/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-scaling/fermat1-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:22:45,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:22:45,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:22:45,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:22:45,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:22:45,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:22:45,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:22:45,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:22:45,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:22:45,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:22:45,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:22:45,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:22:45,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:22:45,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:22:45,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:22:45,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:22:45,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:22:45,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:22:45,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:22:45,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:22:45,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:22:45,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:22:45,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:22:45,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:22:45,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:22:45,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:22:45,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:22:45,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:22:45,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:22:45,354 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:22:45,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:22:45,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:22:45,356 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:22:45,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:22:45,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:22:45,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:22:45,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:22:45,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:22:45,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:22:45,357 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:22:45,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:22:45,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:22:45,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:22:45,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:22:45,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:22:45,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:22:45,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:22:45,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:22:45,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:22:45,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:22:45,359 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:22:45,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:22:45,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:22:45,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:22:45,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:22:45,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:22:45,741 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:22:45,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound1.c [2021-05-06 08:22:45,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da4a6983c/7a91c23c76b543b6b0eb7e63662467dc/FLAG3b03abb8a [2021-05-06 08:22:46,149 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:22:46,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound1.c [2021-05-06 08:22:46,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da4a6983c/7a91c23c76b543b6b0eb7e63662467dc/FLAG3b03abb8a [2021-05-06 08:22:46,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da4a6983c/7a91c23c76b543b6b0eb7e63662467dc [2021-05-06 08:22:46,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:22:46,184 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:22:46,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:46,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:22:46,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:22:46,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:46" (1/1) ... [2021-05-06 08:22:46,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131db5f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:46, skipping insertion in model container [2021-05-06 08:22:46,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:46" (1/1) ... [2021-05-06 08:22:46,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:22:46,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:22:46,364 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-scaling/fermat1-ll_unwindbound1.c[535,548] [2021-05-06 08:22:46,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:46,404 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:22:46,434 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-scaling/fermat1-ll_unwindbound1.c[535,548] [2021-05-06 08:22:46,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:46,494 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:22:46,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:46 WrapperNode [2021-05-06 08:22:46,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:46,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:22:46,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:22:46,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:22:46,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:46" (1/1) ... [2021-05-06 08:22:46,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:46" (1/1) ... [2021-05-06 08:22:46,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:46" (1/1) ... [2021-05-06 08:22:46,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:46" (1/1) ... [2021-05-06 08:22:46,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:46" (1/1) ... [2021-05-06 08:22:46,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:46" (1/1) ... [2021-05-06 08:22:46,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:46" (1/1) ... [2021-05-06 08:22:46,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:22:46,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:22:46,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:22:46,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:22:46,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:46" (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 08:22:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:22:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:22:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:22:46,620 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:22:46,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:22:46,620 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:22:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:22:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:22:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:22:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:22:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:22:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:22:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:22:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:22:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:22:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:22:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:22:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:22:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:22:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:22:46,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:22:46,866 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:22:46,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:46 BoogieIcfgContainer [2021-05-06 08:22:46,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:22:46,868 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:22:46,868 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:22:46,869 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:22:46,871 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:46" (1/1) ... [2021-05-06 08:22:46,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:46 BasicIcfg [2021-05-06 08:22:46,885 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:22:46,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:22:46,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:22:46,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:22:46,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:22:46" (1/4) ... [2021-05-06 08:22:46,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655ef3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:46, skipping insertion in model container [2021-05-06 08:22:46,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:46" (2/4) ... [2021-05-06 08:22:46,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655ef3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:46, skipping insertion in model container [2021-05-06 08:22:46,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:46" (3/4) ... [2021-05-06 08:22:46,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655ef3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:46, skipping insertion in model container [2021-05-06 08:22:46,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:46" (4/4) ... [2021-05-06 08:22:46,891 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound1.cJordan [2021-05-06 08:22:46,896 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:22:46,899 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:22:46,913 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:22:46,929 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:22:46,929 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:22:46,929 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:22:46,929 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:22:46,929 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:22:46,929 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:22:46,929 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:22:46,930 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:22:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:22:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:22:46,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:46,946 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:46,947 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:46,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:46,951 INFO L82 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2021-05-06 08:22:46,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:46,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991248058] [2021-05-06 08:22:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:47,118 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:47,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365798061] [2021-05-06 08:22:47,119 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 08:22:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:47,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:22:47,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 08:22:47,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:47,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991248058] [2021-05-06 08:22:47,310 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:47,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365798061] [2021-05-06 08:22:47,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365798061] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:47,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:47,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:22:47,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782873813] [2021-05-06 08:22:47,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:22:47,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:47,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:22:47,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:22:47,326 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:47,339 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-06 08:22:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:22:47,340 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 08:22:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:47,346 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:22:47,346 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:22:47,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:22:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:22:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:22:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:22:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 08:22:47,376 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2021-05-06 08:22:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:47,376 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 08:22:47,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 08:22:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:22:47,378 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:47,378 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:47,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:22:47,581 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:47,582 INFO L82 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2021-05-06 08:22:47,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:47,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181514233] [2021-05-06 08:22:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:47,599 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:47,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763083037] [2021-05-06 08:22:47,599 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 08:22:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:47,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:22:47,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:47,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:22:47,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:47,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181514233] [2021-05-06 08:22:47,830 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:47,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763083037] [2021-05-06 08:22:47,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763083037] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:47,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:47,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:22:47,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462463323] [2021-05-06 08:22:47,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:22:47,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:47,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:22:47,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:22:47,833 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:47,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:47,867 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-05-06 08:22:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:22:47,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:22:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:47,871 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:22:47,871 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 08:22:47,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:22:47,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 08:22:47,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 08:22:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:22:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-06 08:22:47,886 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2021-05-06 08:22:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:47,887 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-06 08:22:47,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-06 08:22:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:22:47,887 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:47,888 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:48,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:48,089 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:48,089 INFO L82 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2021-05-06 08:22:48,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:48,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958447219] [2021-05-06 08:22:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:48,104 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:48,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810834773] [2021-05-06 08:22:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:22:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:48,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:22:48,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:48,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:22:48,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:48,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958447219] [2021-05-06 08:22:48,366 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:48,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810834773] [2021-05-06 08:22:48,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810834773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:48,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:48,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:48,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524754043] [2021-05-06 08:22:48,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:48,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:48,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:48,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:48,368 INFO L87 Difference]: Start difference. First operand 34 states and 43 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:22:54,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:54,594 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-05-06 08:22:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:54,594 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 08:22:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:54,595 INFO L225 Difference]: With dead ends: 51 [2021-05-06 08:22:54,596 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 08:22:54,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:54,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 08:22:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 08:22:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2021-05-06 08:22:54,603 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2021-05-06 08:22:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:54,603 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2021-05-06 08:22:54,603 INFO L481 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:22:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2021-05-06 08:22:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:22:54,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:54,604 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:54,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:54,817 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:54,818 INFO L82 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2021-05-06 08:22:54,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:54,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856838959] [2021-05-06 08:22:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:54,831 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:54,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610262659] [2021-05-06 08:22:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:22:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:54,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:22:54,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:54,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:22:54,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:54,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856838959] [2021-05-06 08:22:54,997 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:54,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610262659] [2021-05-06 08:22:54,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610262659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:54,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:54,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:54,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619333885] [2021-05-06 08:22:54,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:54,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:54,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:54,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:54,999 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:22:55,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:55,119 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-05-06 08:22:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:22:55,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 08:22:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:55,122 INFO L225 Difference]: With dead ends: 55 [2021-05-06 08:22:55,122 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 08:22:55,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:55,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 08:22:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 08:22:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-05-06 08:22:55,135 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 29 [2021-05-06 08:22:55,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:55,135 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-05-06 08:22:55,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:22:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-05-06 08:22:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 08:22:55,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:55,137 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:55,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:55,358 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:55,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:55,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2021-05-06 08:22:55,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:55,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660160631] [2021-05-06 08:22:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:55,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:55,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170239594] [2021-05-06 08:22:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:22:55,460 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:22:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:22:55,480 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:22:55,519 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 08:22:55,519 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 08:22:55,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:55,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:55 BasicIcfg [2021-05-06 08:22:55,761 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:22:55,762 INFO L168 Benchmark]: Toolchain (without parser) took 9577.36 ms. Allocated memory was 180.4 MB in the beginning and 222.3 MB in the end (delta: 41.9 MB). Free memory was 146.3 MB in the beginning and 193.8 MB in the end (delta: -47.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:22:55,762 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 180.4 MB. Free memory is still 162.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:22:55,762 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.03 ms. Allocated memory is still 180.4 MB. Free memory was 146.1 MB in the beginning and 163.6 MB in the end (delta: -17.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:55,762 INFO L168 Benchmark]: Boogie Preprocessor took 50.14 ms. Allocated memory is still 180.4 MB. Free memory was 163.6 MB in the beginning and 162.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:55,762 INFO L168 Benchmark]: RCFGBuilder took 321.01 ms. Allocated memory is still 180.4 MB. Free memory was 162.0 MB in the beginning and 145.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:55,763 INFO L168 Benchmark]: IcfgTransformer took 17.11 ms. Allocated memory is still 180.4 MB. Free memory was 145.2 MB in the beginning and 143.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:55,763 INFO L168 Benchmark]: TraceAbstraction took 8874.75 ms. Allocated memory was 180.4 MB in the beginning and 222.3 MB in the end (delta: 41.9 MB). Free memory was 143.1 MB in the beginning and 193.8 MB in the end (delta: -50.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:22:55,763 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 180.4 MB. Free memory is still 162.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 305.03 ms. Allocated memory is still 180.4 MB. Free memory was 146.1 MB in the beginning and 163.6 MB in the end (delta: -17.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.14 ms. Allocated memory is still 180.4 MB. Free memory was 163.6 MB in the beginning and 162.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 321.01 ms. Allocated memory is still 180.4 MB. Free memory was 162.0 MB in the beginning and 145.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 17.11 ms. Allocated memory is still 180.4 MB. Free memory was 145.2 MB in the beginning and 143.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8874.75 ms. Allocated memory was 180.4 MB in the beginning and 222.3 MB in the end (delta: 41.9 MB). Free memory was 143.1 MB in the beginning and 193.8 MB in the end (delta: -50.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=11, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=3, counter=0, R=2] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=3, counter=0, R=2] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=3, counter=0, r=1, R=2, u=5, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=3, counter=1, counter++=0, R=2, r=1, u=5, v=1] [L34] COND TRUE counter++<1 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=3, counter=1, r=1, R=2, u=5, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=3, counter=1, R=2, r=1, u=5, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=3, counter=2, counter++=1, R=2, r=1, u=5, v=1] [L39] COND FALSE !(counter++<1) [L47] EXPR counter++ VAL [\old(counter)=0, A=3, counter=3, counter++=2, r=1, R=2, u=5, v=1] [L47] COND FALSE !(counter++<1) [L34] EXPR counter++ VAL [\old(counter)=0, A=3, counter=4, counter++=3, r=1, R=2, u=5, v=1] [L34] COND FALSE !(counter++<1) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=4] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=4] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8806.4ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 11.7ms, AutomataDifference: 6425.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 148 SDtfs, 40 SDslu, 303 SDs, 0 SdLazy, 130 SolverSat, 9 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 6264.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 106.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=4, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49.9ms AutomataMinimizationTime, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 73.0ms SsaConstructionTime, 191.9ms SatisfiabilityAnalysisTime, 463.3ms InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 93 ConstructedInterpolants, 0 QuantifiedInterpolants, 255 SizeOfPredicates, 6 NumberOfNonLiveVariables, 515 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 17/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...