/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/egcd3-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:33:10,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:33:10,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:33:10,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:33:10,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:33:10,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:33:10,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:33:10,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:33:10,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:33:10,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:33:10,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:33:10,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:33:10,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:33:10,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:33:10,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:33:10,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:33:10,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:33:10,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:33:10,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:33:10,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:33:10,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:33:10,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:33:10,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:33:10,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:33:10,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:33:10,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:33:10,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:33:10,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:33:10,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:33:10,456 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:33:10,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:33:10,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:33:10,459 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:33:10,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:33:10,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:33:10,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:33:10,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:33:10,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:33:10,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:33:10,461 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:33:10,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:33:10,462 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:33:10,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:33:10,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:33:10,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:33:10,462 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:33:10,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:33:10,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:10,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:33:10,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:33:10,464 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:33:10,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:33:10,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:33:10,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:33:10,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:33:10,828 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:33:10,829 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:33:10,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2021-05-02 20:33:10,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0f7517d7/4efd94bcf5ca4c2b8bf82d0486cb32b9/FLAG4290ceeb0 [2021-05-02 20:33:11,300 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:33:11,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2021-05-02 20:33:11,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0f7517d7/4efd94bcf5ca4c2b8bf82d0486cb32b9/FLAG4290ceeb0 [2021-05-02 20:33:11,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0f7517d7/4efd94bcf5ca4c2b8bf82d0486cb32b9 [2021-05-02 20:33:11,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:33:11,328 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:33:11,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:11,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:33:11,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:33:11,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:11" (1/1) ... [2021-05-02 20:33:11,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13870dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:11, skipping insertion in model container [2021-05-02 20:33:11,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:11" (1/1) ... [2021-05-02 20:33:11,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:33:11,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:33:11,505 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/egcd3-ll_unwindbound2.c[490,503] [2021-05-02 20:33:11,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:11,529 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:33:11,563 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/egcd3-ll_unwindbound2.c[490,503] [2021-05-02 20:33:11,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:11,598 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:33:11,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:11 WrapperNode [2021-05-02 20:33:11,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:11,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:33:11,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:33:11,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:33:11,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:11" (1/1) ... [2021-05-02 20:33:11,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:11" (1/1) ... [2021-05-02 20:33:11,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:11" (1/1) ... [2021-05-02 20:33:11,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:11" (1/1) ... [2021-05-02 20:33:11,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:11" (1/1) ... [2021-05-02 20:33:11,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:11" (1/1) ... [2021-05-02 20:33:11,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:11" (1/1) ... [2021-05-02 20:33:11,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:33:11,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:33:11,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:33:11,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:33:11,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:11" (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 [2021-05-02 20:33:11,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:33:11,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:33:11,689 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:33:11,689 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:33:11,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:33:11,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:33:11,689 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:33:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:33:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:33:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:33:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:33:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:33:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:33:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:33:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:33:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:33:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:33:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:33:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:33:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:33:12,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:33:12,034 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:33:12,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:12 BoogieIcfgContainer [2021-05-02 20:33:12,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:33:12,036 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:33:12,036 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:33:12,037 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:33:12,039 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:12" (1/1) ... [2021-05-02 20:33:12,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:12 BasicIcfg [2021-05-02 20:33:12,056 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:33:12,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:33:12,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:33:12,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:33:12,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:33:11" (1/4) ... [2021-05-02 20:33:12,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fd712c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:12, skipping insertion in model container [2021-05-02 20:33:12,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:11" (2/4) ... [2021-05-02 20:33:12,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fd712c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:12, skipping insertion in model container [2021-05-02 20:33:12,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:12" (3/4) ... [2021-05-02 20:33:12,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fd712c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:33:12, skipping insertion in model container [2021-05-02 20:33:12,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:12" (4/4) ... [2021-05-02 20:33:12,062 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound2.cJordan [2021-05-02 20:33:12,066 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:33:12,070 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:33:12,083 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:33:12,099 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:33:12,100 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:33:12,100 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:33:12,100 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:33:12,100 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:33:12,100 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:33:12,100 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:33:12,100 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:33:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:33:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:33:12,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:12,117 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:12,117 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:12,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:12,122 INFO L82 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2021-05-02 20:33:12,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:12,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389555175] [2021-05-02 20:33:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:12,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:33:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:12,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:33:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:12,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:33:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:12,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:12,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389555175] [2021-05-02 20:33:12,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389555175] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:12,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:12,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:33:12,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628179153] [2021-05-02 20:33:12,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:33:12,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:12,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:33:12,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:12,374 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:12,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:12,561 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-05-02 20:33:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:33:12,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 [2021-05-02 20:33:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:12,570 INFO L225 Difference]: With dead ends: 41 [2021-05-02 20:33:12,570 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:33:12,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:33:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 20:33:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:33:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-02 20:33:12,601 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-02 20:33:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:12,601 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-02 20:33:12,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:33:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-02 20:33:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:33:12,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:12,603 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] [2021-05-02 20:33:12,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:33:12,603 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:12,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:12,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2021-05-02 20:33:12,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:12,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555624075] [2021-05-02 20:33:12,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:12,619 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:12,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570335738] [2021-05-02 20:33:12,620 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 [2021-05-02 20:33:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:33:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:12,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:12,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:12,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555624075] [2021-05-02 20:33:12,861 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:12,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570335738] [2021-05-02 20:33:12,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570335738] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:12,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:12,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:33:12,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593988190] [2021-05-02 20:33:12,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:33:12,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:12,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:33:12,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:33:12,864 INFO L87 Difference]: Start difference. First operand 35 states and 45 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) [2021-05-02 20:33:12,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:12,882 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-02 20:33:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:33:12,883 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 [2021-05-02 20:33:12,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:12,884 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:33:12,884 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 20:33:12,884 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:33:12,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 20:33:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 20:33:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:33:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-02 20:33:12,891 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-02 20:33:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:12,892 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-02 20:33:12,892 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) [2021-05-02 20:33:12,892 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-02 20:33:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 20:33:12,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:12,893 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, 1] [2021-05-02 20:33:13,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:33:13,105 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:13,106 INFO L82 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2021-05-02 20:33:13,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:13,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350012834] [2021-05-02 20:33:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:13,121 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:13,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275629923] [2021-05-02 20:33:13,121 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 [2021-05-02 20:33:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:13,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:33:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:13,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:33:13,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:13,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350012834] [2021-05-02 20:33:13,348 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:13,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275629923] [2021-05-02 20:33:13,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275629923] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:13,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:13,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:33:13,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859008043] [2021-05-02 20:33:13,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:33:13,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:13,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:33:13,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:13,350 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:33:13,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:13,442 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-05-02 20:33:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:13,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-02 20:33:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:13,444 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:33:13,444 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:33:13,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:33:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-02 20:33:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:33:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-02 20:33:13,452 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-02 20:33:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:13,452 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-02 20:33:13,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:33:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-02 20:33:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:33:13,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:13,453 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] [2021-05-02 20:33:13,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:13,677 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:13,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2021-05-02 20:33:13,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:13,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476663540] [2021-05-02 20:33:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:13,708 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:13,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189064442] [2021-05-02 20:33:13,709 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 [2021-05-02 20:33:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:13,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:33:13,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:13,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:13,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:13,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476663540] [2021-05-02 20:33:13,953 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:13,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189064442] [2021-05-02 20:33:13,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189064442] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:13,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:13,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:33:13,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685694617] [2021-05-02 20:33:13,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:33:13,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:13,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:33:13,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:13,954 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-05-02 20:33:14,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:14,029 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-02 20:33:14,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:33:14,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 29 [2021-05-02 20:33:14,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:14,032 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:33:14,033 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 20:33:14,033 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:14,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 20:33:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 20:33:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:33:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 20:33:14,049 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-02 20:33:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:14,050 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 20:33:14,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-05-02 20:33:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 20:33:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:33:14,051 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:14,052 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, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:14,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:14,265 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:14,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:14,265 INFO L82 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2021-05-02 20:33:14,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:14,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276338691] [2021-05-02 20:33:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:14,285 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:14,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969035211] [2021-05-02 20:33:14,286 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 [2021-05-02 20:33:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:14,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:33:14,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:14,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:33:14,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:14,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276338691] [2021-05-02 20:33:14,545 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:14,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969035211] [2021-05-02 20:33:14,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969035211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:14,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:14,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:33:14,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883082481] [2021-05-02 20:33:14,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:33:14,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:33:14,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:14,548 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-05-02 20:33:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:14,586 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 20:33:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 29 [2021-05-02 20:33:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:14,588 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:33:14,588 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:33:14,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:33:14,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:33:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:33:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-05-02 20:33:14,592 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 29 [2021-05-02 20:33:14,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:14,592 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-05-02 20:33:14,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-05-02 20:33:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-05-02 20:33:14,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 20:33:14,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:14,593 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, 1] [2021-05-02 20:33:14,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:14,809 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:14,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:14,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2021-05-02 20:33:14,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:14,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067543870] [2021-05-02 20:33:14,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:14,827 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:14,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591585668] [2021-05-02 20:33:14,828 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 [2021-05-02 20:33:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:33:14,893 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:33:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:33:14,909 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:33:14,972 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 20:33:14,973 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 20:33:15,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:33:15,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:33:15 BasicIcfg [2021-05-02 20:33:15,208 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:33:15,209 INFO L168 Benchmark]: Toolchain (without parser) took 3881.55 ms. Allocated memory was 183.5 MB in the beginning and 230.7 MB in the end (delta: 47.2 MB). Free memory was 149.0 MB in the beginning and 147.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 48.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:15,209 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 183.5 MB. Free memory was 165.7 MB in the beginning and 165.6 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:33:15,209 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.61 ms. Allocated memory is still 183.5 MB. Free memory was 148.8 MB in the beginning and 166.8 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:15,209 INFO L168 Benchmark]: Boogie Preprocessor took 25.75 ms. Allocated memory is still 183.5 MB. Free memory was 166.8 MB in the beginning and 164.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:15,210 INFO L168 Benchmark]: RCFGBuilder took 409.77 ms. Allocated memory is still 183.5 MB. Free memory was 164.9 MB in the beginning and 147.5 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:15,210 INFO L168 Benchmark]: IcfgTransformer took 19.33 ms. Allocated memory is still 183.5 MB. Free memory was 147.5 MB in the beginning and 146.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:15,210 INFO L168 Benchmark]: TraceAbstraction took 3151.57 ms. Allocated memory was 183.5 MB in the beginning and 230.7 MB in the end (delta: 47.2 MB). Free memory was 145.4 MB in the beginning and 147.9 MB in the end (delta: -2.5 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:33:15,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 183.5 MB. Free memory was 165.7 MB in the beginning and 165.6 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 266.61 ms. Allocated memory is still 183.5 MB. Free memory was 148.8 MB in the beginning and 166.8 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.75 ms. Allocated memory is still 183.5 MB. Free memory was 166.8 MB in the beginning and 164.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 409.77 ms. Allocated memory is still 183.5 MB. Free memory was 164.9 MB in the beginning and 147.5 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.33 ms. Allocated memory is still 183.5 MB. Free memory was 147.5 MB in the beginning and 146.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3151.57 ms. Allocated memory was 183.5 MB in the beginning and 230.7 MB in the end (delta: 47.2 MB). Free memory was 145.4 MB in the beginning and 147.9 MB in the end (delta: -2.5 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=5, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=1, y=2] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=1, y=2] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=1, b=2, counter=0, p=1, q=0, r=0, s=1, x=1, y=2] [L34] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=1, y=2] [L34] COND TRUE counter++<2 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=1, b=2, c=1, counter=1, k=0, p=1, q=0, r=0, s=1, x=1, y=2] [L41] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, c=1, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=1, y=2] [L41] COND TRUE counter++<2 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=1, b=2, c=1, counter=2, k=0, p=1, q=0, r=0, s=1, x=1, y=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, y=2] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, y=2] [L34] COND FALSE !(counter++<2) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3076.5ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 13.1ms, AutomataDifference: 445.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 204 SDtfs, 82 SDslu, 347 SDs, 0 SdLazy, 118 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 271.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 167.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 50.4ms AutomataMinimizationTime, 5 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 77.1ms SsaConstructionTime, 181.6ms SatisfiabilityAnalysisTime, 791.2ms InterpolantComputationTime, 157 NumberOfCodeBlocks, 157 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 291 SizeOfPredicates, 8 NumberOfNonLiveVariables, 583 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 22/22 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...