/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/prodbin-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 11:34:31,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 11:34:31,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 11:34:31,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 11:34:31,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 11:34:31,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 11:34:31,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 11:34:31,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 11:34:31,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 11:34:31,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 11:34:31,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 11:34:31,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 11:34:31,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 11:34:31,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 11:34:31,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 11:34:31,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 11:34:31,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 11:34:31,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 11:34:31,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 11:34:31,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 11:34:31,448 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 11:34:31,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 11:34:31,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 11:34:31,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 11:34:31,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 11:34:31,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 11:34:31,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 11:34:31,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 11:34:31,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 11:34:31,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 11:34:31,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 11:34:31,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 11:34:31,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 11:34:31,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 11:34:31,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 11:34:31,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 11:34:31,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 11:34:31,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 11:34:31,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 11:34:31,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 11:34:31,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 11:34:31,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 11:34:31,462 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 11:34:31,481 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 11:34:31,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 11:34:31,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 11:34:31,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 11:34:31,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 11:34:31,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 11:34:31,483 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 11:34:31,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 11:34:31,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 11:34:31,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 11:34:31,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 11:34:31,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 11:34:31,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 11:34:31,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 11:34:31,484 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 11:34:31,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 11:34:31,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 11:34:31,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 11:34:31,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 11:34:31,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:34:31,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 11:34:31,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 11:34:31,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 11:34:31,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 11:34:31,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 11:34:31,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 11:34:31,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 11:34:31,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 11:34:31,486 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 11:34:31,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 11:34:31,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 11:34:31,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 11:34:31,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 11:34:31,670 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 11:34:31,671 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 11:34:31,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c [2022-03-20 11:34:31,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d628197f/bbdfff37330643faa6d2d80746791643/FLAGaeccc4e64 [2022-03-20 11:34:32,034 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 11:34:32,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c [2022-03-20 11:34:32,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d628197f/bbdfff37330643faa6d2d80746791643/FLAGaeccc4e64 [2022-03-20 11:34:32,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d628197f/bbdfff37330643faa6d2d80746791643 [2022-03-20 11:34:32,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 11:34:32,474 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 11:34:32,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 11:34:32,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 11:34:32,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 11:34:32,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:34:32" (1/1) ... [2022-03-20 11:34:32,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@192f0d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:34:32, skipping insertion in model container [2022-03-20 11:34:32,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:34:32" (1/1) ... [2022-03-20 11:34:32,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 11:34:32,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 11:34:32,589 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/prodbin-ll_valuebound10.c[537,550] [2022-03-20 11:34:32,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:34:32,607 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 11:34:32,614 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/prodbin-ll_valuebound10.c[537,550] [2022-03-20 11:34:32,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:34:32,628 INFO L208 MainTranslator]: Completed translation [2022-03-20 11:34:32,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:34:32 WrapperNode [2022-03-20 11:34:32,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 11:34:32,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 11:34:32,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 11:34:32,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 11:34:32,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:34:32" (1/1) ... [2022-03-20 11:34:32,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:34:32" (1/1) ... [2022-03-20 11:34:32,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:34:32" (1/1) ... [2022-03-20 11:34:32,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:34:32" (1/1) ... [2022-03-20 11:34:32,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:34:32" (1/1) ... [2022-03-20 11:34:32,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:34:32" (1/1) ... [2022-03-20 11:34:32,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:34:32" (1/1) ... [2022-03-20 11:34:32,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 11:34:32,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 11:34:32,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 11:34:32,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 11:34:32,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:34:32" (1/1) ... [2022-03-20 11:34:32,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:34:32,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:34:32,670 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 11:34:32,675 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 11:34:32,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 11:34:32,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 11:34:32,698 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 11:34:32,698 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 11:34:32,698 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 11:34:32,698 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 11:34:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 11:34:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 11:34:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 11:34:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 11:34:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 11:34:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 11:34:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 11:34:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 11:34:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 11:34:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 11:34:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 11:34:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 11:34:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 11:34:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 11:34:32,746 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 11:34:32,747 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 11:34:32,825 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 11:34:32,828 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 11:34:32,829 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 11:34:32,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:34:32 BoogieIcfgContainer [2022-03-20 11:34:32,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 11:34:32,830 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 11:34:32,830 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 11:34:32,831 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 11:34:32,833 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:34:32" (1/1) ... [2022-03-20 11:34:32,834 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 11:34:32,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:34:32 BasicIcfg [2022-03-20 11:34:32,848 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 11:34:32,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 11:34:32,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 11:34:32,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 11:34:32,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 11:34:32" (1/4) ... [2022-03-20 11:34:32,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4745b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:34:32, skipping insertion in model container [2022-03-20 11:34:32,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:34:32" (2/4) ... [2022-03-20 11:34:32,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4745b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:34:32, skipping insertion in model container [2022-03-20 11:34:32,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:34:32" (3/4) ... [2022-03-20 11:34:32,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4745b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:34:32, skipping insertion in model container [2022-03-20 11:34:32,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:34:32" (4/4) ... [2022-03-20 11:34:32,864 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound10.cqvasr [2022-03-20 11:34:32,867 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 11:34:32,867 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 11:34:32,899 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 11:34:32,903 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 11:34:32,904 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 11:34:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 11:34:32,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 11:34:32,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:34:32,929 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:34:32,929 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:34:32,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:34:32,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2022-03-20 11:34:32,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:34:32,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453787512] [2022-03-20 11:34:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:32,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:34:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:34:33,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 11:34:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:34:33,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 11:34:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:34:33,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 11:34:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:34:33,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 11:34:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:34:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 11:34:33,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:34:33,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453787512] [2022-03-20 11:34:33,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453787512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:34:33,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:34:33,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 11:34:33,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639076421] [2022-03-20 11:34:33,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:34:33,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 11:34:33,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:34:33,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 11:34:33,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 11:34:33,159 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 11:34:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:34:33,205 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-03-20 11:34:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 11:34:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 11:34:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:34:33,212 INFO L225 Difference]: With dead ends: 57 [2022-03-20 11:34:33,212 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 11:34:33,214 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 11:34:33,219 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:34:33,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:34:33,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 11:34:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 11:34:33,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:34:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-20 11:34:33,243 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-03-20 11:34:33,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:34:33,243 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-20 11:34:33,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 11:34:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-20 11:34:33,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 11:34:33,244 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:34:33,244 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:34:33,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 11:34:33,245 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:34:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:34:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2022-03-20 11:34:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:34:33,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483005043] [2022-03-20 11:34:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:33,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:34:33,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:34:33,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577303524] [2022-03-20 11:34:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:33,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:34:33,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:34:33,261 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 11:34:33,262 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 11:34:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:34:33,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 11:34:33,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:34:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 11:34:33,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:34:33,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:34:33,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483005043] [2022-03-20 11:34:33,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:34:33,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577303524] [2022-03-20 11:34:33,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577303524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:34:33,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:34:33,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 11:34:33,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180191917] [2022-03-20 11:34:33,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:34:33,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:34:33,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:34:33,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:34:33,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 11:34:33,398 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 11:34:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:34:33,432 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-03-20 11:34:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:34:33,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 11:34:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:34:33,434 INFO L225 Difference]: With dead ends: 39 [2022-03-20 11:34:33,434 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 11:34:33,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 11:34:33,435 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:34:33,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:34:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 11:34:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-03-20 11:34:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 11:34:33,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-03-20 11:34:33,446 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-03-20 11:34:33,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:34:33,447 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-03-20 11:34:33,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 11:34:33,447 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-03-20 11:34:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 11:34:33,448 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:34:33,448 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 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 11:34:33,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 11:34:33,651 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 11:34:33,652 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:34:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:34:33,652 INFO L85 PathProgramCache]: Analyzing trace with hash -499634320, now seen corresponding path program 1 times [2022-03-20 11:34:33,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:34:33,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334143668] [2022-03-20 11:34:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:33,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:34:33,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:34:33,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378411667] [2022-03-20 11:34:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:33,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:34:33,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:34:33,665 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 11:34:33,667 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 11:34:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:34:33,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 11:34:33,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:34:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 11:34:33,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:34:33,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:34:33,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334143668] [2022-03-20 11:34:33,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:34:33,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378411667] [2022-03-20 11:34:33,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378411667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:34:33,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:34:33,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 11:34:33,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463354103] [2022-03-20 11:34:33,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:34:33,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 11:34:33,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:34:33,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 11:34:33,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 11:34:33,840 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 11:34:33,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:34:33,898 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-03-20 11:34:33,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 11:34:33,899 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-20 11:34:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:34:33,902 INFO L225 Difference]: With dead ends: 43 [2022-03-20 11:34:33,902 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 11:34:33,904 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 11:34:33,906 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:34:33,907 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 99 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:34:33,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 11:34:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-03-20 11:34:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 11:34:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-20 11:34:33,913 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-03-20 11:34:33,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:34:33,913 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-20 11:34:33,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 11:34:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-20 11:34:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 11:34:33,914 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:34:33,914 INFO L499 BasicCegarLoop]: trace histogram [3, 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] [2022-03-20 11:34:33,933 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 11:34:34,130 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 11:34:34,131 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:34:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:34:34,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2022-03-20 11:34:34,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:34:34,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675811466] [2022-03-20 11:34:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:34,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:34:34,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:34:34,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686874954] [2022-03-20 11:34:34,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:34,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:34:34,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:34:34,143 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 11:34:34,144 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 11:34:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:34:34,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 11:34:34,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:34:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 11:34:34,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:34:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 11:34:42,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:34:42,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675811466] [2022-03-20 11:34:42,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:34:42,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686874954] [2022-03-20 11:34:42,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686874954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:34:42,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:34:42,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 11:34:42,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999328159] [2022-03-20 11:34:42,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:34:42,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 11:34:42,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:34:42,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 11:34:42,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=142, Unknown=2, NotChecked=0, Total=182 [2022-03-20 11:34:42,790 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 11:34:47,708 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 11:34:56,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 11:34:58,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 11:34:58,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:34:58,397 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-03-20 11:34:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 11:34:58,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2022-03-20 11:34:58,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:34:58,399 INFO L225 Difference]: With dead ends: 52 [2022-03-20 11:34:58,399 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 11:34:58,399 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=80, Invalid=298, Unknown=2, NotChecked=0, Total=380 [2022-03-20 11:34:58,400 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-03-20 11:34:58,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 171 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 121 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-03-20 11:34:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 11:34:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-03-20 11:34:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 11:34:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-20 11:34:58,406 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 37 [2022-03-20 11:34:58,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:34:58,406 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-20 11:34:58,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 11:34:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-20 11:34:58,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 11:34:58,407 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:34:58,407 INFO L499 BasicCegarLoop]: trace histogram [3, 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] [2022-03-20 11:34:58,427 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 11:34:58,607 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 11:34:58,608 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:34:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:34:58,608 INFO L85 PathProgramCache]: Analyzing trace with hash -209104877, now seen corresponding path program 1 times [2022-03-20 11:34:58,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:34:58,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282269895] [2022-03-20 11:34:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:58,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:34:58,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:34:58,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687386677] [2022-03-20 11:34:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:58,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:34:58,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:34:58,619 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 11:34:58,620 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 11:34:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:34:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 11:34:58,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:35:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 11:35:04,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:35:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 11:35:05,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:35:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282269895] [2022-03-20 11:35:05,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:35:05,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687386677] [2022-03-20 11:35:05,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687386677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:35:05,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:35:05,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-03-20 11:35:05,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647355028] [2022-03-20 11:35:05,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:35:05,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 11:35:05,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:35:05,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 11:35:05,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-20 11:35:05,021 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 11:35:05,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:35:05,745 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-03-20 11:35:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 11:35:05,745 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-03-20 11:35:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:35:05,747 INFO L225 Difference]: With dead ends: 66 [2022-03-20 11:35:05,747 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 11:35:05,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-20 11:35:05,748 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 11:35:05,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 180 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 11:35:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 11:35:05,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-20 11:35:05,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 11:35:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-03-20 11:35:05,754 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 37 [2022-03-20 11:35:05,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:35:05,755 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-03-20 11:35:05,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 11:35:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-03-20 11:35:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 11:35:05,755 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:35:05,756 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-03-20 11:35:05,772 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 11:35:05,963 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 11:35:05,963 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:35:05,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:35:05,964 INFO L85 PathProgramCache]: Analyzing trace with hash -266261558, now seen corresponding path program 1 times [2022-03-20 11:35:05,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:35:05,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778281311] [2022-03-20 11:35:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:35:05,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:35:05,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:35:05,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273653940] [2022-03-20 11:35:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:35:05,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:35:05,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:35:05,973 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 11:35:05,974 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 11:35:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:35:06,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 11:35:06,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:35:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 11:35:06,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:35:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 11:35:06,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:35:06,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778281311] [2022-03-20 11:35:06,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:35:06,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273653940] [2022-03-20 11:35:06,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273653940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:35:06,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:35:06,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 11:35:06,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181322550] [2022-03-20 11:35:06,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:35:06,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 11:35:06,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:35:06,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 11:35:06,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 11:35:06,186 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 11:35:08,191 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 11:35:08,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:35:08,236 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-03-20 11:35:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 11:35:08,236 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-03-20 11:35:08,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:35:08,237 INFO L225 Difference]: With dead ends: 65 [2022-03-20 11:35:08,237 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 11:35:08,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-20 11:35:08,238 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:35:08,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 11:35:08,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 11:35:08,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-20 11:35:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 11:35:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-03-20 11:35:08,244 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 43 [2022-03-20 11:35:08,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:35:08,244 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-03-20 11:35:08,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 11:35:08,247 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-03-20 11:35:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 11:35:08,248 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:35:08,248 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 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 11:35:08,264 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 11:35:08,464 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 11:35:08,465 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:35:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:35:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1353204359, now seen corresponding path program 1 times [2022-03-20 11:35:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:35:08,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814940747] [2022-03-20 11:35:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:35:08,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:35:08,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:35:08,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169509233] [2022-03-20 11:35:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:35:08,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:35:08,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:35:08,474 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 11:35:08,475 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 11:35:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:35:08,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 11:35:08,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:35:08,783 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 11:35:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-20 11:35:09,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:35:14,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:35:14,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814940747] [2022-03-20 11:35:14,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:35:14,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169509233] [2022-03-20 11:35:14,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169509233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:35:14,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:35:14,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 11:35:14,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566445207] [2022-03-20 11:35:14,797 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:35:14,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 11:35:14,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:35:14,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 11:35:14,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-20 11:35:14,798 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 11:35:16,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 11:35:18,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 11:35:20,206 WARN L534 Checker$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 11:35:21,942 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 11:35:22,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:35:22,082 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2022-03-20 11:35:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 11:35:22,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-03-20 11:35:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:35:22,084 INFO L225 Difference]: With dead ends: 83 [2022-03-20 11:35:22,084 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 11:35:22,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-20 11:35:22,085 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-03-20 11:35:22,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 172 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2022-03-20 11:35:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 11:35:22,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2022-03-20 11:35:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 52 states have internal predecessors, (55), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 11:35:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2022-03-20 11:35:22,092 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 46 [2022-03-20 11:35:22,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:35:22,092 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2022-03-20 11:35:22,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 11:35:22,092 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2022-03-20 11:35:22,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 11:35:22,093 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:35:22,093 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:35:22,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 11:35:22,311 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 11:35:22,311 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:35:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:35:22,312 INFO L85 PathProgramCache]: Analyzing trace with hash -172555565, now seen corresponding path program 2 times [2022-03-20 11:35:22,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:35:22,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426603238] [2022-03-20 11:35:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:35:22,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:35:22,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:35:22,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123481774] [2022-03-20 11:35:22,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:35:22,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:35:22,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:35:22,321 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 11:35:22,322 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 11:35:22,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:35:22,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:35:22,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 11:35:22,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:35:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 11:35:22,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:35:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 11:35:23,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:35:23,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426603238] [2022-03-20 11:35:23,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:35:23,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123481774] [2022-03-20 11:35:23,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123481774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:35:23,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:35:23,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2022-03-20 11:35:23,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809136253] [2022-03-20 11:35:23,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:35:23,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 11:35:23,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:35:23,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 11:35:23,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-03-20 11:35:23,227 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-20 11:35:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:35:23,612 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2022-03-20 11:35:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 11:35:23,613 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 55 [2022-03-20 11:35:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:35:23,614 INFO L225 Difference]: With dead ends: 100 [2022-03-20 11:35:23,614 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 11:35:23,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 11:35:23,615 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:35:23,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 238 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 171 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2022-03-20 11:35:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 11:35:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-20 11:35:23,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 52 states have internal predecessors, (52), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 11:35:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-03-20 11:35:23,621 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 55 [2022-03-20 11:35:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:35:23,622 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-03-20 11:35:23,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-20 11:35:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-03-20 11:35:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 11:35:23,622 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:35:23,623 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:35:23,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 11:35:23,841 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 11:35:23,841 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:35:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:35:23,841 INFO L85 PathProgramCache]: Analyzing trace with hash -683089742, now seen corresponding path program 3 times [2022-03-20 11:35:23,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:35:23,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084870207] [2022-03-20 11:35:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:35:23,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:35:23,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:35:23,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495677308] [2022-03-20 11:35:23,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:35:23,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:35:23,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:35:23,859 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 11:35:23,860 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 11:35:23,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 11:35:23,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:35:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 11:35:23,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:35:24,601 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 11:35:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 11:35:27,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:35:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 11:35:32,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:35:32,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084870207] [2022-03-20 11:35:32,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:35:32,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495677308] [2022-03-20 11:35:32,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495677308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:35:32,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:35:32,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2022-03-20 11:35:32,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627375334] [2022-03-20 11:35:32,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:35:32,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 11:35:32,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:35:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 11:35:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-03-20 11:35:32,641 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 25 states have internal predecessors, (51), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-20 11:35:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:35:52,761 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2022-03-20 11:35:52,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 11:35:52,761 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 25 states have internal predecessors, (51), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 55 [2022-03-20 11:35:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:35:52,761 INFO L225 Difference]: With dead ends: 91 [2022-03-20 11:35:52,762 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 11:35:52,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=368, Invalid=1610, Unknown=2, NotChecked=0, Total=1980 [2022-03-20 11:35:52,763 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:35:52,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 285 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 224 Invalid, 0 Unknown, 30 Unchecked, 1.1s Time] [2022-03-20 11:35:52,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 11:35:52,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-20 11:35:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.0) internal successors, (33), 33 states have internal predecessors, (33), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 11:35:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-03-20 11:35:52,774 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 55 [2022-03-20 11:35:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:35:52,775 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-03-20 11:35:52,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 25 states have internal predecessors, (51), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-20 11:35:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-03-20 11:35:52,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 11:35:52,779 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:35:52,779 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:35:52,801 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 11:35:52,995 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 11:35:52,995 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:35:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:35:52,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2045202388, now seen corresponding path program 4 times [2022-03-20 11:35:52,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:35:52,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252463503] [2022-03-20 11:35:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:35:52,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:35:53,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:35:53,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369995300] [2022-03-20 11:35:53,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:35:53,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:35:53,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:35:53,006 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 11:35:53,033 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 11:35:53,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:35:53,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:35:53,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 11:35:53,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:35:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 11:35:53,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:35:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-20 11:35:56,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:35:56,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252463503] [2022-03-20 11:35:56,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:35:56,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369995300] [2022-03-20 11:35:56,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369995300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:35:56,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:35:56,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2022-03-20 11:35:56,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513461769] [2022-03-20 11:35:56,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:35:56,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 11:35:56,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:35:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 11:35:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-03-20 11:35:56,224 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-20 11:35:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:35:56,582 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-03-20 11:35:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 11:35:56,583 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 55 [2022-03-20 11:35:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:35:56,583 INFO L225 Difference]: With dead ends: 48 [2022-03-20 11:35:56,583 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 11:35:56,583 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-03-20 11:35:56,584 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 11:35:56,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 200 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 184 Invalid, 0 Unknown, 15 Unchecked, 0.3s Time] [2022-03-20 11:35:56,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 11:35:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 11:35:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 11:35:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 11:35:56,585 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2022-03-20 11:35:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:35:56,585 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 11:35:56,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-20 11:35:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 11:35:56,585 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 11:35:56,587 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 11:35:56,603 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 11:35:56,789 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 11:35:56,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 11:36:02,644 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 11:36:02,645 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 11:36:02,645 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 11:36:02,645 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 11:36:02,645 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 11:36:02,645 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 11:36:02,645 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 11:36:02,645 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-03-20 11:36:02,645 INFO L882 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-03-20 11:36:02,645 INFO L882 garLoopResultBuilder]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2022-03-20 11:36:02,645 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-03-20 11:36:02,645 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-03-20 11:36:02,645 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-20 11:36:02,645 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-03-20 11:36:02,645 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-03-20 11:36:02,645 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 main_~b~0) (<= main_~b~0 10)) [2022-03-20 11:36:02,645 INFO L882 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-03-20 11:36:02,646 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse0 (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (.cse1 (<= 1 main_~b~0)) (.cse2 (<= main_~b~0 10))) (or (and .cse0 .cse1 (= main_~y~0 0)) (and (<= 0 main_~y~0) .cse0 (<= main_~y~0 4) .cse1 .cse2) (and (= main_~y~0 (div main_~b~0 2)) .cse0 (= (* main_~a~0 2) main_~x~0) .cse1 .cse2) (and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~y~0) .cse2 (= main_~a~0 main_~x~0)))) [2022-03-20 11:36:02,646 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (= main_~z~0 .cse0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (<= 1 main_~b~0))) [2022-03-20 11:36:02,646 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (.cse1 (<= 1 main_~b~0)) (.cse2 (<= main_~b~0 10))) (or (and .cse0 .cse1 (= main_~y~0 0)) (and (<= 0 main_~y~0) .cse0 (<= main_~y~0 4) .cse1 .cse2) (and (= main_~y~0 (div main_~b~0 2)) .cse0 (= (* main_~a~0 2) main_~x~0) .cse1 .cse2) (and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~y~0) .cse2 (= main_~a~0 main_~x~0)))) [2022-03-20 11:36:02,646 INFO L882 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-03-20 11:36:02,646 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-03-20 11:36:02,646 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2022-03-20 11:36:02,646 INFO L882 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-03-20 11:36:02,646 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2022-03-20 11:36:02,646 INFO L882 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2022-03-20 11:36:02,646 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-03-20 11:36:02,646 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-03-20 11:36:02,646 INFO L882 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-03-20 11:36:02,646 INFO L882 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-03-20 11:36:02,646 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-03-20 11:36:02,646 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-03-20 11:36:02,649 INFO L719 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1] [2022-03-20 11:36:02,650 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 11:36:02,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:36:02 BasicIcfg [2022-03-20 11:36:02,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 11:36:02,659 INFO L158 Benchmark]: Toolchain (without parser) took 90184.60ms. Allocated memory was 212.9MB in the beginning and 272.6MB in the end (delta: 59.8MB). Free memory was 160.6MB in the beginning and 188.9MB in the end (delta: -28.3MB). Peak memory consumption was 127.1MB. Max. memory is 8.0GB. [2022-03-20 11:36:02,659 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 212.9MB. Free memory was 176.6MB in the beginning and 176.5MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 11:36:02,659 INFO L158 Benchmark]: CACSL2BoogieTranslator took 152.61ms. Allocated memory is still 212.9MB. Free memory was 160.4MB in the beginning and 189.0MB in the end (delta: -28.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 11:36:02,659 INFO L158 Benchmark]: Boogie Preprocessor took 17.41ms. Allocated memory is still 212.9MB. Free memory was 189.0MB in the beginning and 188.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 11:36:02,659 INFO L158 Benchmark]: RCFGBuilder took 182.37ms. Allocated memory is still 212.9MB. Free memory was 187.7MB in the beginning and 177.4MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 11:36:02,660 INFO L158 Benchmark]: IcfgTransformer took 17.54ms. Allocated memory is still 212.9MB. Free memory was 177.4MB in the beginning and 176.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 11:36:02,660 INFO L158 Benchmark]: TraceAbstraction took 89799.08ms. Allocated memory was 212.9MB in the beginning and 272.6MB in the end (delta: 59.8MB). Free memory was 175.8MB in the beginning and 188.9MB in the end (delta: -13.1MB). Peak memory consumption was 143.0MB. Max. memory is 8.0GB. [2022-03-20 11:36:02,661 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 212.9MB. Free memory was 176.6MB in the beginning and 176.5MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 152.61ms. Allocated memory is still 212.9MB. Free memory was 160.4MB in the beginning and 189.0MB in the end (delta: -28.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.41ms. Allocated memory is still 212.9MB. Free memory was 189.0MB in the beginning and 188.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 182.37ms. Allocated memory is still 212.9MB. Free memory was 187.7MB in the beginning and 177.4MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 17.54ms. Allocated memory is still 212.9MB. Free memory was 177.4MB in the beginning and 176.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 89799.08ms. Allocated memory was 212.9MB in the beginning and 272.6MB in the end (delta: 59.8MB). Free memory was 175.8MB in the beginning and 188.9MB in the end (delta: -13.1MB). Peak memory consumption was 143.0MB. 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 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 89.8s, OverallIterations: 10, TraceHistogramMax: 4, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 46.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 275 SdHoareTripleChecker+Valid, 17.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 264 mSDsluCounter, 1584 SdHoareTripleChecker+Invalid, 17.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 55 IncrementalHoareTripleChecker+Unchecked, 1333 mSDsCounter, 146 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1235 IncrementalHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 146 mSolverCounterUnsat, 251 mSDtfsCounter, 1235 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 748 GetRequests, 550 SyntacticMatches, 15 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 52.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, InterpolantAutomatonStates: 132, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 35 PreInvPairs, 62 NumberOfFragments, 201 HoareAnnotationTreeSize, 35 FomulaSimplifications, 149 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 2043 FormulaSimplificationTreeSizeReductionInter, 5.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 34.5s InterpolantComputationTime, 418 NumberOfCodeBlocks, 415 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 684 ConstructedInterpolants, 5 QuantifiedInterpolants, 4098 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1060 ConjunctsInSsa, 189 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 368/483 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((z + y * x == b * a && 1 <= b) && y == 0) || ((((0 <= y && z + y * x == b * a) && y <= 4) && 1 <= b) && b <= 10)) || ((((y == b / 2 && z + y * x == b * a) && a * 2 == x) && 1 <= b) && b <= 10)) || ((((z == 0 && b == y) && 1 <= y) && b <= 10) && a == x) RESULT: Ultimate proved your program to be correct! [2022-03-20 11:36:02,690 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...