/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:07:23,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:07:23,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:07:23,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:07:23,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:07:23,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:07:23,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:07:23,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:07:23,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:07:23,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:07:23,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:07:23,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:07:23,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:07:23,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:07:23,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:07:23,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:07:23,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:07:23,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:07:23,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:07:23,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:07:23,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:07:23,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:07:23,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:07:23,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:07:23,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:07:23,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:07:23,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:07:23,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:07:23,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:07:23,647 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:07:23,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:07:23,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:07:23,650 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:07:23,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:07:23,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:07:23,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:07:23,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:07:23,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:07:23,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:07:23,652 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:07:23,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:07:23,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:07:23,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:07:23,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:07:23,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:07:23,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:07:23,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:07:23,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:07:23,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:07:23,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:07:23,655 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:07:23,655 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:07:23,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:07:24,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:07:24,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:07:24,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:07:24,021 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:07:24,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps3-ll.c [2021-05-06 07:07:24,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816c974a6/ce2507fa0cab408fa973af0dad1b9569/FLAG9b3cb8a6b [2021-05-06 07:07:24,486 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:07:24,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps3-ll.c [2021-05-06 07:07:24,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816c974a6/ce2507fa0cab408fa973af0dad1b9569/FLAG9b3cb8a6b [2021-05-06 07:07:24,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/816c974a6/ce2507fa0cab408fa973af0dad1b9569 [2021-05-06 07:07:24,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:07:24,516 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:07:24,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:07:24,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:07:24,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:07:24,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:07:24" (1/1) ... [2021-05-06 07:07:24,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5926fc9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:24, skipping insertion in model container [2021-05-06 07:07:24,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:07:24" (1/1) ... [2021-05-06 07:07:24,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:07:24,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:07:24,698 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps3-ll.c[458,471] [2021-05-06 07:07:24,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:07:24,720 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:07:24,733 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps3-ll.c[458,471] [2021-05-06 07:07:24,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:07:24,758 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:07:24,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:24 WrapperNode [2021-05-06 07:07:24,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:07:24,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:07:24,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:07:24,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:07:24,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:24" (1/1) ... [2021-05-06 07:07:24,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:24" (1/1) ... [2021-05-06 07:07:24,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:24" (1/1) ... [2021-05-06 07:07:24,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:24" (1/1) ... [2021-05-06 07:07:24,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:24" (1/1) ... [2021-05-06 07:07:24,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:24" (1/1) ... [2021-05-06 07:07:24,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:24" (1/1) ... [2021-05-06 07:07:24,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:07:24,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:07:24,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:07:24,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:07:24,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:07:24,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:07:24,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:07:24,907 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:07:24,907 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:07:24,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:07:24,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:07:24,908 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:07:24,908 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:07:24,908 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:07:24,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:07:24,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 07:07:24,909 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:07:24,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:07:24,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:07:24,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:07:24,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:07:24,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:07:24,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:07:24,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:07:24,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:07:25,200 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:07:25,201 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:07:25,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:07:25 BoogieIcfgContainer [2021-05-06 07:07:25,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:07:25,202 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:07:25,203 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:07:25,203 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:07:25,205 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:07:25" (1/1) ... [2021-05-06 07:07:25,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:07:25 BasicIcfg [2021-05-06 07:07:25,218 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:07:25,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:07:25,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:07:25,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:07:25,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:07:24" (1/4) ... [2021-05-06 07:07:25,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ad1945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:07:25, skipping insertion in model container [2021-05-06 07:07:25,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:24" (2/4) ... [2021-05-06 07:07:25,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ad1945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:07:25, skipping insertion in model container [2021-05-06 07:07:25,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:07:25" (3/4) ... [2021-05-06 07:07:25,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ad1945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:07:25, skipping insertion in model container [2021-05-06 07:07:25,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:07:25" (4/4) ... [2021-05-06 07:07:25,225 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll.cJordan [2021-05-06 07:07:25,229 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:07:25,232 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:07:25,259 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:07:25,275 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:07:25,276 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:07:25,276 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:07:25,276 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:07:25,276 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:07:25,276 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:07:25,276 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:07:25,276 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:07:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:07:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 07:07:25,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:07:25,294 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:07:25,294 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:07:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:07:25,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1229966674, now seen corresponding path program 1 times [2021-05-06 07:07:25,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:07:25,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008835520] [2021-05-06 07:07:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:07:25,425 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:07:25,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144784849] [2021-05-06 07:07:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:07:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:07:25,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:07:25,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:07:25,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:07:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:07:25,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:07:25,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008835520] [2021-05-06 07:07:25,660 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:07:25,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144784849] [2021-05-06 07:07:25,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144784849] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:07:25,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:07:25,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:07:25,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424538803] [2021-05-06 07:07:25,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:07:25,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:07:25,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:07:25,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:07:25,683 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:07:25,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:07:25,764 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-06 07:07:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:07:25,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 07:07:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:07:25,771 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:07:25,771 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 07:07:25,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:07:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 07:07:25,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 07:07:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:07:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-06 07:07:25,802 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2021-05-06 07:07:25,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:07:25,803 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-06 07:07:25,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:07:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-06 07:07:25,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:07:25,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:07:25,804 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:07:26,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 07:07:26,030 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:07:26,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:07:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash 726352862, now seen corresponding path program 1 times [2021-05-06 07:07:26,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:07:26,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208284905] [2021-05-06 07:07:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:07:26,040 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:07:26,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212742292] [2021-05-06 07:07:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:07:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:07:26,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:07:26,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:07:26,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:07:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:07:26,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:07:26,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208284905] [2021-05-06 07:07:26,191 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:07:26,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212742292] [2021-05-06 07:07:26,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212742292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:07:26,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:07:26,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:07:26,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161739506] [2021-05-06 07:07:26,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:07:26,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:07:26,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:07:26,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:07:26,194 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:07:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:07:26,246 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-05-06 07:07:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:07:26,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 07:07:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:07:26,248 INFO L225 Difference]: With dead ends: 31 [2021-05-06 07:07:26,248 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 07:07:26,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:07:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 07:07:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 07:07:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:07:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-06 07:07:26,253 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-05-06 07:07:26,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:07:26,253 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-06 07:07:26,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:07:26,254 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-06 07:07:26,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 07:07:26,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:07:26,254 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:07:26,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:07:26,489 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:07:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:07:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash -796689234, now seen corresponding path program 2 times [2021-05-06 07:07:26,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:07:26,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561471106] [2021-05-06 07:07:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:07:26,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:07:26,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561857762] [2021-05-06 07:07:26,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:07:26,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:07:26,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:07:26,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 07:07:26,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:07:26,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:07:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:07:26,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:07:26,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561471106] [2021-05-06 07:07:26,820 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:07:26,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561857762] [2021-05-06 07:07:26,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561857762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:07:26,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:07:26,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:07:26,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848207039] [2021-05-06 07:07:26,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:07:26,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:07:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:07:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:07:26,822 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:07:26,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:07:26,958 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-05-06 07:07:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:07:26,959 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-05-06 07:07:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:07:26,962 INFO L225 Difference]: With dead ends: 38 [2021-05-06 07:07:26,963 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 07:07:26,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:07:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 07:07:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 07:07:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:07:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-05-06 07:07:26,977 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 25 [2021-05-06 07:07:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:07:26,978 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-05-06 07:07:26,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:07:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-05-06 07:07:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:07:26,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:07:26,979 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:07:27,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:07:27,187 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:07:27,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:07:27,188 INFO L82 PathProgramCache]: Analyzing trace with hash 84982238, now seen corresponding path program 3 times [2021-05-06 07:07:27,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:07:27,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233522044] [2021-05-06 07:07:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:07:27,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:07:27,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190842937] [2021-05-06 07:07:27,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:07:28,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 07:07:28,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:07:28,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:07:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:07:28,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:07:28,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:07:28,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:07:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-06 07:07:29,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:07:29,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233522044] [2021-05-06 07:07:29,006 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:07:29,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190842937] [2021-05-06 07:07:29,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190842937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:07:29,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:07:29,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:07:29,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915511722] [2021-05-06 07:07:29,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:07:29,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:07:29,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:07:29,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:07:29,008 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:07:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:07:29,045 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-05-06 07:07:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:07:29,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-05-06 07:07:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:07:29,046 INFO L225 Difference]: With dead ends: 35 [2021-05-06 07:07:29,046 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:07:29,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:07:29,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:07:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:07:29,048 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) [2021-05-06 07:07:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:07:29,048 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-06 07:07:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:07:29,049 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:07:29,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:07:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:07:29,050 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:07:29,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:07:29,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:07:29 BasicIcfg [2021-05-06 07:07:29,264 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:07:29,265 INFO L168 Benchmark]: Toolchain (without parser) took 4749.14 ms. Allocated memory is still 198.2 MB. Free memory was 163.0 MB in the beginning and 135.1 MB in the end (delta: 28.0 MB). Peak memory consumption was 29.2 MB. Max. memory is 8.0 GB. [2021-05-06 07:07:29,265 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 179.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:07:29,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.52 ms. Allocated memory is still 198.2 MB. Free memory was 162.7 MB in the beginning and 153.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 07:07:29,265 INFO L168 Benchmark]: Boogie Preprocessor took 69.44 ms. Allocated memory is still 198.2 MB. Free memory was 153.1 MB in the beginning and 181.5 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:07:29,265 INFO L168 Benchmark]: RCFGBuilder took 370.67 ms. Allocated memory is still 198.2 MB. Free memory was 181.1 MB in the beginning and 166.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 07:07:29,266 INFO L168 Benchmark]: IcfgTransformer took 15.58 ms. Allocated memory is still 198.2 MB. Free memory was 166.4 MB in the beginning and 165.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:07:29,266 INFO L168 Benchmark]: TraceAbstraction took 4044.90 ms. Allocated memory is still 198.2 MB. Free memory was 164.8 MB in the beginning and 135.1 MB in the end (delta: 29.8 MB). Peak memory consumption was 30.8 MB. Max. memory is 8.0 GB. [2021-05-06 07:07:29,266 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 179.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 239.52 ms. Allocated memory is still 198.2 MB. Free memory was 162.7 MB in the beginning and 153.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.44 ms. Allocated memory is still 198.2 MB. Free memory was 153.1 MB in the beginning and 181.5 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 370.67 ms. Allocated memory is still 198.2 MB. Free memory was 181.1 MB in the beginning and 166.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 15.58 ms. Allocated memory is still 198.2 MB. Free memory was 166.4 MB in the beginning and 165.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4044.90 ms. Allocated memory is still 198.2 MB. Free memory was 164.8 MB in the beginning and 135.1 MB in the end (delta: 29.8 MB). Peak memory consumption was 30.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3987.7ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 11.8ms, AutomataDifference: 342.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 62 SDtfs, 36 SDslu, 225 SDs, 0 SdLazy, 134 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 139.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 207.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=3, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 34.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 38.5ms SsaConstructionTime, 1763.7ms SatisfiabilityAnalysisTime, 547.2ms InterpolantComputationTime, 86 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 282 SizeOfPredicates, 6 NumberOfNonLiveVariables, 440 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 41/52 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...