/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/bresenham-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:30:45,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:30:45,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:30:45,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:30:45,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:30:45,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:30:45,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:30:46,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:30:46,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:30:46,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:30:46,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:30:46,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:30:46,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:30:46,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:30:46,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:30:46,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:30:46,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:30:46,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:30:46,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:30:46,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:30:46,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:30:46,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:30:46,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:30:46,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:30:46,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:30:46,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:30:46,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:30:46,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:30:46,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:30:46,036 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:30:46,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:30:46,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:30:46,038 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:30:46,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:30:46,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:30:46,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:30:46,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:30:46,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:30:46,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:30:46,039 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:30:46,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:30:46,039 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:30:46,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:30:46,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:30:46,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:30:46,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:30:46,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:30:46,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:30:46,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:30:46,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:30:46,041 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:30:46,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:30:46,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:30:46,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:30:46,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:30:46,332 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:30:46,333 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:30:46,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2021-05-02 19:30:46,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab3a15cff/015ccf93027d48e6a1687e71cf5d2591/FLAGa698a15f0 [2021-05-02 19:30:46,753 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:30:46,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2021-05-02 19:30:46,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab3a15cff/015ccf93027d48e6a1687e71cf5d2591/FLAGa698a15f0 [2021-05-02 19:30:46,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab3a15cff/015ccf93027d48e6a1687e71cf5d2591 [2021-05-02 19:30:46,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:30:46,775 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:30:46,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:30:46,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:30:46,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:30:46,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:30:46" (1/1) ... [2021-05-02 19:30:46,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@216f870c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:46, skipping insertion in model container [2021-05-02 19:30:46,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:30:46" (1/1) ... [2021-05-02 19:30:46,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:30:46,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:30:46,921 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/bresenham-ll_valuebound50.c[597,610] [2021-05-02 19:30:46,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:30:46,949 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:30:46,997 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/bresenham-ll_valuebound50.c[597,610] [2021-05-02 19:30:47,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:30:47,023 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:30:47,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:47 WrapperNode [2021-05-02 19:30:47,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:30:47,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:30:47,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:30:47,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:30:47,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:47" (1/1) ... [2021-05-02 19:30:47,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:47" (1/1) ... [2021-05-02 19:30:47,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:47" (1/1) ... [2021-05-02 19:30:47,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:47" (1/1) ... [2021-05-02 19:30:47,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:47" (1/1) ... [2021-05-02 19:30:47,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:47" (1/1) ... [2021-05-02 19:30:47,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:47" (1/1) ... [2021-05-02 19:30:47,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:30:47,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:30:47,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:30:47,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:30:47,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:47" (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 19:30:47,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:30:47,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:30:47,132 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:30:47,132 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:30:47,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:30:47,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:30:47,132 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:30:47,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:30:47,133 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:30:47,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:30:47,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:30:47,133 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:30:47,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:30:47,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:30:47,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:30:47,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:30:47,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:30:47,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:30:47,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:30:47,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:30:47,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:30:47,364 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:30:47,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:47 BoogieIcfgContainer [2021-05-02 19:30:47,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:30:47,366 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:30:47,366 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:30:47,366 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:30:47,368 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:47" (1/1) ... [2021-05-02 19:30:47,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:30:47 BasicIcfg [2021-05-02 19:30:47,400 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:30:47,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:30:47,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:30:47,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:30:47,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:30:46" (1/4) ... [2021-05-02 19:30:47,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2c1fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:30:47, skipping insertion in model container [2021-05-02 19:30:47,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:47" (2/4) ... [2021-05-02 19:30:47,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2c1fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:30:47, skipping insertion in model container [2021-05-02 19:30:47,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:47" (3/4) ... [2021-05-02 19:30:47,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2c1fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:30:47, skipping insertion in model container [2021-05-02 19:30:47,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:30:47" (4/4) ... [2021-05-02 19:30:47,405 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound50.cJordan [2021-05-02 19:30:47,408 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:30:47,411 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:30:47,431 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:30:47,451 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:30:47,451 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:30:47,451 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:30:47,451 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:30:47,451 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:30:47,451 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:30:47,451 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:30:47,451 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:30:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:30:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:30:47,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:47,470 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 19:30:47,470 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:47,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2021-05-02 19:30:47,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:47,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797901042] [2021-05-02 19:30:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:47,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:30:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:47,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:30:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:47,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 19:30:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:47,676 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 19:30:47,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:47,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797901042] [2021-05-02 19:30:47,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797901042] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:30:47,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:30:47,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:30:47,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834289316] [2021-05-02 19:30:47,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:30:47,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:47,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:30:47,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:30:47,690 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (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 19:30:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:47,747 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-02 19:30:47,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:30:47,748 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, (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 23 [2021-05-02 19:30:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:47,752 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:30:47,753 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 19:30:47,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:30:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 19:30:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 19:30:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:30:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 19:30:47,779 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-05-02 19:30:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:47,779 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 19:30:47,780 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, (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 19:30:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 19:30:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:30:47,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:47,781 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 19:30:47,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:30:47,782 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:47,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2021-05-02 19:30:47,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:47,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127294376] [2021-05-02 19:30:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:47,811 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:47,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845566198] [2021-05-02 19:30:47,812 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 19:30:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:47,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:30:47,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:47,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:47,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:48,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:48,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:30:48,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:48,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127294376] [2021-05-02 19:30:48,113 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:48,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845566198] [2021-05-02 19:30:48,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845566198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:48,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:48,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:30:48,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244004578] [2021-05-02 19:30:48,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:30:48,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:48,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:30:48,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:30:48,115 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:30:48,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:48,242 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 19:30:48,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:30:48,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 19:30:48,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:48,245 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:30:48,246 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:30:48,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:30:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:30:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 19:30:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:30:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 19:30:48,257 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2021-05-02 19:30:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:48,258 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 19:30:48,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:30:48,264 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 19:30:48,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:30:48,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:48,265 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:48,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:30:48,466 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:48,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:48,467 INFO L82 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2021-05-02 19:30:48,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:48,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127457691] [2021-05-02 19:30:48,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:48,480 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:48,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092678023] [2021-05-02 19:30:48,481 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 19:30:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:48,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:30:48,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:48,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:48,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:48,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:48,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:48,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:48,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:30:48,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:48,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127457691] [2021-05-02 19:30:48,751 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:48,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092678023] [2021-05-02 19:30:48,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092678023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:48,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:48,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:30:48,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406101629] [2021-05-02 19:30:48,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:30:48,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:48,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:30:48,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:30:48,752 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:30:48,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:48,880 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-05-02 19:30:48,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:30:48,881 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 19:30:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:48,882 INFO L225 Difference]: With dead ends: 46 [2021-05-02 19:30:48,882 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 19:30:48,883 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:30:48,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 19:30:48,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 19:30:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:30:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 19:30:48,893 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2021-05-02 19:30:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:48,893 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 19:30:48,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:30:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 19:30:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:30:48,895 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:48,895 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:49,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:49,102 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:49,102 INFO L82 PathProgramCache]: Analyzing trace with hash 241495552, now seen corresponding path program 1 times [2021-05-02 19:30:49,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:49,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500100992] [2021-05-02 19:30:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:49,111 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:49,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428328773] [2021-05-02 19:30:49,112 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 19:30:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 19:30:49,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:49,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:49,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:49,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:49,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:49,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:49,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:30:49,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:49,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500100992] [2021-05-02 19:30:49,326 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:49,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428328773] [2021-05-02 19:30:49,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428328773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:49,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:49,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:30:49,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90586076] [2021-05-02 19:30:49,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:30:49,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:49,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:30:49,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:30:49,328 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:30:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:49,478 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-02 19:30:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:30:49,479 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 19:30:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:49,479 INFO L225 Difference]: With dead ends: 54 [2021-05-02 19:30:49,479 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 19:30:49,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:30:49,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 19:30:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-02 19:30:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:30:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-05-02 19:30:49,483 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2021-05-02 19:30:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:49,483 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-05-02 19:30:49,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:30:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-05-02 19:30:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 19:30:49,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:49,484 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:49,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:49,705 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:49,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:49,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2021-05-02 19:30:49,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:49,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762675482] [2021-05-02 19:30:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:49,716 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:49,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190398679] [2021-05-02 19:30:49,717 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 19:30:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:49,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 19:30:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:49,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:49,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:49,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:49,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:49,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:50,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:50,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:50,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 19:30:50,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:50,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762675482] [2021-05-02 19:30:50,084 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:50,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190398679] [2021-05-02 19:30:50,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190398679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:50,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:50,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:30:50,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256979598] [2021-05-02 19:30:50,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:30:50,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:50,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:30:50,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:30:50,085 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:30:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:50,329 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-05-02 19:30:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:30:50,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2021-05-02 19:30:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:50,333 INFO L225 Difference]: With dead ends: 59 [2021-05-02 19:30:50,333 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 19:30:50,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-02 19:30:50,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 19:30:50,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2021-05-02 19:30:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:30:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 19:30:50,344 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2021-05-02 19:30:50,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:50,345 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 19:30:50,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:30:50,345 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 19:30:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 19:30:50,346 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:50,346 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:50,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:50,562 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:50,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:50,563 INFO L82 PathProgramCache]: Analyzing trace with hash 718222219, now seen corresponding path program 2 times [2021-05-02 19:30:50,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:50,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208595458] [2021-05-02 19:30:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:50,571 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:50,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317384516] [2021-05-02 19:30:50,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:30:50,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:30:50,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:30:50,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 19:30:50,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:50,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:50,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:50,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:50,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:50,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:51,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:51,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:51,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:51,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:51,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:51,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:51,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:51,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:51,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:51,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:51,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 19:30:51,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:51,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208595458] [2021-05-02 19:30:51,200 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:51,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317384516] [2021-05-02 19:30:51,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317384516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:51,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:51,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 19:30:51,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624183024] [2021-05-02 19:30:51,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:30:51,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:51,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:30:51,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:30:51,201 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:30:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:51,991 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-05-02 19:30:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:30:51,992 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 19:30:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:51,992 INFO L225 Difference]: With dead ends: 54 [2021-05-02 19:30:51,992 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:30:51,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 480.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:30:51,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:30:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:30:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:30:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:30:51,993 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-05-02 19:30:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:51,993 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:30:51,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:30:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:30:51,993 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:30:52,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 19:30:52,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:30:52 BasicIcfg [2021-05-02 19:30:52,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:30:52,198 INFO L168 Benchmark]: Toolchain (without parser) took 5423.05 ms. Allocated memory was 215.0 MB in the beginning and 269.5 MB in the end (delta: 54.5 MB). Free memory was 179.4 MB in the beginning and 97.5 MB in the end (delta: 81.9 MB). Peak memory consumption was 136.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:52,198 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 215.0 MB. Free memory is still 196.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:30:52,198 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.21 ms. Allocated memory is still 215.0 MB. Free memory was 179.4 MB in the beginning and 197.7 MB in the end (delta: -18.3 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:52,198 INFO L168 Benchmark]: Boogie Preprocessor took 36.87 ms. Allocated memory is still 215.0 MB. Free memory was 197.7 MB in the beginning and 196.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:52,198 INFO L168 Benchmark]: RCFGBuilder took 303.19 ms. Allocated memory is still 215.0 MB. Free memory was 196.2 MB in the beginning and 180.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:52,199 INFO L168 Benchmark]: IcfgTransformer took 34.23 ms. Allocated memory is still 215.0 MB. Free memory was 180.4 MB in the beginning and 178.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:52,199 INFO L168 Benchmark]: TraceAbstraction took 4796.85 ms. Allocated memory was 215.0 MB in the beginning and 269.5 MB in the end (delta: 54.5 MB). Free memory was 178.3 MB in the beginning and 97.5 MB in the end (delta: 80.8 MB). Peak memory consumption was 136.4 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:52,199 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 215.0 MB. Free memory is still 196.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.21 ms. Allocated memory is still 215.0 MB. Free memory was 179.4 MB in the beginning and 197.7 MB in the end (delta: -18.3 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.87 ms. Allocated memory is still 215.0 MB. Free memory was 197.7 MB in the beginning and 196.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 303.19 ms. Allocated memory is still 215.0 MB. Free memory was 196.2 MB in the beginning and 180.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 34.23 ms. Allocated memory is still 215.0 MB. Free memory was 180.4 MB in the beginning and 178.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4796.85 ms. Allocated memory was 215.0 MB in the beginning and 269.5 MB in the end (delta: 54.5 MB). Free memory was 178.3 MB in the beginning and 97.5 MB in the end (delta: 80.8 MB). Peak memory consumption was 136.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4745.5ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 15.6ms, AutomataDifference: 1527.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 130 SDtfs, 148 SDslu, 631 SDs, 0 SdLazy, 1022 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 927.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1108.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 47.6ms AutomataMinimizationTime, 6 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 58.6ms SsaConstructionTime, 125.9ms SatisfiabilityAnalysisTime, 1621.3ms InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 1206 SizeOfPredicates, 27 NumberOfNonLiveVariables, 703 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 27/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...