/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invariants/const.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 04:15:34,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 04:15:34,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 04:15:34,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 04:15:34,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 04:15:34,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 04:15:34,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 04:15:34,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 04:15:34,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 04:15:34,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 04:15:34,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 04:15:34,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 04:15:34,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 04:15:34,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 04:15:34,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 04:15:34,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 04:15:34,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 04:15:34,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 04:15:34,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 04:15:34,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 04:15:34,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-01 04:15:34,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 04:15:34,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 04:15:34,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 04:15:34,871 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 04:15:34,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 04:15:34,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 04:15:34,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 04:15:34,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 04:15:34,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 04:15:34,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 04:15:34,872 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 04:15:34,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 04:15:34,873 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 04:15:34,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 04:15:34,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 04:15:34,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 04:15:34,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 04:15:34,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 04:15:34,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 04:15:34,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 04:15:34,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-01 04:15:34,875 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-01 04:15:34,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 04:15:35,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 04:15:35,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 04:15:35,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 04:15:35,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 04:15:35,129 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 04:15:35,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/const.c [2021-05-01 04:15:35,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/208a0e086/e605847b335a419d8e036543eb0e4803/FLAGe38cb9a0a [2021-05-01 04:15:35,592 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 04:15:35,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/const.c [2021-05-01 04:15:35,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/208a0e086/e605847b335a419d8e036543eb0e4803/FLAGe38cb9a0a [2021-05-01 04:15:35,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/208a0e086/e605847b335a419d8e036543eb0e4803 [2021-05-01 04:15:35,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 04:15:35,616 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-01 04:15:35,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 04:15:35,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 04:15:35,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 04:15:35,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 04:15:35" (1/1) ... [2021-05-01 04:15:35,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e5df87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:15:35, skipping insertion in model container [2021-05-01 04:15:35,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 04:15:35" (1/1) ... [2021-05-01 04:15:35,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 04:15:35,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 04:15:35,762 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/const.c[366,379] [2021-05-01 04:15:35,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 04:15:35,778 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 04:15:35,808 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/const.c[366,379] [2021-05-01 04:15:35,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 04:15:35,857 INFO L208 MainTranslator]: Completed translation [2021-05-01 04:15:35,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:15:35 WrapperNode [2021-05-01 04:15:35,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 04:15:35,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 04:15:35,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 04:15:35,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 04:15:35,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:15:35" (1/1) ... [2021-05-01 04:15:35,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:15:35" (1/1) ... [2021-05-01 04:15:35,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:15:35" (1/1) ... [2021-05-01 04:15:35,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:15:35" (1/1) ... [2021-05-01 04:15:35,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:15:35" (1/1) ... [2021-05-01 04:15:35,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:15:35" (1/1) ... [2021-05-01 04:15:35,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:15:35" (1/1) ... [2021-05-01 04:15:35,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 04:15:35,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 04:15:35,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 04:15:35,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 04:15:35,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:15:35" (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 [2021-05-01 04:15:35,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 04:15:35,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 04:15:35,959 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 04:15:35,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 04:15:35,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 04:15:35,959 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 04:15:35,959 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 04:15:35,959 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 04:15:35,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 04:15:35,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-01 04:15:35,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 04:15:35,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 04:15:35,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 04:15:35,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 04:15:35,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 04:15:35,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 04:15:35,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 04:15:35,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 04:15:36,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 04:15:36,169 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 04:15:36,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 04:15:36 BoogieIcfgContainer [2021-05-01 04:15:36,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 04:15:36,171 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-01 04:15:36,171 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-01 04:15:36,172 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-01 04:15:36,174 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 04:15:36" (1/1) ... [2021-05-01 04:15:36,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 04:15:36 BasicIcfg [2021-05-01 04:15:36,184 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-01 04:15:36,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 04:15:36,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 04:15:36,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 04:15:36,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 04:15:35" (1/4) ... [2021-05-01 04:15:36,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a0bdbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 04:15:36, skipping insertion in model container [2021-05-01 04:15:36,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 04:15:35" (2/4) ... [2021-05-01 04:15:36,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a0bdbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 04:15:36, skipping insertion in model container [2021-05-01 04:15:36,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 04:15:36" (3/4) ... [2021-05-01 04:15:36,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a0bdbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 04:15:36, skipping insertion in model container [2021-05-01 04:15:36,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 04:15:36" (4/4) ... [2021-05-01 04:15:36,189 INFO L111 eAbstractionObserver]: Analyzing ICFG const.cJordan [2021-05-01 04:15:36,204 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-01 04:15:36,208 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 04:15:36,231 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 04:15:36,275 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 04:15:36,275 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-01 04:15:36,275 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-01 04:15:36,275 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 04:15:36,275 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 04:15:36,275 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 04:15:36,275 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 04:15:36,275 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 04:15:36,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 04:15:36,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-01 04:15:36,296 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 04:15:36,297 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 04:15:36,297 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 04:15:36,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 04:15:36,314 INFO L82 PathProgramCache]: Analyzing trace with hash -151185397, now seen corresponding path program 1 times [2021-05-01 04:15:36,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 04:15:36,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045629996] [2021-05-01 04:15:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 04:15:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 04:15:36,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:15:36,501 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:15:36,502 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:15:36,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 04:15:36,509 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:15:36,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:15:36,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 04:15:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 04:15:36,559 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:15:36,559 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:15:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 04:15:36,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 04:15:36,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045629996] [2021-05-01 04:15:36,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045629996] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 04:15:36,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 04:15:36,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 04:15:36,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724081642] [2021-05-01 04:15:36,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 04:15:36,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 04:15:36,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 04:15:36,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 04:15:36,587 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 04:15:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 04:15:36,669 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-05-01 04:15:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-01 04:15:36,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 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 13 [2021-05-01 04:15:36,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 04:15:36,676 INFO L225 Difference]: With dead ends: 21 [2021-05-01 04:15:36,676 INFO L226 Difference]: Without dead ends: 16 [2021-05-01 04:15:36,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-01 04:15:36,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-01 04:15:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-01 04:15:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 04:15:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-01 04:15:36,701 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2021-05-01 04:15:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 04:15:36,702 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-01 04:15:36,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 04:15:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-01 04:15:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-01 04:15:36,703 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 04:15:36,703 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 04:15:36,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 04:15:36,703 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 04:15:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 04:15:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash -122556246, now seen corresponding path program 1 times [2021-05-01 04:15:36,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 04:15:36,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372740454] [2021-05-01 04:15:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 04:15:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 04:15:36,742 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:15:36,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:15:36,744 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:15:36,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:15:36,746 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:15:36,746 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 04:15:36,751 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:15:36,752 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 04:15:36,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:15:36,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 04:15:36,763 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:15:36,764 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:15:36,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 04:15:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 04:15:36,800 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 04:15:36,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 04:15:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 04:15:36,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 04:15:36,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372740454] [2021-05-01 04:15:36,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372740454] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 04:15:36,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 04:15:36,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 04:15:36,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114093943] [2021-05-01 04:15:36,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 04:15:36,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 04:15:36,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 04:15:36,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 04:15:36,804 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 04:15:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 04:15:36,920 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-05-01 04:15:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-01 04:15:36,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 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 13 [2021-05-01 04:15:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 04:15:36,921 INFO L225 Difference]: With dead ends: 14 [2021-05-01 04:15:36,921 INFO L226 Difference]: Without dead ends: 0 [2021-05-01 04:15:36,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-01 04:15:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-01 04:15:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-01 04:15:36,922 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) [2021-05-01 04:15:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-01 04:15:36,922 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-05-01 04:15:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 04:15:36,922 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-01 04:15:36,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 04:15:36,922 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-01 04:15:36,923 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-01 04:15:36,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 04:15:36,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 04:15:36 BasicIcfg [2021-05-01 04:15:36,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 04:15:36,927 INFO L168 Benchmark]: Toolchain (without parser) took 1310.31 ms. Allocated memory is still 184.5 MB. Free memory was 149.1 MB in the beginning and 85.8 MB in the end (delta: 63.3 MB). Peak memory consumption was 62.4 MB. Max. memory is 8.0 GB. [2021-05-01 04:15:36,927 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 184.5 MB. Free memory is still 165.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 04:15:36,927 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.60 ms. Allocated memory is still 184.5 MB. Free memory was 148.9 MB in the beginning and 167.6 MB in the end (delta: -18.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. [2021-05-01 04:15:36,928 INFO L168 Benchmark]: Boogie Preprocessor took 32.96 ms. Allocated memory is still 184.5 MB. Free memory was 167.6 MB in the beginning and 166.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 04:15:36,928 INFO L168 Benchmark]: RCFGBuilder took 278.06 ms. Allocated memory is still 184.5 MB. Free memory was 166.0 MB in the beginning and 152.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-01 04:15:36,929 INFO L168 Benchmark]: IcfgTransformer took 13.26 ms. Allocated memory is still 184.5 MB. Free memory was 152.4 MB in the beginning and 151.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 04:15:36,929 INFO L168 Benchmark]: TraceAbstraction took 740.36 ms. Allocated memory is still 184.5 MB. Free memory was 150.8 MB in the beginning and 85.8 MB in the end (delta: 65.0 MB). Peak memory consumption was 65.0 MB. Max. memory is 8.0 GB. [2021-05-01 04:15:36,945 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 184.5 MB. Free memory is still 165.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 240.60 ms. Allocated memory is still 184.5 MB. Free memory was 148.9 MB in the beginning and 167.6 MB in the end (delta: -18.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.96 ms. Allocated memory is still 184.5 MB. Free memory was 167.6 MB in the beginning and 166.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 278.06 ms. Allocated memory is still 184.5 MB. Free memory was 166.0 MB in the beginning and 152.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.26 ms. Allocated memory is still 184.5 MB. Free memory was 152.4 MB in the beginning and 151.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 740.36 ms. Allocated memory is still 184.5 MB. Free memory was 150.8 MB in the beginning and 85.8 MB in the end (delta: 65.0 MB). Peak memory consumption was 65.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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: 650.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.9ms, AutomataDifference: 220.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29 SDtfs, 34 SDslu, 26 SDs, 0 SdLazy, 35 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 196.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13.3ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.1ms SsaConstructionTime, 46.6ms SatisfiabilityAnalysisTime, 230.6ms InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 106 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...