/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/fermat2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:45:57,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:45:57,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:45:57,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:45:57,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:45:57,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:45:57,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:45:57,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:45:57,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:45:57,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:45:57,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:45:57,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:45:57,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:45:57,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:45:57,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:45:57,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:45:57,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:45:57,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:45:57,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:45:57,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:45:57,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:45:57,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:45:57,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:45:57,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:45:57,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:45:57,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:45:57,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:45:57,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:45:57,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:45:57,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:45:57,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:45:57,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:45:57,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:45:57,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:45:57,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:45:57,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:45:57,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:45:57,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:45:57,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:45:57,289 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:45:57,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:45:57,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:45:57,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:45:57,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:45:57,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:45:57,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:45:57,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:45:57,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:45:57,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:45:57,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:45:57,292 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:45:57,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:45:57,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:45:57,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:45:57,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:45:57,641 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:45:57,642 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:45:57,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound100.c [2021-05-02 20:45:57,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/109057dad/2cf9c11558ba46a98f1de33016f39d64/FLAGe79e3e5ac [2021-05-02 20:45:58,143 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:45:58,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound100.c [2021-05-02 20:45:58,151 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/109057dad/2cf9c11558ba46a98f1de33016f39d64/FLAGe79e3e5ac [2021-05-02 20:45:58,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/109057dad/2cf9c11558ba46a98f1de33016f39d64 [2021-05-02 20:45:58,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:45:58,451 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:45:58,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:45:58,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:45:58,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:45:58,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:45:58" (1/1) ... [2021-05-02 20:45:58,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1878c3b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:58, skipping insertion in model container [2021-05-02 20:45:58,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:45:58" (1/1) ... [2021-05-02 20:45:58,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:45:58,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:45:58,572 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/fermat2-ll_valuebound100.c[524,537] [2021-05-02 20:45:58,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:45:58,598 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:45:58,613 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/fermat2-ll_valuebound100.c[524,537] [2021-05-02 20:45:58,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:45:58,649 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:45:58,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:58 WrapperNode [2021-05-02 20:45:58,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:45:58,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:45:58,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:45:58,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:45:58,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:58" (1/1) ... [2021-05-02 20:45:58,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:58" (1/1) ... [2021-05-02 20:45:58,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:58" (1/1) ... [2021-05-02 20:45:58,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:58" (1/1) ... [2021-05-02 20:45:58,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:58" (1/1) ... [2021-05-02 20:45:58,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:58" (1/1) ... [2021-05-02 20:45:58,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:58" (1/1) ... [2021-05-02 20:45:58,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:45:58,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:45:58,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:45:58,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:45:58,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:58" (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 20:45:58,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:45:58,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:45:58,811 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:45:58,811 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:45:58,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:45:58,812 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:45:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:45:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:45:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:45:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:45:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:45:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:45:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:45:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:45:58,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:45:58,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:45:58,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:45:58,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:45:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:45:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:45:59,015 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:45:59,016 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:45:59,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:45:59 BoogieIcfgContainer [2021-05-02 20:45:59,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:45:59,018 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:45:59,018 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:45:59,018 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:45:59,020 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:45:59" (1/1) ... [2021-05-02 20:45:59,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:45:59 BasicIcfg [2021-05-02 20:45:59,035 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:45:59,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:45:59,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:45:59,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:45:59,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:45:58" (1/4) ... [2021-05-02 20:45:59,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3b804f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:45:59, skipping insertion in model container [2021-05-02 20:45:59,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:58" (2/4) ... [2021-05-02 20:45:59,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3b804f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:45:59, skipping insertion in model container [2021-05-02 20:45:59,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:45:59" (3/4) ... [2021-05-02 20:45:59,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3b804f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:45:59, skipping insertion in model container [2021-05-02 20:45:59,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:45:59" (4/4) ... [2021-05-02 20:45:59,041 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound100.cJordan [2021-05-02 20:45:59,045 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:45:59,048 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:45:59,061 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:45:59,075 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:45:59,075 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:45:59,075 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:45:59,075 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:45:59,075 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:45:59,075 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:45:59,075 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:45:59,075 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:45:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:45:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:45:59,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:59,091 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:59,092 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:59,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1450325676, now seen corresponding path program 1 times [2021-05-02 20:45:59,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:59,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253976455] [2021-05-02 20:45:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:59,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:45:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:59,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:45:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:59,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:45:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:59,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:45:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:59,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:45:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:45:59,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:59,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253976455] [2021-05-02 20:45:59,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253976455] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:45:59,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:45:59,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:45:59,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806094830] [2021-05-02 20:45:59,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:45:59,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:59,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:45:59,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:45:59,369 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:45:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:59,459 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-02 20:45:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:45:59,461 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:45:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:59,468 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:45:59,468 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:45:59,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:45:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:45:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:45:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:45:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-05-02 20:45:59,506 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-05-02 20:45:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:59,506 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-05-02 20:45:59,507 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:45:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-05-02 20:45:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:45:59,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:59,509 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:59,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:45:59,509 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:59,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:59,510 INFO L82 PathProgramCache]: Analyzing trace with hash 512475503, now seen corresponding path program 1 times [2021-05-02 20:45:59,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:59,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533765265] [2021-05-02 20:45:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:59,559 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:59,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648840814] [2021-05-02 20:45:59,559 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 20:45:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:59,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:45:59,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:59,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:59,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:59,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:59,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:59,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:59,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:59,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:59,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:46:00,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:00,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533765265] [2021-05-02 20:46:00,038 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:46:00,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648840814] [2021-05-02 20:46:00,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648840814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:46:00,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:46:00,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:46:00,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644221985] [2021-05-02 20:46:00,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:46:00,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:00,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:46:00,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:46:00,041 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:46:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:46:00,208 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-05-02 20:46:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:46:00,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:46:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:46:00,210 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:46:00,210 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:46:00,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:46:00,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:46:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 20:46:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:46:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 20:46:00,216 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 33 [2021-05-02 20:46:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:46:00,217 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 20:46:00,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:46:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 20:46:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:46:00,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:46:00,219 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:46:00,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:46:00,440 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:46:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:46:00,440 INFO L82 PathProgramCache]: Analyzing trace with hash -397056057, now seen corresponding path program 1 times [2021-05-02 20:46:00,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:46:00,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606617066] [2021-05-02 20:46:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:46:00,450 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:46:00,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915605632] [2021-05-02 20:46:00,450 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 20:46:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:46:00,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:46:00,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:00,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:00,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:00,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:00,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:00,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:00,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:00,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:00,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:00,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:46:00,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:00,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606617066] [2021-05-02 20:46:00,781 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:46:00,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915605632] [2021-05-02 20:46:00,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915605632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:46:00,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:46:00,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:46:00,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26964458] [2021-05-02 20:46:00,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:46:00,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:00,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:46:00,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:46:00,783 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:46:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:46:15,112 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-05-02 20:46:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:46:15,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 20:46:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:46:15,115 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:46:15,115 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 20:46:15,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:46:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 20:46:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 20:46:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:46:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 20:46:15,122 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 39 [2021-05-02 20:46:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:46:15,122 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 20:46:15,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:46:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 20:46:15,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:46:15,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:46:15,124 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 20:46:15,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:46:15,341 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:46:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:46:15,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1822507357, now seen corresponding path program 1 times [2021-05-02 20:46:15,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:46:15,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056393346] [2021-05-02 20:46:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:46:15,368 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:46:15,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352515097] [2021-05-02 20:46:15,368 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 20:46:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:15,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:46:15,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:46:15,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:15,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:15,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:15,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:15,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:15,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:15,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:15,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:15,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:15,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:46:15,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:15,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056393346] [2021-05-02 20:46:15,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:46:15,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352515097] [2021-05-02 20:46:15,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352515097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:46:15,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:46:15,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:46:15,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995172854] [2021-05-02 20:46:15,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:46:15,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:15,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:46:15,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:46:15,740 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:46:24,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:46:24,184 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-05-02 20:46:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:46:24,184 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 20:46:24,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:46:24,186 INFO L225 Difference]: With dead ends: 61 [2021-05-02 20:46:24,186 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 20:46:24,186 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:46:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 20:46:24,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-05-02 20:46:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 40 states have internal predecessors, (49), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:46:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-05-02 20:46:24,194 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 41 [2021-05-02 20:46:24,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:46:24,194 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-05-02 20:46:24,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:46:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-05-02 20:46:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:46:24,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:46:24,196 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:46:24,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:46:24,419 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:46:24,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:46:24,419 INFO L82 PathProgramCache]: Analyzing trace with hash -3382636, now seen corresponding path program 1 times [2021-05-02 20:46:24,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:46:24,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530026679] [2021-05-02 20:46:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:46:24,430 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:46:24,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625577072] [2021-05-02 20:46:24,430 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 20:46:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:24,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:46:24,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:46:24,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 20:46:24,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:24,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530026679] [2021-05-02 20:46:24,732 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:46:24,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625577072] [2021-05-02 20:46:24,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625577072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:46:24,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:46:24,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:46:24,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289993791] [2021-05-02 20:46:24,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:46:24,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:24,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:46:24,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:46:24,734 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:46:36,606 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 20:46:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:46:36,631 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2021-05-02 20:46:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:46:36,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-02 20:46:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:46:36,633 INFO L225 Difference]: With dead ends: 63 [2021-05-02 20:46:36,633 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:46:36,633 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 4273.9ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:46:36,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:46:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2021-05-02 20:46:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:46:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-05-02 20:46:36,639 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 47 [2021-05-02 20:46:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:46:36,640 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-05-02 20:46:36,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:46:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-05-02 20:46:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:46:36,641 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:46:36,641 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:46:36,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:46:36,847 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:46:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:46:36,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1603865781, now seen corresponding path program 2 times [2021-05-02 20:46:36,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:46:36,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632612441] [2021-05-02 20:46:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:46:36,863 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:46:36,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657722] [2021-05-02 20:46:36,863 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 20:46:36,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:46:36,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:46:36,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:46:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:46:36,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:36,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:36,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:36,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:36,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:36,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:37,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:37,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:37,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:37,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:37,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:37,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:46:37,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:37,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632612441] [2021-05-02 20:46:37,246 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:46:37,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657722] [2021-05-02 20:46:37,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:46:37,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:46:37,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:46:37,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530390695] [2021-05-02 20:46:37,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:46:37,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:37,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:46:37,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:46:37,247 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:46:43,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:46:43,960 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-02 20:46:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:46:43,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2021-05-02 20:46:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:46:43,963 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:46:43,963 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:46:43,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:46:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:46:43,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-05-02 20:46:43,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:46:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-05-02 20:46:43,968 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 49 [2021-05-02 20:46:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:46:43,968 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-05-02 20:46:43,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:46:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-05-02 20:46:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 20:46:43,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:46:43,969 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:46:44,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:46:44,190 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:46:44,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:46:44,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1737152313, now seen corresponding path program 3 times [2021-05-02 20:46:44,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:46:44,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69867334] [2021-05-02 20:46:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:46:44,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:46:44,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079726077] [2021-05-02 20:46:44,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:46:44,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:46:44,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:46:44,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:46:44,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:46:44,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:44,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-02 20:46:44,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:44,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69867334] [2021-05-02 20:46:44,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:46:44,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079726077] [2021-05-02 20:46:44,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079726077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:46:44,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:46:44,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:46:44,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546514278] [2021-05-02 20:46:44,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:46:44,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:44,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:46:44,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:46:44,400 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 20:46:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:46:53,070 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-05-02 20:46:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:46:53,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2021-05-02 20:46:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:46:53,072 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:46:53,072 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:46:53,072 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:46:53,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:46:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2021-05-02 20:46:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:46:53,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-05-02 20:46:53,077 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 57 [2021-05-02 20:46:53,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:46:53,077 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-05-02 20:46:53,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 20:46:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-05-02 20:46:53,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 20:46:53,078 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:46:53,078 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:46:53,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:46:53,289 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:46:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:46:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash -479214138, now seen corresponding path program 1 times [2021-05-02 20:46:53,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:46:53,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082247034] [2021-05-02 20:46:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:46:53,298 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:46:53,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072620348] [2021-05-02 20:46:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:46:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:53,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 20:46:53,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:46:53,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:53,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:53,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:53,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:53,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:53,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:53,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:53,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:09,640 WARN L205 SmtUtils]: Spent 14.04 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:47:15,678 WARN L205 SmtUtils]: Spent 5.96 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:47:15,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:15,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,860 WARN L205 SmtUtils]: Spent 17.93 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 20:47:35,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:35,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:47,564 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:48:07,185 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:48:07,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:07,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 39 refuted. 6 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 20:48:07,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:48:07,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082247034] [2021-05-02 20:48:07,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:48:07,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072620348] [2021-05-02 20:48:07,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072620348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:48:07,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:48:07,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:48:07,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887930286] [2021-05-02 20:48:07,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:48:07,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:48:07,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:48:07,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=162, Unknown=9, NotChecked=0, Total=210 [2021-05-02 20:48:07,257 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:48:41,438 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 20:48:52,243 WARN L205 SmtUtils]: Spent 10.07 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 20:49:13,198 WARN L205 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 20:50:19,724 WARN L205 SmtUtils]: Spent 8.11 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 20:50:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:35,252 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2021-05-02 20:50:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:50:35,255 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 65 [2021-05-02 20:50:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:35,256 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:50:35,256 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 20:50:35,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 114591.6ms TimeCoverageRelationStatistics Valid=84, Invalid=364, Unknown=14, NotChecked=0, Total=462 [2021-05-02 20:50:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 20:50:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-05-02 20:50:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 54 states have internal predecessors, (58), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:50:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2021-05-02 20:50:35,263 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 65 [2021-05-02 20:50:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:35,264 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2021-05-02 20:50:35,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:50:35,264 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2021-05-02 20:50:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:50:35,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:35,265 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:35,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:35,477 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:35,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2076715181, now seen corresponding path program 2 times [2021-05-02 20:50:35,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:35,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702149508] [2021-05-02 20:50:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:35,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:35,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453451203] [2021-05-02 20:50:35,486 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:35,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:50:35,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:50:35,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 20:50:35,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:35,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 20:50:35,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:35,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702149508] [2021-05-02 20:50:35,909 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:35,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453451203] [2021-05-02 20:50:35,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453451203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:35,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:35,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:50:35,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228939632] [2021-05-02 20:50:35,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:50:35,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:35,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:50:35,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:50:35,911 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 20:50:36,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:36,305 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2021-05-02 20:50:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:50:36,306 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 73 [2021-05-02 20:50:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:36,307 INFO L225 Difference]: With dead ends: 100 [2021-05-02 20:50:36,307 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 20:50:36,308 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:50:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 20:50:36,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-02 20:50:36,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 72 states have internal predecessors, (80), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 20:50:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-05-02 20:50:36,315 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 73 [2021-05-02 20:50:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:36,315 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-05-02 20:50:36,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 20:50:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-05-02 20:50:36,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:50:36,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:36,317 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:36,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:50:36,543 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:36,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:36,544 INFO L82 PathProgramCache]: Analyzing trace with hash 685754451, now seen corresponding path program 3 times [2021-05-02 20:50:36,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:36,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561284643] [2021-05-02 20:50:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:36,552 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:36,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772019724] [2021-05-02 20:50:36,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:36,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:50:36,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:50:36,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:50:36,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:36,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:36,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:36,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:36,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:36,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:36,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:36,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:36,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:36,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:36,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:36,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:36,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:50:36,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:36,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561284643] [2021-05-02 20:50:36,947 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:36,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772019724] [2021-05-02 20:50:36,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772019724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:36,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:36,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:50:36,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085740462] [2021-05-02 20:50:36,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:50:36,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:36,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:50:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:50:36,950 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:50:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:47,254 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-05-02 20:50:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:50:47,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-05-02 20:50:47,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:47,255 INFO L225 Difference]: With dead ends: 112 [2021-05-02 20:50:47,255 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:50:47,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:50:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:50:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:50:47,256 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 20:50:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:50:47,256 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-05-02 20:50:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:47,256 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:50:47,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:50:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:50:47,256 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:50:47,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:47,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:50:47 BasicIcfg [2021-05-02 20:50:47,460 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:50:47,460 INFO L168 Benchmark]: Toolchain (without parser) took 289009.60 ms. Allocated memory was 183.5 MB in the beginning and 238.0 MB in the end (delta: 54.5 MB). Free memory was 149.8 MB in the beginning and 147.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 57.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:47,461 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 183.5 MB. Free memory is still 166.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:50:47,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.47 ms. Allocated memory is still 183.5 MB. Free memory was 149.6 MB in the beginning and 139.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:47,461 INFO L168 Benchmark]: Boogie Preprocessor took 45.94 ms. Allocated memory is still 183.5 MB. Free memory was 139.7 MB in the beginning and 138.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:47,461 INFO L168 Benchmark]: RCFGBuilder took 320.40 ms. Allocated memory is still 183.5 MB. Free memory was 138.3 MB in the beginning and 153.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:47,461 INFO L168 Benchmark]: IcfgTransformer took 16.95 ms. Allocated memory is still 183.5 MB. Free memory was 153.3 MB in the beginning and 151.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:47,461 INFO L168 Benchmark]: TraceAbstraction took 288424.30 ms. Allocated memory was 183.5 MB in the beginning and 238.0 MB in the end (delta: 54.5 MB). Free memory was 151.7 MB in the beginning and 147.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 59.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:47,462 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 183.5 MB. Free memory is still 166.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 195.47 ms. Allocated memory is still 183.5 MB. Free memory was 149.6 MB in the beginning and 139.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.94 ms. Allocated memory is still 183.5 MB. Free memory was 139.7 MB in the beginning and 138.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 320.40 ms. Allocated memory is still 183.5 MB. Free memory was 138.3 MB in the beginning and 153.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.95 ms. Allocated memory is still 183.5 MB. Free memory was 153.3 MB in the beginning and 151.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 288424.30 ms. Allocated memory was 183.5 MB in the beginning and 238.0 MB in the end (delta: 54.5 MB). Free memory was 151.7 MB in the beginning and 147.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 59.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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: 288383.9ms, OverallIterations: 10, TraceHistogramMax: 6, EmptinessCheckTime: 18.4ms, AutomataDifference: 209068.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 246 SDtfs, 176 SDslu, 1291 SDs, 0 SdLazy, 1367 SolverSat, 85 SolverUnsat, 63 SolverUnknown, 0 SolverNotchecked, 162435.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 518 GetRequests, 403 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 119915.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 71.4ms AutomataMinimizationTime, 10 MinimizatonAttempts, 57 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 114.6ms SsaConstructionTime, 373.2ms SatisfiabilityAnalysisTime, 76247.7ms InterpolantComputationTime, 510 NumberOfCodeBlocks, 440 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 500 ConstructedInterpolants, 0 QuantifiedInterpolants, 2896 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1415 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 421/573 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...