/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:24:48,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:24:48,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:24:48,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:24:48,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:24:48,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:24:48,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:24:48,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:24:48,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:24:48,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:24:48,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:24:48,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:24:48,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:24:48,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:24:48,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:24:48,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:24:48,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:24:48,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-01 08:24:48,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-01 08:24:48,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-01 08:24:48,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-01 08:24:48,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-01 08:24:48,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-01 08:24:48,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-01 08:24:48,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-01 08:24:48,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:24:48,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:24:48,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:24:48,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:24:48,551 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:24:48,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:24:48,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:24:48,557 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:24:48,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:24:48,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:24:48,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:24:48,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:24:48,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:24:48,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:24:48,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:24:48,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:24:48,559 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:24:48,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:24:48,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:24:48,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:24:48,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:24:48,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:24:48,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:24:48,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:24:48,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:24:48,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:24:48,562 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:24:48,562 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:24:48,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:24:48,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:24:48,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:24:49,001 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:24:49,003 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:24:49,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound2.c [2021-05-01 08:24:49,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d22a1572d/5141db7e4a6e49a8a41e67216f070933/FLAGcd0d79adc [2021-05-01 08:24:49,808 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:24:49,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound2.c [2021-05-01 08:24:49,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d22a1572d/5141db7e4a6e49a8a41e67216f070933/FLAGcd0d79adc [2021-05-01 08:24:50,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d22a1572d/5141db7e4a6e49a8a41e67216f070933 [2021-05-01 08:24:50,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:24:50,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:24:50,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:50,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:24:50,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:24:50,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:50" (1/1) ... [2021-05-01 08:24:50,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6134dbda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:50, skipping insertion in model container [2021-05-01 08:24:50,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:50" (1/1) ... [2021-05-01 08:24:50,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:24:50,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:24:50,419 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/prod4br-ll_valuebound2.c[524,537] [2021-05-01 08:24:50,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:50,470 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:24:50,492 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/prod4br-ll_valuebound2.c[524,537] [2021-05-01 08:24:50,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:24:50,559 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:24:50,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:50 WrapperNode [2021-05-01 08:24:50,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:24:50,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:24:50,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:24:50,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:24:50,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:50" (1/1) ... [2021-05-01 08:24:50,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:50" (1/1) ... [2021-05-01 08:24:50,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:50" (1/1) ... [2021-05-01 08:24:50,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:50" (1/1) ... [2021-05-01 08:24:50,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:50" (1/1) ... [2021-05-01 08:24:50,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:50" (1/1) ... [2021-05-01 08:24:50,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:50" (1/1) ... [2021-05-01 08:24:50,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:24:50,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:24:50,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:24:50,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:24:50,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:50" (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 08:24:50,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:24:50,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:24:50,786 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:24:50,786 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:24:50,786 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:24:50,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:24:50,787 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:24:50,787 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:24:50,788 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:24:50,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:24:50,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 08:24:50,789 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:24:50,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:24:50,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:24:50,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:24:50,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:24:50,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:24:50,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:24:50,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:24:50,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:24:51,269 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:24:51,269 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:24:51,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:51 BoogieIcfgContainer [2021-05-01 08:24:51,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:24:51,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:24:51,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:24:51,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:24:51,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:24:50" (1/3) ... [2021-05-01 08:24:51,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d3e3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:51, skipping insertion in model container [2021-05-01 08:24:51,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:50" (2/3) ... [2021-05-01 08:24:51,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d3e3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:51, skipping insertion in model container [2021-05-01 08:24:51,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:51" (3/3) ... [2021-05-01 08:24:51,283 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound2.c [2021-05-01 08:24:51,291 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:24:51,298 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:24:51,329 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:24:51,370 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:24:51,370 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:24:51,370 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:24:51,371 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:24:51,371 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:24:51,371 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:24:51,371 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:24:51,371 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:24:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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) [2021-05-01 08:24:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-01 08:24:51,407 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:51,408 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:24:51,409 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:51,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 1 times [2021-05-01 08:24:51,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:51,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052873567] [2021-05-01 08:24:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:51,521 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:51,717 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:51,719 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:51,722 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:51,723 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:51,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:24:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:51,803 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:51,804 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:51,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:24:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:51,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:51,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:51,816 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:51,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:51,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:24:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:51,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:51,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:51,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:51,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:51,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:24:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:24:51,834 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:51,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:51,838 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:24:51,839 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:24:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-01 08:24:51,843 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:24:51,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052873567] [2021-05-01 08:24:51,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1052873567] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:24:51,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:24:51,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:24:51,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093395412] [2021-05-01 08:24:51,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:24:51,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:24:51,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:24:51,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:51,876 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-01 08:24:52,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:24:52,051 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2021-05-01 08:24:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:24:52,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-01 08:24:52,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:24:52,074 INFO L225 Difference]: With dead ends: 61 [2021-05-01 08:24:52,074 INFO L226 Difference]: Without dead ends: 29 [2021-05-01 08:24:52,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:24:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-01 08:24:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-01 08:24:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 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) [2021-05-01 08:24:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-05-01 08:24:52,181 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 28 [2021-05-01 08:24:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:24:52,182 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-05-01 08:24:52,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-01 08:24:52,183 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-05-01 08:24:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-01 08:24:52,185 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:24:52,185 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:24:52,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:24:52,186 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:24:52,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:24:52,187 INFO L82 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 1 times [2021-05-01 08:24:52,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:24:52,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635380417] [2021-05-01 08:24:52,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:24:52,192 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:24:52,214 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:24:52,215 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:24:52,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:24:52,239 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:24:52,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:24:52 BoogieIcfgContainer [2021-05-01 08:24:52,240 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:24:52,242 INFO L168 Benchmark]: Toolchain (without parser) took 2067.14 ms. Allocated memory is still 188.7 MB. Free memory was 154.3 MB in the beginning and 162.1 MB in the end (delta: -7.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:52,243 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 188.7 MB. Free memory is still 170.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:52,243 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.16 ms. Allocated memory is still 188.7 MB. Free memory was 154.2 MB in the beginning and 144.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:52,244 INFO L168 Benchmark]: Boogie Preprocessor took 114.50 ms. Allocated memory is still 188.7 MB. Free memory was 144.2 MB in the beginning and 171.5 MB in the end (delta: -27.3 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:52,245 INFO L168 Benchmark]: RCFGBuilder took 593.13 ms. Allocated memory is still 188.7 MB. Free memory was 171.5 MB in the beginning and 155.4 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:24:52,246 INFO L168 Benchmark]: TraceAbstraction took 966.16 ms. Allocated memory is still 188.7 MB. Free memory was 155.0 MB in the beginning and 162.1 MB in the end (delta: -7.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:24:52,251 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 188.7 MB. Free memory is still 170.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 378.16 ms. Allocated memory is still 188.7 MB. Free memory was 154.2 MB in the beginning and 144.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 114.50 ms. Allocated memory is still 188.7 MB. Free memory was 144.2 MB in the beginning and 171.5 MB in the end (delta: -27.3 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 593.13 ms. Allocated memory is still 188.7 MB. Free memory was 171.5 MB in the beginning and 155.4 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 966.16 ms. Allocated memory is still 188.7 MB. Free memory was 155.0 MB in the beginning and 162.1 MB in the end (delta: -7.1 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int x, y; [L21] long long a, b, p, q; [L23] x = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x>=0 && x<=2) [L9] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x>=0 && x<=2) [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y>=0 && y<=2) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y>=0 && y<=2) [L27] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(y >= 1) [L29] a = x [L30] b = y [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 854.3ms, OverallIterations: 2, TraceHistogramMax: 3, EmptinessCheckTime: 20.0ms, AutomataDifference: 223.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 22 SDslu, 3 SDs, 0 SdLazy, 9 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 80.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...