-03-20 10:18:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:31,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:31,178 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:31,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 10:18:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:31,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 10:18:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 10:18:31,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:18:31,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:31,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015901433] [2022-03-20 10:18:31,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:31,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438295160] [2022-03-20 10:18:31,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438295160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:18:31,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:18:31,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-20 10:18:31,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408747178] [2022-03-20 10:18:31,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:31,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 10:18:31,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:31,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 10:18:31,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:18:31,522 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:18:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:31,645 INFO L93 Difference]: Finished difference Result 179 states and 241 transitions. [2022-03-20 10:18:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 10:18:31,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-20 10:18:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:31,647 INFO L225 Difference]: With dead ends: 179 [2022-03-20 10:18:31,647 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 10:18:31,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:18:31,647 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 76 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:31,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 409 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:18:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 10:18:31,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-03-20 10:18:31,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.34375) internal successors, (172), 129 states have internal predecessors, (172), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 10:18:31,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2022-03-20 10:18:31,658 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 36 [2022-03-20 10:18:31,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:31,658 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2022-03-20 10:18:31,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:18:31,658 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2022-03-20 10:18:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 10:18:31,659 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:31,659 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2022-03-20 10:18:31,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:31,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 10:18:31,860 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:31,860 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-03-20 10:18:31,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:31,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951995102] [2022-03-20 10:18:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:31,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:31,868 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:31,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413992704] [2022-03-20 10:18:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:31,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:31,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:31,870 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:31,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 10:18:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:31,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:18:31,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:18:31,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:18:31,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951995102] [2022-03-20 10:18:31,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:31,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413992704] [2022-03-20 10:18:31,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413992704] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:31,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:31,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:18:31,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654218016] [2022-03-20 10:18:31,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:31,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:18:31,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:31,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:18:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:18:31,970 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:18:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:31,996 INFO L93 Difference]: Finished difference Result 241 states and 329 transitions. [2022-03-20 10:18:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:18:31,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-20 10:18:31,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:31,997 INFO L225 Difference]: With dead ends: 241 [2022-03-20 10:18:31,997 INFO L226 Difference]: Without dead ends: 174 [2022-03-20 10:18:31,998 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:18:31,998 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:31,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 119 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:31,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-20 10:18:32,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-03-20 10:18:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.3359375) internal successors, (171), 129 states have internal predecessors, (171), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 10:18:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2022-03-20 10:18:32,008 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 36 [2022-03-20 10:18:32,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:32,008 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2022-03-20 10:18:32,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:18:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2022-03-20 10:18:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 10:18:32,008 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:32,008 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1] [2022-03-20 10:18:32,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:32,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 10:18:32,222 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:32,222 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-03-20 10:18:32,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:32,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314382302] [2022-03-20 10:18:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:32,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:32,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:32,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355692987] [2022-03-20 10:18:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:32,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:32,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:32,231 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:32,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 10:18:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:32,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:18:32,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 10:18:32,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:18:32,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:32,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314382302] [2022-03-20 10:18:32,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:32,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355692987] [2022-03-20 10:18:32,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355692987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:32,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:32,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:18:32,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889800493] [2022-03-20 10:18:32,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:32,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:18:32,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:32,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:18:32,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:18:32,386 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:18:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:32,425 INFO L93 Difference]: Finished difference Result 239 states and 335 transitions. [2022-03-20 10:18:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:18:32,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 10:18:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:32,426 INFO L225 Difference]: With dead ends: 239 [2022-03-20 10:18:32,426 INFO L226 Difference]: Without dead ends: 237 [2022-03-20 10:18:32,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:18:32,427 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:32,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-20 10:18:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-03-20 10:18:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 161 states have (on average 1.3664596273291925) internal successors, (220), 162 states have internal predecessors, (220), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 10:18:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 324 transitions. [2022-03-20 10:18:32,440 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 324 transitions. Word has length 39 [2022-03-20 10:18:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:32,440 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 324 transitions. [2022-03-20 10:18:32,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 10:18:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 324 transitions. [2022-03-20 10:18:32,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 10:18:32,440 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:32,441 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-03-20 10:18:32,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:32,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 10:18:32,655 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:32,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-03-20 10:18:32,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:32,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564989705] [2022-03-20 10:18:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:32,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:32,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:32,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600846889] [2022-03-20 10:18:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:32,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:32,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:32,686 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:32,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 10:18:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:32,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 10:18:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:18:32,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:18:33,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:33,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564989705] [2022-03-20 10:18:33,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:33,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600846889] [2022-03-20 10:18:33,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600846889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:18:33,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:18:33,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 10:18:33,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769654877] [2022-03-20 10:18:33,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:33,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:18:33,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:33,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:18:33,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:18:33,021 INFO L87 Difference]: Start difference. First operand 230 states and 324 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 10:18:33,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:33,688 INFO L93 Difference]: Finished difference Result 392 states and 578 transitions. [2022-03-20 10:18:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 10:18:33,689 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-03-20 10:18:33,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:33,690 INFO L225 Difference]: With dead ends: 392 [2022-03-20 10:18:33,690 INFO L226 Difference]: Without dead ends: 390 [2022-03-20 10:18:33,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-20 10:18:33,691 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 170 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:33,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 370 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 10:18:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-20 10:18:33,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 377. [2022-03-20 10:18:33,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 266 states have (on average 1.4248120300751879) internal successors, (379), 267 states have internal predecessors, (379), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-20 10:18:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 563 transitions. [2022-03-20 10:18:33,717 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 563 transitions. Word has length 41 [2022-03-20 10:18:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:33,717 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 563 transitions. [2022-03-20 10:18:33,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 10:18:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 563 transitions. [2022-03-20 10:18:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 10:18:33,717 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:33,717 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1] [2022-03-20 10:18:33,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:33,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 10:18:33,934 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-03-20 10:18:33,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:33,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935785278] [2022-03-20 10:18:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:33,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:33,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:33,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490267717] [2022-03-20 10:18:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:33,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:33,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:33,943 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:33,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 10:18:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:33,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:18:33,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 10:18:34,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:18:34,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935785278] [2022-03-20 10:18:34,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:34,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490267717] [2022-03-20 10:18:34,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490267717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:34,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:34,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:18:34,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877037233] [2022-03-20 10:18:34,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:34,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:18:34,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:34,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:18:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:18:34,072 INFO L87 Difference]: Start difference. First operand 377 states and 563 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 10:18:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:34,139 INFO L93 Difference]: Finished difference Result 566 states and 887 transitions. [2022-03-20 10:18:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:18:34,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-03-20 10:18:34,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:34,142 INFO L225 Difference]: With dead ends: 566 [2022-03-20 10:18:34,142 INFO L226 Difference]: Without dead ends: 564 [2022-03-20 10:18:34,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:18:34,143 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:34,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 172 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-03-20 10:18:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 495. [2022-03-20 10:18:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 307 states have (on average 1.4267100977198697) internal successors, (438), 327 states have internal predecessors, (438), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-03-20 10:18:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 774 transitions. [2022-03-20 10:18:34,181 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 774 transitions. Word has length 44 [2022-03-20 10:18:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:34,182 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 774 transitions. [2022-03-20 10:18:34,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 10:18:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 774 transitions. [2022-03-20 10:18:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 10:18:34,182 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:34,182 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:34,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:34,413 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 10:18:34,413 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:34,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:34,413 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-03-20 10:18:34,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:34,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515402486] [2022-03-20 10:18:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:34,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:34,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:34,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650290907] [2022-03-20 10:18:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:34,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:34,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:34,422 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:34,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 10:18:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:34,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 10:18:34,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 10:18:34,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 10:18:34,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:34,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515402486] [2022-03-20 10:18:34,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:34,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650290907] [2022-03-20 10:18:34,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650290907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:18:34,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:18:34,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 10:18:34,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873712163] [2022-03-20 10:18:34,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:34,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 10:18:34,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:34,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 10:18:34,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 10:18:34,620 INFO L87 Difference]: Start difference. First operand 495 states and 774 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 10:18:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:34,802 INFO L93 Difference]: Finished difference Result 1127 states and 1721 transitions. [2022-03-20 10:18:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 10:18:34,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-20 10:18:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:34,806 INFO L225 Difference]: With dead ends: 1127 [2022-03-20 10:18:34,806 INFO L226 Difference]: Without dead ends: 770 [2022-03-20 10:18:34,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-03-20 10:18:34,808 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 169 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:34,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 342 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:18:34,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-20 10:18:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 736. [2022-03-20 10:18:34,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 471 states have (on average 1.3630573248407643) internal successors, (642), 495 states have internal predecessors, (642), 224 states have call successors, (224), 41 states have call predecessors, (224), 40 states have return successors, (219), 199 states have call predecessors, (219), 219 states have call successors, (219) [2022-03-20 10:18:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1085 transitions. [2022-03-20 10:18:34,875 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1085 transitions. Word has length 42 [2022-03-20 10:18:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:34,875 INFO L478 AbstractCegarLoop]: Abstraction has 736 states and 1085 transitions. [2022-03-20 10:18:34,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 10:18:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1085 transitions. [2022-03-20 10:18:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 10:18:34,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:34,876 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:34,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 10:18:35,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 10:18:35,091 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:35,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:35,092 INFO L85 PathProgramCache]: Analyzing trace with hash 841576990, now seen corresponding path program 1 times [2022-03-20 10:18:35,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:35,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264340892] [2022-03-20 10:18:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:35,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:35,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:35,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329783423] [2022-03-20 10:18:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:35,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:35,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:35,111 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:35,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 10:18:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:35,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 10:18:35,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:18:35,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:18:35,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:35,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264340892] [2022-03-20 10:18:35,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:35,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329783423] [2022-03-20 10:18:35,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329783423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:18:35,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:18:35,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 10:18:35,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542974300] [2022-03-20 10:18:35,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:35,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 10:18:35,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:35,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 10:18:35,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:18:35,340 INFO L87 Difference]: Start difference. First operand 736 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 10:18:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:35,587 INFO L93 Difference]: Finished difference Result 1597 states and 2379 transitions. [2022-03-20 10:18:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 10:18:35,588 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-03-20 10:18:35,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:35,591 INFO L225 Difference]: With dead ends: 1597 [2022-03-20 10:18:35,592 INFO L226 Difference]: Without dead ends: 1119 [2022-03-20 10:18:35,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-03-20 10:18:35,619 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 255 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:35,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 319 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:18:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-03-20 10:18:35,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1072. [2022-03-20 10:18:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 697 states have (on average 1.3113342898134863) internal successors, (914), 730 states have internal predecessors, (914), 318 states have call successors, (318), 57 states have call predecessors, (318), 56 states have return successors, (311), 284 states have call predecessors, (311), 311 states have call successors, (311) [2022-03-20 10:18:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1543 transitions. [2022-03-20 10:18:35,699 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1543 transitions. Word has length 43 [2022-03-20 10:18:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:35,700 INFO L478 AbstractCegarLoop]: Abstraction has 1072 states and 1543 transitions. [2022-03-20 10:18:35,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 10:18:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1543 transitions. [2022-03-20 10:18:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 10:18:35,700 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:35,700 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:35,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 10:18:35,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:35,916 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:35,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:35,916 INFO L85 PathProgramCache]: Analyzing trace with hash -799775801, now seen corresponding path program 2 times [2022-03-20 10:18:35,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:35,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119314629] [2022-03-20 10:18:35,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:35,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:35,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:35,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183056506] [2022-03-20 10:18:35,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:18:35,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:35,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:35,923 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:35,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 10:18:36,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:18:36,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:18:36,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 10:18:36,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 10:18:36,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:18:36,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:36,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119314629] [2022-03-20 10:18:36,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:36,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183056506] [2022-03-20 10:18:36,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183056506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:36,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:36,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:18:36,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751224410] [2022-03-20 10:18:36,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:36,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:18:36,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:18:36,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:18:36,086 INFO L87 Difference]: Start difference. First operand 1072 states and 1543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:18:36,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:36,234 INFO L93 Difference]: Finished difference Result 1700 states and 2539 transitions. [2022-03-20 10:18:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:18:36,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-03-20 10:18:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:36,238 INFO L225 Difference]: With dead ends: 1700 [2022-03-20 10:18:36,238 INFO L226 Difference]: Without dead ends: 1234 [2022-03-20 10:18:36,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 10:18:36,240 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:36,240 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 195 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-03-20 10:18:36,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 995. [2022-03-20 10:18:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 660 states have (on average 1.3015151515151515) internal successors, (859), 690 states have internal predecessors, (859), 278 states have call successors, (278), 57 states have call predecessors, (278), 56 states have return successors, (271), 247 states have call predecessors, (271), 271 states have call successors, (271) [2022-03-20 10:18:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1408 transitions. [2022-03-20 10:18:36,321 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1408 transitions. Word has length 44 [2022-03-20 10:18:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:36,321 INFO L478 AbstractCegarLoop]: Abstraction has 995 states and 1408 transitions. [2022-03-20 10:18:36,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:18:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1408 transitions. [2022-03-20 10:18:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 10:18:36,322 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:36,322 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:36,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:36,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 10:18:36,539 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-03-20 10:18:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:36,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915943463] [2022-03-20 10:18:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:36,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:36,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:36,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23324055] [2022-03-20 10:18:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:36,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:36,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:36,564 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:36,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 10:18:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:36,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 10:18:36,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 10:18:37,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 10:18:37,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:37,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915943463] [2022-03-20 10:18:37,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:37,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23324055] [2022-03-20 10:18:37,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23324055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:18:37,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:18:37,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 10:18:37,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198464318] [2022-03-20 10:18:37,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:37,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 10:18:37,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:37,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 10:18:37,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 10:18:37,697 INFO L87 Difference]: Start difference. First operand 995 states and 1408 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-20 10:18:43,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:43,306 INFO L93 Difference]: Finished difference Result 1412 states and 2014 transitions. [2022-03-20 10:18:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 10:18:43,306 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-03-20 10:18:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:43,314 INFO L225 Difference]: With dead ends: 1412 [2022-03-20 10:18:43,314 INFO L226 Difference]: Without dead ends: 1404 [2022-03-20 10:18:43,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 10:18:43,315 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 186 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:43,315 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 676 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-20 10:18:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-03-20 10:18:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1226. [2022-03-20 10:18:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 845 states have (on average 1.2970414201183431) internal successors, (1096), 864 states have internal predecessors, (1096), 308 states have call successors, (308), 73 states have call predecessors, (308), 72 states have return successors, (303), 288 states have call predecessors, (303), 303 states have call successors, (303) [2022-03-20 10:18:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1707 transitions. [2022-03-20 10:18:43,493 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1707 transitions. Word has length 58 [2022-03-20 10:18:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:43,494 INFO L478 AbstractCegarLoop]: Abstraction has 1226 states and 1707 transitions. [2022-03-20 10:18:43,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-20 10:18:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1707 transitions. [2022-03-20 10:18:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 10:18:43,494 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:43,494 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-03-20 10:18:43,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 10:18:43,721 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 10:18:43,721 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:43,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:43,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2022-03-20 10:18:43,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:43,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863645197] [2022-03-20 10:18:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:43,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:43,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:43,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110502813] [2022-03-20 10:18:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:43,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:43,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:43,732 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:43,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 10:18:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:43,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 10:18:43,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 10:18:43,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 10:18:44,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:44,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863645197] [2022-03-20 10:18:44,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:44,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110502813] [2022-03-20 10:18:44,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110502813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:18:44,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:18:44,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 10:18:44,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8300233] [2022-03-20 10:18:44,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:44,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 10:18:44,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:44,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 10:18:44,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 10:18:44,085 INFO L87 Difference]: Start difference. First operand 1226 states and 1707 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 10:18:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:44,680 INFO L93 Difference]: Finished difference Result 2565 states and 3679 transitions. [2022-03-20 10:18:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 10:18:44,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 64 [2022-03-20 10:18:44,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:44,689 INFO L225 Difference]: With dead ends: 2565 [2022-03-20 10:18:44,689 INFO L226 Difference]: Without dead ends: 2543 [2022-03-20 10:18:44,690 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-03-20 10:18:44,690 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 385 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:44,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 488 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 10:18:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-03-20 10:18:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2406. [2022-03-20 10:18:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1658 states have (on average 1.3094089264173703) internal successors, (2171), 1717 states have internal predecessors, (2171), 631 states have call successors, (631), 117 states have call predecessors, (631), 116 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-03-20 10:18:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3425 transitions. [2022-03-20 10:18:45,005 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3425 transitions. Word has length 64 [2022-03-20 10:18:45,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:45,005 INFO L478 AbstractCegarLoop]: Abstraction has 2406 states and 3425 transitions. [2022-03-20 10:18:45,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 10:18:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3425 transitions. [2022-03-20 10:18:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 10:18:45,006 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:45,006 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:45,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:45,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 10:18:45,233 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:45,233 INFO L85 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2022-03-20 10:18:45,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:45,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144013229] [2022-03-20 10:18:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:45,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:45,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:45,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630941241] [2022-03-20 10:18:45,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:45,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:45,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:45,250 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:45,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 10:18:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:45,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 10:18:45,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 10:18:45,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-20 10:18:45,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:45,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144013229] [2022-03-20 10:18:45,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:45,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630941241] [2022-03-20 10:18:45,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630941241] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 10:18:45,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:18:45,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 10:18:45,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430050664] [2022-03-20 10:18:45,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:45,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:18:45,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:45,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:18:45,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 10:18:45,619 INFO L87 Difference]: Start difference. First operand 2406 states and 3425 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 10:18:45,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:45,966 INFO L93 Difference]: Finished difference Result 2467 states and 3485 transitions. [2022-03-20 10:18:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:18:45,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-20 10:18:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:45,987 INFO L225 Difference]: With dead ends: 2467 [2022-03-20 10:18:45,987 INFO L226 Difference]: Without dead ends: 2465 [2022-03-20 10:18:45,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 10:18:45,989 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:45,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-03-20 10:18:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2442. [2022-03-20 10:18:46,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 1685 states have (on average 1.3032640949554897) internal successors, (2196), 1744 states have internal predecessors, (2196), 631 states have call successors, (631), 126 states have call predecessors, (631), 125 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-03-20 10:18:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3450 transitions. [2022-03-20 10:18:46,293 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3450 transitions. Word has length 67 [2022-03-20 10:18:46,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:46,293 INFO L478 AbstractCegarLoop]: Abstraction has 2442 states and 3450 transitions. [2022-03-20 10:18:46,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 10:18:46,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3450 transitions. [2022-03-20 10:18:46,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 10:18:46,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:46,294 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:46,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:46,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:46,516 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1422612783, now seen corresponding path program 1 times [2022-03-20 10:18:46,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:46,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528733761] [2022-03-20 10:18:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:46,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:46,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:46,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025565672] [2022-03-20 10:18:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:46,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:46,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:46,526 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:46,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 10:18:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:18:46,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 10:18:46,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-20 10:18:46,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:18:46,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:46,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528733761] [2022-03-20 10:18:46,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:46,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025565672] [2022-03-20 10:18:46,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025565672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:18:46,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:18:46,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:18:46,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289830552] [2022-03-20 10:18:46,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:18:46,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:18:46,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:46,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:18:46,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:18:46,682 INFO L87 Difference]: Start difference. First operand 2442 states and 3450 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 10:18:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:18:47,025 INFO L93 Difference]: Finished difference Result 4377 states and 6175 transitions. [2022-03-20 10:18:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:18:47,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-03-20 10:18:47,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:18:47,034 INFO L225 Difference]: With dead ends: 4377 [2022-03-20 10:18:47,034 INFO L226 Difference]: Without dead ends: 2578 [2022-03-20 10:18:47,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:18:47,038 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:18:47,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 127 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:18:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-03-20 10:18:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2372. [2022-03-20 10:18:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1689 states have (on average 1.2948490230905862) internal successors, (2187), 1720 states have internal predecessors, (2187), 559 states have call successors, (559), 124 states have call predecessors, (559), 123 states have return successors, (551), 527 states have call predecessors, (551), 551 states have call successors, (551) [2022-03-20 10:18:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3297 transitions. [2022-03-20 10:18:47,339 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3297 transitions. Word has length 73 [2022-03-20 10:18:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:18:47,339 INFO L478 AbstractCegarLoop]: Abstraction has 2372 states and 3297 transitions. [2022-03-20 10:18:47,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 10:18:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3297 transitions. [2022-03-20 10:18:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 10:18:47,340 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:18:47,340 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:18:47,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 10:18:47,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:47,558 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:18:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:18:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 2 times [2022-03-20 10:18:47,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:18:47,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919523988] [2022-03-20 10:18:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:18:47,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:18:47,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:18:47,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142921287] [2022-03-20 10:18:47,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:18:47,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:18:47,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:18:47,576 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:18:47,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 10:18:47,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:18:47,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:18:47,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 10:18:47,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:18:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 10:18:48,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:18:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-20 10:18:49,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:18:49,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919523988] [2022-03-20 10:18:49,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:18:49,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142921287] [2022-03-20 10:18:49,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142921287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:18:49,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:18:49,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-03-20 10:18:49,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241653677] [2022-03-20 10:18:49,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:18:49,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 10:18:49,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:18:49,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 10:18:49,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-03-20 10:18:49,746 INFO L87 Difference]: Start difference. First operand 2372 states and 3297 transitions. Second operand has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 10:18:58,679 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:19:00,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:19:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:19:05,368 INFO L93 Difference]: Finished difference Result 2869 states and 3894 transitions. [2022-03-20 10:19:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 10:19:05,368 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 75 [2022-03-20 10:19:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:19:05,376 INFO L225 Difference]: With dead ends: 2869 [2022-03-20 10:19:05,376 INFO L226 Difference]: Without dead ends: 2863 [2022-03-20 10:19:05,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 10:19:05,377 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 297 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 303 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-03-20 10:19:05,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 848 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1024 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2022-03-20 10:19:05,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-03-20 10:19:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2736. [2022-03-20 10:19:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1985 states have (on average 1.2916876574307306) internal successors, (2564), 2026 states have internal predecessors, (2564), 594 states have call successors, (594), 158 states have call predecessors, (594), 156 states have return successors, (587), 551 states have call predecessors, (587), 587 states have call successors, (587) [2022-03-20 10:19:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 3745 transitions. [2022-03-20 10:19:05,711 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 3745 transitions. Word has length 75 [2022-03-20 10:19:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:19:05,711 INFO L478 AbstractCegarLoop]: Abstraction has 2736 states and 3745 transitions. [2022-03-20 10:19:05,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 10:19:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 3745 transitions. [2022-03-20 10:19:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 10:19:05,712 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:19:05,712 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:19:05,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 10:19:05,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 10:19:05,928 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:19:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:19:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 1 times [2022-03-20 10:19:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:19:05,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017130184] [2022-03-20 10:19:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:19:05,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:19:05,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:19:05,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392407218] [2022-03-20 10:19:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:19:05,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:19:05,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:19:05,939 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:19:05,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 10:19:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:19:05,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 10:19:05,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:19:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-20 10:19:07,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:19:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 10:19:11,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:19:11,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017130184] [2022-03-20 10:19:11,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:19:11,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392407218] [2022-03-20 10:19:11,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392407218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:19:11,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:19:11,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-03-20 10:19:11,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836394041] [2022-03-20 10:19:11,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:19:11,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 10:19:11,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:19:11,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 10:19:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-03-20 10:19:11,522 INFO L87 Difference]: Start difference. First operand 2736 states and 3745 transitions. Second operand has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 10:19:21,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:19:25,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:19:36,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:19:49,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:19:56,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:19:58,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:20:01,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:20:03,388 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:20:12,705 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:20:19,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:19,666 INFO L93 Difference]: Finished difference Result 3504 states and 4783 transitions. [2022-03-20 10:20:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 10:20:19,666 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 88 [2022-03-20 10:20:19,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:19,676 INFO L225 Difference]: With dead ends: 3504 [2022-03-20 10:20:19,676 INFO L226 Difference]: Without dead ends: 3473 [2022-03-20 10:20:19,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3885 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=1957, Invalid=9599, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 10:20:19,679 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 416 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 534 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 2092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.7s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:19,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 1232 Invalid, 2092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 1552 Invalid, 6 Unknown, 0 Unchecked, 28.7s Time] [2022-03-20 10:20:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3473 states. [2022-03-20 10:20:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3473 to 3094. [2022-03-20 10:20:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3094 states, 2229 states have (on average 1.2960969044414536) internal successors, (2889), 2276 states have internal predecessors, (2889), 689 states have call successors, (689), 177 states have call predecessors, (689), 175 states have return successors, (682), 640 states have call predecessors, (682), 682 states have call successors, (682) [2022-03-20 10:20:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3094 states to 3094 states and 4260 transitions. [2022-03-20 10:20:20,254 INFO L78 Accepts]: Start accepts. Automaton has 3094 states and 4260 transitions. Word has length 88 [2022-03-20 10:20:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:20,254 INFO L478 AbstractCegarLoop]: Abstraction has 3094 states and 4260 transitions. [2022-03-20 10:20:20,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 10:20:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3094 states and 4260 transitions. [2022-03-20 10:20:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 10:20:20,256 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:20,256 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:20,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:20,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 10:20:20,471 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:20,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:20,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 3 times [2022-03-20 10:20:20,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:20,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959287867] [2022-03-20 10:20:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:20,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:20,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:20,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653174369] [2022-03-20 10:20:20,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 10:20:20,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:20,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:20,480 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:20,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 10:20:20,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 10:20:20,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:20:20,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 10:20:20,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-20 10:20:21,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-20 10:20:21,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:21,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959287867] [2022-03-20 10:20:21,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:21,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653174369] [2022-03-20 10:20:21,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653174369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:20:21,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:20:21,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 10:20:21,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149805096] [2022-03-20 10:20:21,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:20:21,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 10:20:21,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:21,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 10:20:21,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-20 10:20:21,342 INFO L87 Difference]: Start difference. First operand 3094 states and 4260 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 10:20:23,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:20:25,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:20:30,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:20:32,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:20:33,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:20:34,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:34,492 INFO L93 Difference]: Finished difference Result 3393 states and 4631 transitions. [2022-03-20 10:20:34,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 10:20:34,492 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 97 [2022-03-20 10:20:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:34,501 INFO L225 Difference]: With dead ends: 3393 [2022-03-20 10:20:34,501 INFO L226 Difference]: Without dead ends: 3389 [2022-03-20 10:20:34,502 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2022-03-20 10:20:34,503 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 112 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 133 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:34,503 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 639 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 484 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2022-03-20 10:20:34,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3389 states. [2022-03-20 10:20:35,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3389 to 3296. [2022-03-20 10:20:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3296 states, 2387 states have (on average 1.294093003770423) internal successors, (3089), 2435 states have internal predecessors, (3089), 714 states have call successors, (714), 196 states have call predecessors, (714), 194 states have return successors, (708), 664 states have call predecessors, (708), 708 states have call successors, (708) [2022-03-20 10:20:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 4511 transitions. [2022-03-20 10:20:35,092 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 4511 transitions. Word has length 97 [2022-03-20 10:20:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:35,092 INFO L478 AbstractCegarLoop]: Abstraction has 3296 states and 4511 transitions. [2022-03-20 10:20:35,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 10:20:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 4511 transitions. [2022-03-20 10:20:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 10:20:35,093 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:35,093 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:35,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:35,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:35,307 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:35,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1037830812, now seen corresponding path program 1 times [2022-03-20 10:20:35,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:35,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673372317] [2022-03-20 10:20:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:35,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:35,313 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:35,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512789340] [2022-03-20 10:20:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:35,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:35,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:35,328 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:35,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 10:20:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:35,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 10:20:35,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 10:20:35,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 10:20:35,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:35,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673372317] [2022-03-20 10:20:35,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:35,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512789340] [2022-03-20 10:20:35,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512789340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:20:35,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:20:35,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 10:20:35,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171906094] [2022-03-20 10:20:35,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:20:35,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 10:20:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:35,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 10:20:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 10:20:35,840 INFO L87 Difference]: Start difference. First operand 3296 states and 4511 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 10:20:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:37,619 INFO L93 Difference]: Finished difference Result 7557 states and 10866 transitions. [2022-03-20 10:20:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 10:20:37,622 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 98 [2022-03-20 10:20:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:37,644 INFO L225 Difference]: With dead ends: 7557 [2022-03-20 10:20:37,644 INFO L226 Difference]: Without dead ends: 6304 [2022-03-20 10:20:37,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 10:20:37,647 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 676 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:37,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 700 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 10:20:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2022-03-20 10:20:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 6062. [2022-03-20 10:20:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6062 states, 4100 states have (on average 1.2858536585365854) internal successors, (5272), 4137 states have internal predecessors, (5272), 1609 states have call successors, (1609), 354 states have call predecessors, (1609), 352 states have return successors, (1597), 1570 states have call predecessors, (1597), 1597 states have call successors, (1597) [2022-03-20 10:20:38,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6062 states to 6062 states and 8478 transitions. [2022-03-20 10:20:38,904 INFO L78 Accepts]: Start accepts. Automaton has 6062 states and 8478 transitions. Word has length 98 [2022-03-20 10:20:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:38,904 INFO L478 AbstractCegarLoop]: Abstraction has 6062 states and 8478 transitions. [2022-03-20 10:20:38,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 10:20:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 6062 states and 8478 transitions. [2022-03-20 10:20:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 10:20:38,906 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:38,912 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:38,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:39,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:39,132 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:39,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:39,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2067527905, now seen corresponding path program 2 times [2022-03-20 10:20:39,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:39,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114822187] [2022-03-20 10:20:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:39,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:39,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:39,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948790874] [2022-03-20 10:20:39,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:20:39,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:39,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:39,160 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:39,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 10:20:39,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:20:39,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:20:39,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 10:20:39,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-20 10:20:40,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 10:20:40,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:40,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114822187] [2022-03-20 10:20:40,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:40,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948790874] [2022-03-20 10:20:40,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948790874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:20:40,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:20:40,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-20 10:20:40,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140043001] [2022-03-20 10:20:40,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:20:40,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 10:20:40,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:40,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 10:20:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-20 10:20:40,874 INFO L87 Difference]: Start difference. First operand 6062 states and 8478 transitions. Second operand has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 10:20:43,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:20:48,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:20:50,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:20:52,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:52,098 INFO L93 Difference]: Finished difference Result 7137 states and 9937 transitions. [2022-03-20 10:20:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 10:20:52,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 108 [2022-03-20 10:20:52,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:52,138 INFO L225 Difference]: With dead ends: 7137 [2022-03-20 10:20:52,138 INFO L226 Difference]: Without dead ends: 7081 [2022-03-20 10:20:52,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 10:20:52,140 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 217 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 327 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:52,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 960 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 1252 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2022-03-20 10:20:52,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2022-03-20 10:20:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 6443. [2022-03-20 10:20:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6443 states, 4301 states have (on average 1.2922576145082538) internal successors, (5558), 4338 states have internal predecessors, (5558), 1764 states have call successors, (1764), 378 states have call predecessors, (1764), 377 states have return successors, (1753), 1726 states have call predecessors, (1753), 1753 states have call successors, (1753) [2022-03-20 10:20:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6443 states to 6443 states and 9075 transitions. [2022-03-20 10:20:53,607 INFO L78 Accepts]: Start accepts. Automaton has 6443 states and 9075 transitions. Word has length 108 [2022-03-20 10:20:53,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:53,607 INFO L478 AbstractCegarLoop]: Abstraction has 6443 states and 9075 transitions. [2022-03-20 10:20:53,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 10:20:53,608 INFO L276 IsEmpty]: Start isEmpty. Operand 6443 states and 9075 transitions. [2022-03-20 10:20:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 10:20:53,610 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:53,610 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:53,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:53,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 10:20:53,824 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:53,824 INFO L85 PathProgramCache]: Analyzing trace with hash -55503749, now seen corresponding path program 1 times [2022-03-20 10:20:53,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:53,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368107733] [2022-03-20 10:20:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:53,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:53,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:53,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087044961] [2022-03-20 10:20:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:53,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:53,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:53,846 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:53,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 10:20:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:20:53,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 10:20:53,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 10:20:54,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 10:20:54,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:54,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368107733] [2022-03-20 10:20:54,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:54,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087044961] [2022-03-20 10:20:54,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087044961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:20:54,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:20:54,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-20 10:20:54,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126974879] [2022-03-20 10:20:54,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:20:54,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 10:20:54,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:54,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 10:20:54,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 10:20:54,391 INFO L87 Difference]: Start difference. First operand 6443 states and 9075 transitions. Second operand has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 10:20:56,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:20:56,333 INFO L93 Difference]: Finished difference Result 10058 states and 14253 transitions. [2022-03-20 10:20:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 10:20:56,333 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 105 [2022-03-20 10:20:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:20:56,349 INFO L225 Difference]: With dead ends: 10058 [2022-03-20 10:20:56,349 INFO L226 Difference]: Without dead ends: 6342 [2022-03-20 10:20:56,355 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 10:20:56,356 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 601 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 10:20:56,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 540 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 10:20:56,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2022-03-20 10:20:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 6288. [2022-03-20 10:20:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6288 states, 4192 states have (on average 1.2068225190839694) internal successors, (5059), 4218 states have internal predecessors, (5059), 1718 states have call successors, (1718), 378 states have call predecessors, (1718), 377 states have return successors, (1707), 1691 states have call predecessors, (1707), 1707 states have call successors, (1707) [2022-03-20 10:20:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6288 states to 6288 states and 8484 transitions. [2022-03-20 10:20:57,829 INFO L78 Accepts]: Start accepts. Automaton has 6288 states and 8484 transitions. Word has length 105 [2022-03-20 10:20:57,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:20:57,830 INFO L478 AbstractCegarLoop]: Abstraction has 6288 states and 8484 transitions. [2022-03-20 10:20:57,830 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-20 10:20:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 6288 states and 8484 transitions. [2022-03-20 10:20:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 10:20:57,832 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:20:57,832 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:20:57,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 10:20:58,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 10:20:58,047 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:20:58,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:20:58,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1765875055, now seen corresponding path program 2 times [2022-03-20 10:20:58,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:20:58,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104363413] [2022-03-20 10:20:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:20:58,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:20:58,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:20:58,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313805248] [2022-03-20 10:20:58,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:20:58,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:20:58,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:20:58,059 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:20:58,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 10:20:58,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:20:58,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:20:58,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 10:20:58,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:20:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 10:20:58,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:20:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 10:20:58,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:20:58,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104363413] [2022-03-20 10:20:58,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:20:58,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313805248] [2022-03-20 10:20:58,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313805248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:20:58,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:20:58,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-20 10:20:58,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096316789] [2022-03-20 10:20:58,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:20:58,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 10:20:58,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:20:58,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 10:20:58,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 10:20:58,712 INFO L87 Difference]: Start difference. First operand 6288 states and 8484 transitions. Second operand has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 9 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (30), 7 states have call predecessors, (30), 8 states have call successors, (30) [2022-03-20 10:21:00,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:21:00,692 INFO L93 Difference]: Finished difference Result 6382 states and 8576 transitions. [2022-03-20 10:21:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 10:21:00,693 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 9 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (30), 7 states have call predecessors, (30), 8 states have call successors, (30) Word has length 132 [2022-03-20 10:21:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:21:00,721 INFO L225 Difference]: With dead ends: 6382 [2022-03-20 10:21:00,721 INFO L226 Difference]: Without dead ends: 6350 [2022-03-20 10:21:00,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=592, Invalid=1048, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 10:21:00,722 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 522 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 10:21:00,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 680 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 10:21:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6350 states. [2022-03-20 10:21:02,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6350 to 6332. [2022-03-20 10:21:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6332 states, 4236 states have (on average 1.1952313503305005) internal successors, (5063), 4262 states have internal predecessors, (5063), 1718 states have call successors, (1718), 378 states have call predecessors, (1718), 377 states have return successors, (1707), 1691 states have call predecessors, (1707), 1707 states have call successors, (1707) [2022-03-20 10:21:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6332 states to 6332 states and 8488 transitions. [2022-03-20 10:21:02,102 INFO L78 Accepts]: Start accepts. Automaton has 6332 states and 8488 transitions. Word has length 132 [2022-03-20 10:21:02,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:21:02,102 INFO L478 AbstractCegarLoop]: Abstraction has 6332 states and 8488 transitions. [2022-03-20 10:21:02,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 9 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (30), 7 states have call predecessors, (30), 8 states have call successors, (30) [2022-03-20 10:21:02,102 INFO L276 IsEmpty]: Start isEmpty. Operand 6332 states and 8488 transitions. [2022-03-20 10:21:02,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 10:21:02,105 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:21:02,105 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:21:02,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 10:21:02,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 10:21:02,321 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:21:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:21:02,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1118265052, now seen corresponding path program 3 times [2022-03-20 10:21:02,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:21:02,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817419267] [2022-03-20 10:21:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:02,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:21:02,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:21:02,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583534813] [2022-03-20 10:21:02,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 10:21:02,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:02,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:21:02,343 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:21:02,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 10:21:02,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 10:21:02,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:21:02,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 10:21:02,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:21:03,448 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 10:21:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 90 proven. 51 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-03-20 10:21:03,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:21:10,313 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 10:21:20,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:21:20,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817419267] [2022-03-20 10:21:20,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:21:20,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583534813] [2022-03-20 10:21:20,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583534813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 10:21:20,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:21:20,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 10:21:20,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739400806] [2022-03-20 10:21:20,896 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 10:21:20,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 10:21:20,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:21:20,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 10:21:20,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=466, Unknown=7, NotChecked=0, Total=552 [2022-03-20 10:21:20,897 INFO L87 Difference]: Start difference. First operand 6332 states and 8488 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 10:21:32,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:21:37,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:21:39,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:21:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:21:40,697 INFO L93 Difference]: Finished difference Result 7159 states and 9563 transitions. [2022-03-20 10:21:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 10:21:40,698 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 138 [2022-03-20 10:21:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:21:40,711 INFO L225 Difference]: With dead ends: 7159 [2022-03-20 10:21:40,711 INFO L226 Difference]: Without dead ends: 7107 [2022-03-20 10:21:40,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=167, Invalid=945, Unknown=10, NotChecked=0, Total=1122 [2022-03-20 10:21:40,713 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 104 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 98 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:21:40,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 842 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 831 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-03-20 10:21:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7107 states. [2022-03-20 10:21:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7107 to 6960. [2022-03-20 10:21:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6960 states, 4647 states have (on average 1.195610071013557) internal successors, (5556), 4673 states have internal predecessors, (5556), 1903 states have call successors, (1903), 410 states have call predecessors, (1903), 409 states have return successors, (1893), 1876 states have call predecessors, (1893), 1893 states have call successors, (1893) [2022-03-20 10:21:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6960 states to 6960 states and 9352 transitions. [2022-03-20 10:21:42,236 INFO L78 Accepts]: Start accepts. Automaton has 6960 states and 9352 transitions. Word has length 138 [2022-03-20 10:21:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:21:42,236 INFO L478 AbstractCegarLoop]: Abstraction has 6960 states and 9352 transitions. [2022-03-20 10:21:42,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 10:21:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 6960 states and 9352 transitions. [2022-03-20 10:21:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 10:21:42,239 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:21:42,239 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:21:42,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 10:21:42,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 10:21:42,454 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:21:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:21:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1010003828, now seen corresponding path program 1 times [2022-03-20 10:21:42,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:21:42,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656216185] [2022-03-20 10:21:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:42,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:21:42,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:21:42,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901404740] [2022-03-20 10:21:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:42,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:42,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:21:42,463 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:21:42,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 10:21:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:21:42,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 10:21:42,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:21:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 82 proven. 32 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2022-03-20 10:21:42,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:21:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 87 proven. 17 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2022-03-20 10:21:43,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:21:43,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656216185] [2022-03-20 10:21:43,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:21:43,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901404740] [2022-03-20 10:21:43,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901404740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:21:43,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:21:43,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2022-03-20 10:21:43,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539231159] [2022-03-20 10:21:43,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:21:43,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 10:21:43,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:21:43,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 10:21:43,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-20 10:21:43,166 INFO L87 Difference]: Start difference. First operand 6960 states and 9352 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 8 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2022-03-20 10:21:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:21:46,279 INFO L93 Difference]: Finished difference Result 8625 states and 11591 transitions. [2022-03-20 10:21:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 10:21:46,280 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 8 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) Word has length 146 [2022-03-20 10:21:46,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:21:46,294 INFO L225 Difference]: With dead ends: 8625 [2022-03-20 10:21:46,294 INFO L226 Difference]: Without dead ends: 8605 [2022-03-20 10:21:46,296 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 285 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-03-20 10:21:46,296 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 71 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 10:21:46,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 571 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 10:21:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2022-03-20 10:21:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 6962. [2022-03-20 10:21:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 4686 states have (on average 1.1886470337174562) internal successors, (5570), 4703 states have internal predecessors, (5570), 1839 states have call successors, (1839), 438 states have call predecessors, (1839), 436 states have return successors, (1837), 1820 states have call predecessors, (1837), 1837 states have call successors, (1837) [2022-03-20 10:21:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 9246 transitions. [2022-03-20 10:21:47,912 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 9246 transitions. Word has length 146 [2022-03-20 10:21:47,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:21:47,912 INFO L478 AbstractCegarLoop]: Abstraction has 6962 states and 9246 transitions. [2022-03-20 10:21:47,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 8 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2022-03-20 10:21:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 9246 transitions. [2022-03-20 10:21:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 10:21:47,915 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:21:47,916 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:21:47,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 10:21:48,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 10:21:48,136 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:21:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:21:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1657425713, now seen corresponding path program 4 times [2022-03-20 10:21:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:21:48,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275819218] [2022-03-20 10:21:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:48,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:21:48,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:21:48,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647792773] [2022-03-20 10:21:48,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 10:21:48,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:48,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:21:48,143 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:21:48,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 10:21:48,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 10:21:48,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:21:48,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 10:21:48,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:21:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 95 proven. 148 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-03-20 10:21:49,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:21:49,959 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 10:21:54,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:21:54,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275819218] [2022-03-20 10:21:54,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:21:54,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647792773] [2022-03-20 10:21:54,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647792773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 10:21:54,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:21:54,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 10:21:54,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488812187] [2022-03-20 10:21:54,478 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 10:21:54,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 10:21:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:21:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 10:21:54,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-03-20 10:21:54,479 INFO L87 Difference]: Start difference. First operand 6962 states and 9246 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 10:21:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:21:57,877 INFO L93 Difference]: Finished difference Result 7506 states and 9922 transitions. [2022-03-20 10:21:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 10:21:57,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 145 [2022-03-20 10:21:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:21:57,917 INFO L225 Difference]: With dead ends: 7506 [2022-03-20 10:21:57,917 INFO L226 Difference]: Without dead ends: 7501 [2022-03-20 10:21:57,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 10:21:57,919 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 129 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:21:57,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1674 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1731 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 10:21:57,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2022-03-20 10:21:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 7222. [2022-03-20 10:21:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7222 states, 4848 states have (on average 1.1877062706270627) internal successors, (5758), 4865 states have internal predecessors, (5758), 1911 states have call successors, (1911), 464 states have call predecessors, (1911), 462 states have return successors, (1909), 1892 states have call predecessors, (1909), 1909 states have call successors, (1909) [2022-03-20 10:21:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7222 states to 7222 states and 9578 transitions. [2022-03-20 10:21:59,687 INFO L78 Accepts]: Start accepts. Automaton has 7222 states and 9578 transitions. Word has length 145 [2022-03-20 10:21:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:21:59,687 INFO L478 AbstractCegarLoop]: Abstraction has 7222 states and 9578 transitions. [2022-03-20 10:21:59,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 10:21:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7222 states and 9578 transitions. [2022-03-20 10:21:59,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 10:21:59,691 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:21:59,691 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:21:59,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-20 10:21:59,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:59,908 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:21:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:21:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1291712014, now seen corresponding path program 5 times [2022-03-20 10:21:59,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:21:59,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713775371] [2022-03-20 10:21:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:21:59,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:21:59,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:21:59,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103971058] [2022-03-20 10:21:59,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 10:21:59,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:21:59,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:21:59,915 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:21:59,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 10:22:00,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-20 10:22:00,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:22:00,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-20 10:22:00,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:22:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 77 proven. 170 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2022-03-20 10:22:01,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:22:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 128 proven. 115 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-03-20 10:22:07,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:22:07,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713775371] [2022-03-20 10:22:07,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:22:07,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103971058] [2022-03-20 10:22:07,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103971058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:22:07,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:22:07,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2022-03-20 10:22:07,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104282039] [2022-03-20 10:22:07,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:22:07,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 10:22:07,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:22:07,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 10:22:07,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 10:22:07,835 INFO L87 Difference]: Start difference. First operand 7222 states and 9578 transitions. Second operand has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-03-20 10:22:19,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:22:23,579 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:22:26,577 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:22:27,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:22:42,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:22:48,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:22:51,177 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:22:56,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:23:01,728 WARN L232 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 104 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:23:06,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:23:25,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:23:29,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:23:32,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:23:37,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:23:39,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:23:52,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:24:03,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:24:17,734 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:24:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:24:29,427 INFO L93 Difference]: Finished difference Result 9970 states and 13562 transitions. [2022-03-20 10:24:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 10:24:29,427 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) Word has length 161 [2022-03-20 10:24:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:24:29,455 INFO L225 Difference]: With dead ends: 9970 [2022-03-20 10:24:29,455 INFO L226 Difference]: Without dead ends: 9964 [2022-03-20 10:24:29,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 333 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4036 ImplicationChecksByTransitivity, 76.3s TimeCoverageRelationStatistics Valid=2343, Invalid=10767, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 10:24:29,459 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 509 mSDsluCounter, 1973 mSDsCounter, 0 mSdLazyCounter, 3272 mSolverCounterSat, 899 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 2101 SdHoareTripleChecker+Invalid, 4184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 899 IncrementalHoareTripleChecker+Valid, 3272 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:24:29,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 2101 Invalid, 4184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [899 Valid, 3272 Invalid, 13 Unknown, 0 Unchecked, 67.0s Time] [2022-03-20 10:24:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9964 states. [2022-03-20 10:24:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9964 to 8449. [2022-03-20 10:24:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8449 states, 5602 states have (on average 1.203498750446269) internal successors, (6742), 5621 states have internal predecessors, (6742), 2331 states have call successors, (2331), 517 states have call predecessors, (2331), 515 states have return successors, (2329), 2310 states have call predecessors, (2329), 2329 states have call successors, (2329) [2022-03-20 10:24:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8449 states to 8449 states and 11402 transitions. [2022-03-20 10:24:32,493 INFO L78 Accepts]: Start accepts. Automaton has 8449 states and 11402 transitions. Word has length 161 [2022-03-20 10:24:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:24:32,493 INFO L478 AbstractCegarLoop]: Abstraction has 8449 states and 11402 transitions. [2022-03-20 10:24:32,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-03-20 10:24:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 8449 states and 11402 transitions. [2022-03-20 10:24:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 10:24:32,498 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:24:32,498 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:24:32,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 10:24:32,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 10:24:32,703 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:24:32,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:24:32,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2087386651, now seen corresponding path program 6 times [2022-03-20 10:24:32,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:24:32,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850542172] [2022-03-20 10:24:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:24:32,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:24:32,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:24:32,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226523553] [2022-03-20 10:24:32,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 10:24:32,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:24:32,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:24:32,714 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:24:32,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 10:24:32,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 10:24:32,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:24:32,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 10:24:32,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:24:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 368 proven. 21 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-03-20 10:24:33,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:24:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 120 proven. 21 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-03-20 10:24:33,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:24:33,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850542172] [2022-03-20 10:24:33,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:24:33,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226523553] [2022-03-20 10:24:33,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226523553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:24:33,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:24:33,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-20 10:24:33,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784903980] [2022-03-20 10:24:33,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:24:33,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 10:24:33,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:24:33,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 10:24:33,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 10:24:33,266 INFO L87 Difference]: Start difference. First operand 8449 states and 11402 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-03-20 10:24:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:24:36,982 INFO L93 Difference]: Finished difference Result 15540 states and 21199 transitions. [2022-03-20 10:24:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 10:24:36,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 165 [2022-03-20 10:24:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:24:36,998 INFO L225 Difference]: With dead ends: 15540 [2022-03-20 10:24:36,998 INFO L226 Difference]: Without dead ends: 10276 [2022-03-20 10:24:37,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 10:24:37,010 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 28 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:24:37,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 333 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:24:37,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10276 states. [2022-03-20 10:24:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10276 to 9595. [2022-03-20 10:24:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9595 states, 6408 states have (on average 1.211298377028714) internal successors, (7762), 6472 states have internal predecessors, (7762), 2696 states have call successors, (2696), 492 states have call predecessors, (2696), 490 states have return successors, (2694), 2630 states have call predecessors, (2694), 2694 states have call successors, (2694) [2022-03-20 10:24:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9595 states to 9595 states and 13152 transitions. [2022-03-20 10:24:40,556 INFO L78 Accepts]: Start accepts. Automaton has 9595 states and 13152 transitions. Word has length 165 [2022-03-20 10:24:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:24:40,557 INFO L478 AbstractCegarLoop]: Abstraction has 9595 states and 13152 transitions. [2022-03-20 10:24:40,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-03-20 10:24:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 9595 states and 13152 transitions. [2022-03-20 10:24:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-20 10:24:40,576 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:24:40,576 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:24:40,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 10:24:40,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:24:40,777 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:24:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:24:40,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1604879327, now seen corresponding path program 7 times [2022-03-20 10:24:40,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:24:40,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259903050] [2022-03-20 10:24:40,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:24:40,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:24:40,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:24:40,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670306865] [2022-03-20 10:24:40,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 10:24:40,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:24:40,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:24:40,787 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:24:40,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 10:24:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:24:40,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-20 10:24:40,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:24:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 183 proven. 171 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2022-03-20 10:24:42,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:24:42,867 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 10:24:47,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:24:47,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259903050] [2022-03-20 10:24:47,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:24:47,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670306865] [2022-03-20 10:24:47,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670306865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 10:24:47,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:24:47,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 10:24:47,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280472533] [2022-03-20 10:24:47,586 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 10:24:47,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 10:24:47,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:24:47,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 10:24:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-03-20 10:24:47,587 INFO L87 Difference]: Start difference. First operand 9595 states and 13152 transitions. Second operand has 23 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-20 10:24:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:24:53,133 INFO L93 Difference]: Finished difference Result 9926 states and 13549 transitions. [2022-03-20 10:24:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 10:24:53,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 168 [2022-03-20 10:24:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:24:53,147 INFO L225 Difference]: With dead ends: 9926 [2022-03-20 10:24:53,147 INFO L226 Difference]: Without dead ends: 9921 [2022-03-20 10:24:53,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 10:24:53,149 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 128 mSDsluCounter, 1680 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:24:53,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1785 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 10:24:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9921 states. [2022-03-20 10:24:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9921 to 9717. [2022-03-20 10:24:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9717 states, 6488 states have (on average 1.2096177558569667) internal successors, (7848), 6555 states have internal predecessors, (7848), 2722 states have call successors, (2722), 508 states have call predecessors, (2722), 506 states have return successors, (2720), 2653 states have call predecessors, (2720), 2720 states have call successors, (2720) [2022-03-20 10:24:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9717 states to 9717 states and 13290 transitions. [2022-03-20 10:24:56,593 INFO L78 Accepts]: Start accepts. Automaton has 9717 states and 13290 transitions. Word has length 168 [2022-03-20 10:24:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:24:56,593 INFO L478 AbstractCegarLoop]: Abstraction has 9717 states and 13290 transitions. [2022-03-20 10:24:56,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-20 10:24:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 9717 states and 13290 transitions. [2022-03-20 10:24:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-03-20 10:24:56,599 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:24:56,599 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 11, 10, 7, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:24:56,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 10:24:56,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:24:56,816 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:24:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:24:56,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1364196507, now seen corresponding path program 1 times [2022-03-20 10:24:56,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:24:56,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027342420] [2022-03-20 10:24:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:24:56,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:24:56,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:24:56,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081146388] [2022-03-20 10:24:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:24:56,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:24:56,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:24:56,833 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:24:56,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 10:24:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 10:24:57,034 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 10:24:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 10:24:57,239 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 10:24:57,239 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 10:24:57,240 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 10:24:57,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 10:24:57,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 10:24:57,449 INFO L719 BasicCegarLoop]: Path program histogram: [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:24:57,451 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 10:24:57,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:24:57 BasicIcfg [2022-03-20 10:24:57,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 10:24:57,517 INFO L158 Benchmark]: Toolchain (without parser) took 391158.68ms. Allocated memory was 185.6MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 131.3MB in the beginning and 1.0GB in the end (delta: -886.3MB). Peak memory consumption was 513.0MB. Max. memory is 8.0GB. [2022-03-20 10:24:57,517 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 185.6MB. Free memory is still 147.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 10:24:57,517 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.28ms. Allocated memory was 185.6MB in the beginning and 227.5MB in the end (delta: 41.9MB). Free memory was 131.0MB in the beginning and 199.9MB in the end (delta: -68.8MB). Peak memory consumption was 9.0MB. Max. memory is 8.0GB. [2022-03-20 10:24:57,518 INFO L158 Benchmark]: Boogie Preprocessor took 28.64ms. Allocated memory is still 227.5MB. Free memory was 199.8MB in the beginning and 198.0MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 10:24:57,518 INFO L158 Benchmark]: RCFGBuilder took 276.44ms. Allocated memory is still 227.5MB. Free memory was 198.0MB in the beginning and 186.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 10:24:57,518 INFO L158 Benchmark]: IcfgTransformer took 34.05ms. Allocated memory is still 227.5MB. Free memory was 186.2MB in the beginning and 184.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 10:24:57,518 INFO L158 Benchmark]: TraceAbstraction took 390578.20ms. Allocated memory was 227.5MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 184.4MB in the beginning and 1.0GB in the end (delta: -833.1MB). Peak memory consumption was 525.0MB. Max. memory is 8.0GB. [2022-03-20 10:24:57,518 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 185.6MB. Free memory is still 147.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.28ms. Allocated memory was 185.6MB in the beginning and 227.5MB in the end (delta: 41.9MB). Free memory was 131.0MB in the beginning and 199.9MB in the end (delta: -68.8MB). Peak memory consumption was 9.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.64ms. Allocated memory is still 227.5MB. Free memory was 199.8MB in the beginning and 198.0MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 276.44ms. Allocated memory is still 227.5MB. Free memory was 198.0MB in the beginning and 186.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 34.05ms. Allocated memory is still 227.5MB. Free memory was 186.2MB in the beginning and 184.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 390578.20ms. Allocated memory was 227.5MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 184.4MB in the beginning and 1.0GB in the end (delta: -833.1MB). Peak memory consumption was 525.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=27, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=13, y=21] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=13, y=21] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=13, b=21, counter=0, p=1, q=0, r=0, s=1, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=13, b=21, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=13, b=21, c=13, counter=1, k=0, p=1, q=0, r=0, s=1, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=21, c=13, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=13, b=21, c=13, counter=2, k=0, p=1, q=0, r=0, s=1, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=21, b=13, c=13, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=13, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=21, b=13, c=21, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=21, b=13, c=21, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=21, b=13, c=21, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=21, b=13, c=8, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=8, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=21, b=13, c=8, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=13, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=13, b=8, c=8, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=8, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=13, b=8, c=13, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=13, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=13, b=8, c=13, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=13, b=8, c=13, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=13, b=8, c=5, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=5, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=13, b=8, c=5, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=8, b=5, c=5, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=5, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=8, b=5, c=8, counter=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=12, counter++=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=8, b=5, c=8, counter=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, counter++=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=8, b=5, c=8, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=8, b=5, c=3, counter=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=3, counter=14, counter++=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=8, b=5, c=3, counter=14, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=5, b=3, c=3, counter=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=3, counter=15, counter++=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=5, b=3, c=5, counter=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=16, counter++=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=5, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=5, b=3, c=5, counter=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, counter++=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=5, b=3, c=5, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=5, b=3, c=2, counter=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=2, counter=18, counter++=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=3, c=2, counter=18, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=13, y=21] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=19, counter++=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=20, counter++=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=3, x=13, y=21] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=21, counter++=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L48] COND FALSE !(counter++<20) [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=22, counter++=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=13, y=21] [L41] COND FALSE !(counter++<20) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=2, x=13, y=21] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=23, counter++=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=2, x=13, y=21] [L34] COND FALSE !(counter++<20) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=23] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=23] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=23] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 390.4s, OverallIterations: 34, TraceHistogramMax: 21, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.1s, AutomataDifference: 300.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 25 mSolverCounterUnknown, 5694 SdHoareTripleChecker+Valid, 142.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5558 mSDsluCounter, 18018 SdHoareTripleChecker+Invalid, 140.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15742 mSDsCounter, 4665 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16338 IncrementalHoareTripleChecker+Invalid, 21028 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4665 mSolverCounterUnsat, 2276 mSDtfsCounter, 16338 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4551 GetRequests, 3718 SyntacticMatches, 27 SemanticMatches, 806 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10890 ImplicationChecksByTransitivity, 169.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9717occurred in iteration=33, InterpolantAutomatonStates: 678, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 23.5s AutomataMinimizationTime, 33 MinimizatonAttempts, 7097 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 55.9s InterpolantComputationTime, 2613 NumberOfCodeBlocks, 2510 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 3970 ConstructedInterpolants, 0 QuantifiedInterpolants, 27346 SizeOfPredicates, 235 NumberOfNonLiveVariables, 7238 ConjunctsInSsa, 1051 ConjunctsInUnsatCore, 52 InterpolantComputations, 12 PerfectInterpolantSequences, 9220/11136 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 10:24:57,603 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...